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apache / commons-lang / 7d9d4d41a6327c813504e6da4df49fbff33dc02f / . / src / test / java / org / apache / commons / lang3 / ClassUtilsTest.java
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.commons.lang3;
import static org.junit.jupiter.api.Assertions.assertArrayEquals;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertNotSame;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertSame;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import org.apache.commons.lang3.ClassUtils.Interfaces;
import org.apache.commons.lang3.reflect.testbed.GenericConsumer;
import org.apache.commons.lang3.reflect.testbed.GenericParent;
import org.apache.commons.lang3.reflect.testbed.StringParameterizedChild;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
/**
* Unit tests {@link org.apache.commons.lang3.ClassUtils}.
*/
@SuppressWarnings("boxing") // JUnit4 does not support primitive equality testing apart from long
public class ClassUtilsTest {
private static class CX implements IB, IA, IE {
// empty
}
private static class CY extends CX implements IB, IC {
// empty
}
private interface IA {
// empty
}
private interface IB {
// empty
}
private interface IC extends ID, IE {
// empty
}
private interface ID {
// empty
}
private interface IE extends IF {
// empty
}
private interface IF {
// empty
}
private static class Inner {
private class DeeplyNested {
// empty
}
}
private void assertGetClassReturnsClass( final Class<?> c ) throws Exception {
assertEquals( c, ClassUtils.getClass( c.getName() ) );
}
private void assertGetClassThrowsClassNotFound( final String className ) {
assertGetClassThrowsException( className, ClassNotFoundException.class );
}
private void assertGetClassThrowsException(final String className, final Class<? extends Exception> exceptionType) {
assertThrows(exceptionType,
() -> ClassUtils.getClass(className),
"ClassUtils.getClass() should fail with an exception of type " + exceptionType.getName() + " when given class name \"" + className + "\"." );
}
private void assertGetClassThrowsNullPointerException( final String className ) {
assertGetClassThrowsException( className, NullPointerException.class );
}
@Test
public void test_convertClassesToClassNames_List() {
final List<Class<?>> list = new ArrayList<>();
List<String> result = ClassUtils.convertClassesToClassNames(list);
assertEquals(0, result.size());
list.add(String.class);
list.add(null);
list.add(Object.class);
result = ClassUtils.convertClassesToClassNames(list);
assertEquals(3, result.size());
assertEquals("java.lang.String", result.get(0));
assertNull(result.get(1));
assertEquals("java.lang.Object", result.get(2));
@SuppressWarnings("unchecked") // test what happens when non-generic code adds wrong type of element
final List<Object> olist = (List<Object>) (List<?>) list;
olist.add(new Object());
assertThrows(ClassCastException.class,
() -> ClassUtils.convertClassesToClassNames(list),
"Should not have been able to convert list");
assertNull(ClassUtils.convertClassesToClassNames(null));
}
@Test
public void test_convertClassNamesToClasses_List() {
final List<String> list = new ArrayList<>();
List<Class<?>> result = ClassUtils.convertClassNamesToClasses(list);
assertEquals(0, result.size());
list.add("java.lang.String");
list.add("java.lang.xxx");
list.add("java.lang.Object");
result = ClassUtils.convertClassNamesToClasses(list);
assertEquals(3, result.size());
assertEquals(String.class, result.get(0));
assertNull(result.get(1));
assertEquals(Object.class, result.get(2));
@SuppressWarnings("unchecked") // test what happens when non-generic code adds wrong type of element
final List<Object> olist = (List<Object>) (List<?>) list;
olist.add(new Object());
assertThrows(ClassCastException.class,
() -> ClassUtils.convertClassNamesToClasses(list),
"Should not have been able to convert list");
assertNull(ClassUtils.convertClassNamesToClasses(null));
}
@Test
public void test_getAbbreviatedName_Class() {
assertEquals("", ClassUtils.getAbbreviatedName((Class<?>) null, 1));
assertEquals("j.l.String", ClassUtils.getAbbreviatedName(String.class, 1));
assertEquals("j.l.String", ClassUtils.getAbbreviatedName(String.class, 5));
assertEquals("o.a.c.l.ClassUtils", ClassUtils.getAbbreviatedName(ClassUtils.class, 18));
assertEquals("j.lang.String", ClassUtils.getAbbreviatedName(String.class, 13));
assertEquals("j.lang.String", ClassUtils.getAbbreviatedName(String.class, 15));
assertEquals("java.lang.String", ClassUtils.getAbbreviatedName(String.class, 20));
}
@Test
@DisplayName("When the desired length is negative then exception is thrown")
public void test_getAbbreviatedName_Class_NegativeLen() {
assertThrows(IllegalArgumentException.class, () -> ClassUtils.getAbbreviatedName(String.class, -10));
}
@Test
@DisplayName("When the desired length is zero then exception is thrown")
public void test_getAbbreviatedName_Class_ZeroLen() {
assertThrows(IllegalArgumentException.class, () -> ClassUtils.getAbbreviatedName(String.class, 0));
}
@Test
public void test_getAbbreviatedName_String() {
assertEquals("", ClassUtils.getAbbreviatedName((String) null, 1));
assertEquals("", ClassUtils.getAbbreviatedName("", 1));
assertEquals("WithoutPackage", ClassUtils.getAbbreviatedName("WithoutPackage", 1));
assertEquals("j.l.String", ClassUtils.getAbbreviatedName("java.lang.String", 1));
assertEquals("o.a.c.l.ClassUtils", ClassUtils.getAbbreviatedName("org.apache.commons.lang3.ClassUtils", 18));
assertEquals("org.apache.commons.lang3.ClassUtils",
ClassUtils.getAbbreviatedName("org.apache.commons.lang3.ClassUtils",
"org.apache.commons.lang3.ClassUtils".length()));
assertEquals("o.a.c.l.ClassUtils", ClassUtils.getAbbreviatedName("o.a.c.l.ClassUtils", 18));
assertEquals("o..c.l.ClassUtils", ClassUtils.getAbbreviatedName("o..c.l.ClassUtils", 18));
assertEquals(".", ClassUtils.getAbbreviatedName(".", 18));
assertEquals(".", ClassUtils.getAbbreviatedName(".", 1));
assertEquals("..", ClassUtils.getAbbreviatedName("..", 1));
assertEquals("...", ClassUtils.getAbbreviatedName("...", 2));
assertEquals("...", ClassUtils.getAbbreviatedName("...", 3));
assertEquals("java.lang.String", ClassUtils.getAbbreviatedName("java.lang.String", Integer.MAX_VALUE));
assertEquals("j.lang.String", ClassUtils.getAbbreviatedName("java.lang.String", "j.lang.String".length()));
assertEquals("j.l.String", ClassUtils.getAbbreviatedName("java.lang.String", "j.lang.String".length() - 1));
assertEquals("j.l.String", ClassUtils.getAbbreviatedName("java.lang.String", "j.l.String".length()));
assertEquals("j.l.String", ClassUtils.getAbbreviatedName("java.lang.String", "j.l.String".length() - 1));
}
/**
* Test that in case the required length is larger than the name and thus there is no need for any shortening
* then the returned string object is the same as the one passed as argument. Note, however, that this is
* tested as an internal implementation detail, but it is not a guaranteed feature of the implementation.
*/
@Test
@DisplayName("When the length hint is longer than the actual length then the same String object is returned")
public void test_getAbbreviatedName_TooLongHint(){
final String className = "java.lang.String";
Assertions.assertSame(className, ClassUtils.getAbbreviatedName(className, className.length()+1));
Assertions.assertSame(className, ClassUtils.getAbbreviatedName(className, className.length()));
}
@Test
public void test_getAllInterfaces_Class() {
final List<?> list = ClassUtils.getAllInterfaces(CY.class);
assertEquals(6, list.size());
assertEquals(IB.class, list.get(0));
assertEquals(IC.class, list.get(1));
assertEquals(ID.class, list.get(2));
assertEquals(IE.class, list.get(3));
assertEquals(IF.class, list.get(4));
assertEquals(IA.class, list.get(5));
assertNull(ClassUtils.getAllInterfaces(null));
}
@Test
public void test_getAllSuperclasses_Class() {
final List<?> list = ClassUtils.getAllSuperclasses(CY.class);
assertEquals(2, list.size());
assertEquals(CX.class, list.get(0));
assertEquals(Object.class, list.get(1));
assertNull(ClassUtils.getAllSuperclasses(null));
}
@Test
public void test_getCanonicalName_Class() {
assertEquals("org.apache.commons.lang3.ClassUtils", ClassUtils.getCanonicalName(ClassUtils.class));
assertEquals("java.util.Map.Entry", ClassUtils.getCanonicalName(Map.Entry.class));
assertEquals("", ClassUtils.getCanonicalName((Class<?>) null));
assertEquals("java.lang.String[]", ClassUtils.getCanonicalName(String[].class));
assertEquals("java.util.Map.Entry[]", ClassUtils.getCanonicalName(Map.Entry[].class));
// Primitives
assertEquals("boolean", ClassUtils.getCanonicalName(boolean.class));
assertEquals("byte", ClassUtils.getCanonicalName(byte.class));
assertEquals("char", ClassUtils.getCanonicalName(char.class));
assertEquals("short", ClassUtils.getCanonicalName(short.class));
assertEquals("int", ClassUtils.getCanonicalName(int.class));
assertEquals("long", ClassUtils.getCanonicalName(long.class));
assertEquals("float", ClassUtils.getCanonicalName(float.class));
assertEquals("double", ClassUtils.getCanonicalName(double.class));
// Primitive Arrays
assertEquals("boolean[]", ClassUtils.getCanonicalName(boolean[].class));
assertEquals("byte[]", ClassUtils.getCanonicalName(byte[].class));
assertEquals("char[]", ClassUtils.getCanonicalName(char[].class));
assertEquals("short[]", ClassUtils.getCanonicalName(short[].class));
assertEquals("int[]", ClassUtils.getCanonicalName(int[].class));
assertEquals("long[]", ClassUtils.getCanonicalName(long[].class));
assertEquals("float[]", ClassUtils.getCanonicalName(float[].class));
assertEquals("double[]", ClassUtils.getCanonicalName(double[].class));
// Arrays of arrays of ...
assertEquals("java.lang.String[][]", ClassUtils.getCanonicalName(String[][].class));
assertEquals("java.lang.String[][][]", ClassUtils.getCanonicalName(String[][][].class));
assertEquals("java.lang.String[][][][]", ClassUtils.getCanonicalName(String[][][][].class));
// Inner types
class Named {
// empty
}
assertEquals(StringUtils.EMPTY, ClassUtils.getCanonicalName(new Object() {
// empty
}.getClass()));
assertEquals(StringUtils.EMPTY, ClassUtils.getCanonicalName(Named.class));
assertEquals("org.apache.commons.lang3.ClassUtilsTest.Inner", ClassUtils.getCanonicalName(Inner.class));
}
@Test
public void test_getCanonicalName_Class_String() {
assertEquals("org.apache.commons.lang3.ClassUtils", ClassUtils.getCanonicalName(ClassUtils.class, "X"));
assertEquals("java.util.Map.Entry", ClassUtils.getCanonicalName(Map.Entry.class, "X"));
assertEquals("X", ClassUtils.getCanonicalName((Class<?>) null, "X"));
assertEquals("java.lang.String[]", ClassUtils.getCanonicalName(String[].class, "X"));
assertEquals("java.util.Map.Entry[]", ClassUtils.getCanonicalName(Map.Entry[].class, "X"));
// Primitives
assertEquals("boolean", ClassUtils.getCanonicalName(boolean.class, "X"));
assertEquals("byte", ClassUtils.getCanonicalName(byte.class, "X"));
assertEquals("char", ClassUtils.getCanonicalName(char.class, "X"));
assertEquals("short", ClassUtils.getCanonicalName(short.class, "X"));
assertEquals("int", ClassUtils.getCanonicalName(int.class, "X"));
assertEquals("long", ClassUtils.getCanonicalName(long.class, "X"));
assertEquals("float", ClassUtils.getCanonicalName(float.class, "X"));
assertEquals("double", ClassUtils.getCanonicalName(double.class, "X"));
// Primitive Arrays
assertEquals("boolean[]", ClassUtils.getCanonicalName(boolean[].class, "X"));
assertEquals("byte[]", ClassUtils.getCanonicalName(byte[].class, "X"));
assertEquals("char[]", ClassUtils.getCanonicalName(char[].class, "X"));
assertEquals("short[]", ClassUtils.getCanonicalName(short[].class, "X"));
assertEquals("int[]", ClassUtils.getCanonicalName(int[].class, "X"));
assertEquals("long[]", ClassUtils.getCanonicalName(long[].class, "X"));
assertEquals("float[]", ClassUtils.getCanonicalName(float[].class, "X"));
assertEquals("double[]", ClassUtils.getCanonicalName(double[].class, "X"));
// Arrays of arrays of ...
assertEquals("java.lang.String[][]", ClassUtils.getCanonicalName(String[][].class, "X"));
assertEquals("java.lang.String[][][]", ClassUtils.getCanonicalName(String[][][].class, "X"));
assertEquals("java.lang.String[][][][]", ClassUtils.getCanonicalName(String[][][][].class, "X"));
// Inner types
class Named {
// empty
}
assertEquals("X", ClassUtils.getCanonicalName(new Object() {
// empty
}.getClass(), "X"));
assertEquals("X", ClassUtils.getCanonicalName(Named.class, "X"));
assertEquals("org.apache.commons.lang3.ClassUtilsTest.Inner", ClassUtils.getCanonicalName(Inner.class, "X"));
}
@Test
public void test_getName_Class() {
assertEquals("org.apache.commons.lang3.ClassUtils", ClassUtils.getName(ClassUtils.class));
assertEquals("java.util.Map$Entry", ClassUtils.getName(Map.Entry.class));
assertEquals("", ClassUtils.getName((Class<?>) null));
assertEquals("[Ljava.lang.String;", ClassUtils.getName(String[].class));
assertEquals("[Ljava.util.Map$Entry;", ClassUtils.getName(Map.Entry[].class));
// Primitives
assertEquals("boolean", ClassUtils.getName(boolean.class));
assertEquals("byte", ClassUtils.getName(byte.class));
assertEquals("char", ClassUtils.getName(char.class));
assertEquals("short", ClassUtils.getName(short.class));
assertEquals("int", ClassUtils.getName(int.class));
assertEquals("long", ClassUtils.getName(long.class));
assertEquals("float", ClassUtils.getName(float.class));
assertEquals("double", ClassUtils.getName(double.class));
// Primitive Arrays
assertEquals("[Z", ClassUtils.getName(boolean[].class));
assertEquals("[B", ClassUtils.getName(byte[].class));
assertEquals("[C", ClassUtils.getName(char[].class));
assertEquals("[S", ClassUtils.getName(short[].class));
assertEquals("[I", ClassUtils.getName(int[].class));
assertEquals("[J", ClassUtils.getName(long[].class));
assertEquals("[F", ClassUtils.getName(float[].class));
assertEquals("[D", ClassUtils.getName(double[].class));
// Arrays of arrays of ...
assertEquals("[[Ljava.lang.String;", ClassUtils.getName(String[][].class));
assertEquals("[[[Ljava.lang.String;", ClassUtils.getName(String[][][].class));
assertEquals("[[[[Ljava.lang.String;", ClassUtils.getName(String[][][][].class));
// Inner types
class Named {
// empty
}
assertEquals("org.apache.commons.lang3.ClassUtilsTest$3", ClassUtils.getName(new Object() {
// empty
}.getClass()));
assertEquals("org.apache.commons.lang3.ClassUtilsTest$3Named", ClassUtils.getName(Named.class));
assertEquals("org.apache.commons.lang3.ClassUtilsTest$Inner", ClassUtils.getName(Inner.class));
}
@Test
public void test_getName_Object() {
assertEquals("org.apache.commons.lang3.ClassUtils", ClassUtils.getName(new ClassUtils(), "<null>"));
assertEquals("org.apache.commons.lang3.ClassUtilsTest$Inner", ClassUtils.getName(new Inner(), "<null>"));
assertEquals("java.lang.String", ClassUtils.getName("hello", "<null>"));
assertEquals("<null>", ClassUtils.getName(null, "<null>"));
// Inner types
class Named {
// empty
}
assertEquals("org.apache.commons.lang3.ClassUtilsTest$4", ClassUtils.getName(new Object() {
// empty
}, "<null>"));
assertEquals("org.apache.commons.lang3.ClassUtilsTest$4Named", ClassUtils.getName(new Named(), "<null>"));
assertEquals("org.apache.commons.lang3.ClassUtilsTest$Inner", ClassUtils.getName(new Inner(), "<null>"));
}
@Test
public void test_getPackageCanonicalName_Class() {
assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName(ClassUtils.class));
assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName(ClassUtils[].class));
assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName(ClassUtils[][].class));
assertEquals("", ClassUtils.getPackageCanonicalName(int[].class));
assertEquals("", ClassUtils.getPackageCanonicalName(int[][].class));
// Inner types
class Named {
// empty
}
assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName(new Object() {
// empty
}.getClass()));
assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName(Named.class));
assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName(Inner.class));
}
@Test
public void test_getPackageCanonicalName_Object() {
assertEquals("<null>", ClassUtils.getPackageCanonicalName(null, "<null>"));
assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName(new ClassUtils(), "<null>"));
assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName(new ClassUtils[0], "<null>"));
assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName(new ClassUtils[0][0], "<null>"));
assertEquals("", ClassUtils.getPackageCanonicalName(new int[0], "<null>"));
assertEquals("", ClassUtils.getPackageCanonicalName(new int[0][0], "<null>"));
// Inner types
class Named {
// empty
}
assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName(new Object() {
// empty
}, "<null>"));
assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName(new Named(), "<null>"));
assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName(new Inner(), "<null>"));
}
@Test
public void test_getPackageCanonicalName_String() {
assertEquals("org.apache.commons.lang3",
ClassUtils.getPackageCanonicalName("org.apache.commons.lang3.ClassUtils"));
assertEquals("org.apache.commons.lang3",
ClassUtils.getPackageCanonicalName("[Lorg.apache.commons.lang3.ClassUtils;"));
assertEquals("org.apache.commons.lang3",
ClassUtils.getPackageCanonicalName("[[Lorg.apache.commons.lang3.ClassUtils;"));
assertEquals("org.apache.commons.lang3",
ClassUtils.getPackageCanonicalName("org.apache.commons.lang3.ClassUtils[]"));
assertEquals("org.apache.commons.lang3",
ClassUtils.getPackageCanonicalName("org.apache.commons.lang3.ClassUtils[][]"));
assertEquals("", ClassUtils.getPackageCanonicalName("[I"));
assertEquals("", ClassUtils.getPackageCanonicalName("[[I"));
assertEquals("", ClassUtils.getPackageCanonicalName("int[]"));
assertEquals("", ClassUtils.getPackageCanonicalName("int[][]"));
// Inner types
assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName("org.apache.commons.lang3.ClassUtilsTest$6"));
assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName("org.apache.commons.lang3.ClassUtilsTest$5Named"));
assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName("org.apache.commons.lang3.ClassUtilsTest$Inner"));
}
@Test
public void test_getPackageName_Class() {
assertEquals("java.lang", ClassUtils.getPackageName(String.class));
assertEquals("java.util", ClassUtils.getPackageName(Map.Entry.class));
assertEquals("", ClassUtils.getPackageName((Class<?>) null));
// LANG-535
assertEquals("java.lang", ClassUtils.getPackageName(String[].class));
// Primitive Arrays
assertEquals("", ClassUtils.getPackageName(boolean[].class));
assertEquals("", ClassUtils.getPackageName(byte[].class));
assertEquals("", ClassUtils.getPackageName(char[].class));
assertEquals("", ClassUtils.getPackageName(short[].class));
assertEquals("", ClassUtils.getPackageName(int[].class));
assertEquals("", ClassUtils.getPackageName(long[].class));
assertEquals("", ClassUtils.getPackageName(float[].class));
assertEquals("", ClassUtils.getPackageName(double[].class));
// Arrays of arrays of ...
assertEquals("java.lang", ClassUtils.getPackageName(String[][].class));
assertEquals("java.lang", ClassUtils.getPackageName(String[][][].class));
assertEquals("java.lang", ClassUtils.getPackageName(String[][][][].class));
// On-the-fly types
class Named {
// empty
}
assertEquals("org.apache.commons.lang3", ClassUtils.getPackageName(new Object() {
// empty
}.getClass()));
assertEquals("org.apache.commons.lang3", ClassUtils.getPackageName(Named.class));
}
@Test
public void test_getPackageName_Object() {
assertEquals("org.apache.commons.lang3", ClassUtils.getPackageName(new ClassUtils(), "<null>"));
assertEquals("org.apache.commons.lang3", ClassUtils.getPackageName(new Inner(), "<null>"));
assertEquals("<null>", ClassUtils.getPackageName(null, "<null>"));
}
@Test
public void test_getPackageName_String() {
assertEquals("org.apache.commons.lang3", ClassUtils.getPackageName(ClassUtils.class.getName()));
assertEquals("java.util", ClassUtils.getPackageName(Map.Entry.class.getName()));
assertEquals("", ClassUtils.getPackageName((String) null));
assertEquals("", ClassUtils.getPackageName(""));
}
@Test
public void test_getShortCanonicalName_Class() {
assertEquals("ClassUtils", ClassUtils.getShortCanonicalName(ClassUtils.class));
assertEquals("ClassUtils[]", ClassUtils.getShortCanonicalName(ClassUtils[].class));
assertEquals("ClassUtils[][]", ClassUtils.getShortCanonicalName(ClassUtils[][].class));
assertEquals("int[]", ClassUtils.getShortCanonicalName(int[].class));
assertEquals("int[][]", ClassUtils.getShortCanonicalName(int[][].class));
// Inner types
class Named {
// empty
}
// WARNING: this is fragile, implementation may change, naming is not guaranteed
assertEquals("ClassUtilsTest.8", ClassUtils.getShortCanonicalName(new Object() {
// empty
}.getClass()));
// WARNING: this is fragile, implementation may change, naming is not guaranteed
assertEquals("ClassUtilsTest.8Named", ClassUtils.getShortCanonicalName(Named.class));
assertEquals("ClassUtilsTest.Inner", ClassUtils.getShortCanonicalName(Inner.class));
}
@Test
public void test_getShortCanonicalName_Object() {
assertEquals("<null>", ClassUtils.getShortCanonicalName(null, "<null>"));
assertEquals("ClassUtils", ClassUtils.getShortCanonicalName(new ClassUtils(), "<null>"));
assertEquals("ClassUtils[]", ClassUtils.getShortCanonicalName(new ClassUtils[0], "<null>"));
assertEquals("ClassUtils[][]", ClassUtils.getShortCanonicalName(new ClassUtils[0][0], "<null>"));
assertEquals("int[]", ClassUtils.getShortCanonicalName(new int[0], "<null>"));
assertEquals("int[][]", ClassUtils.getShortCanonicalName(new int[0][0], "<null>"));
// Inner types
class Named {
// empty
}
// WARNING: this is fragile, implementation may change, naming is not guaranteed
assertEquals("ClassUtilsTest.9", ClassUtils.getShortCanonicalName(new Object() {
// empty
}, "<null>"));
assertEquals("ClassUtilsTest.9Named", ClassUtils.getShortCanonicalName(new Named(), "<null>"));
assertEquals("ClassUtilsTest.Inner", ClassUtils.getShortCanonicalName(new Inner(), "<null>"));
}
@Test
public void test_getShortCanonicalName_String() {
assertEquals("", ClassUtils.getShortCanonicalName((String) null));
assertEquals("Map.Entry", ClassUtils.getShortCanonicalName(java.util.Map.Entry.class.getName()));
assertEquals("Entry", ClassUtils.getShortCanonicalName(java.util.Map.Entry.class.getCanonicalName()));
assertEquals("ClassUtils", ClassUtils.getShortCanonicalName("org.apache.commons.lang3.ClassUtils"));
assertEquals("ClassUtils[]", ClassUtils.getShortCanonicalName("[Lorg.apache.commons.lang3.ClassUtils;"));
assertEquals("ClassUtils[][]", ClassUtils.getShortCanonicalName("[[Lorg.apache.commons.lang3.ClassUtils;"));
assertEquals("ClassUtils[]", ClassUtils.getShortCanonicalName("org.apache.commons.lang3.ClassUtils[]"));
assertEquals("ClassUtils[][]", ClassUtils.getShortCanonicalName("org.apache.commons.lang3.ClassUtils[][]"));
assertEquals("int[]", ClassUtils.getShortCanonicalName("[I"));
assertEquals("int[]", ClassUtils.getShortCanonicalName(int[].class.getCanonicalName()));
assertEquals("int[]", ClassUtils.getShortCanonicalName(int[].class.getName()));
assertEquals("int[][]", ClassUtils.getShortCanonicalName("[[I"));
assertEquals("int[]", ClassUtils.getShortCanonicalName("int[]"));
assertEquals("int[][]", ClassUtils.getShortCanonicalName("int[][]"));
// this is to demonstrate that the documentation and the naming of the methods
// uses the class name and canonical name totally mixed up, which cannot be
// fixed without backward compatibility break
assertEquals("int[]", int[].class.getCanonicalName());
assertEquals("[I", int[].class.getName());
// Inner types... the problem is that these are not canonical names, classes with this name do not even have canonical name
// WARNING: this is fragile, implementation may change, naming is not guaranteed
assertEquals("ClassUtilsTest.6", ClassUtils.getShortCanonicalName("org.apache.commons.lang3.ClassUtilsTest$6"));
// WARNING: this is fragile, implementation may change, naming is not guaranteed
assertEquals("ClassUtilsTest.5Named", ClassUtils.getShortCanonicalName("org.apache.commons.lang3.ClassUtilsTest$5Named"));
assertEquals("ClassUtilsTest.Inner", ClassUtils.getShortCanonicalName("org.apache.commons.lang3.ClassUtilsTest$Inner"));
// demonstrating what a canonical name is... it is a bigger issue to clean this up
assertEquals("org.apache.commons.lang3.ClassUtilsTest$10", new org.apache.commons.lang3.ClassUtilsTest(){}.getClass().getName());
assertNull(new org.apache.commons.lang3.ClassUtilsTest(){}.getClass().getCanonicalName());
}
@Test
public void test_getShortClassName_Class() {
assertEquals("ClassUtils", ClassUtils.getShortClassName(ClassUtils.class));
assertEquals("Map.Entry", ClassUtils.getShortClassName(Map.Entry.class));
assertEquals("", ClassUtils.getShortClassName((Class<?>) null));
// LANG-535
assertEquals("String[]", ClassUtils.getShortClassName(String[].class));
assertEquals("Map.Entry[]", ClassUtils.getShortClassName(Map.Entry[].class));
// Primitives
assertEquals("boolean", ClassUtils.getShortClassName(boolean.class));
assertEquals("byte", ClassUtils.getShortClassName(byte.class));
assertEquals("char", ClassUtils.getShortClassName(char.class));
assertEquals("short", ClassUtils.getShortClassName(short.class));
assertEquals("int", ClassUtils.getShortClassName(int.class));
assertEquals("long", ClassUtils.getShortClassName(long.class));
assertEquals("float", ClassUtils.getShortClassName(float.class));
assertEquals("double", ClassUtils.getShortClassName(double.class));
// Primitive Arrays
assertEquals("boolean[]", ClassUtils.getShortClassName(boolean[].class));
assertEquals("byte[]", ClassUtils.getShortClassName(byte[].class));
assertEquals("char[]", ClassUtils.getShortClassName(char[].class));
assertEquals("short[]", ClassUtils.getShortClassName(short[].class));
assertEquals("int[]", ClassUtils.getShortClassName(int[].class));
assertEquals("long[]", ClassUtils.getShortClassName(long[].class));
assertEquals("float[]", ClassUtils.getShortClassName(float[].class));
assertEquals("double[]", ClassUtils.getShortClassName(double[].class));
// Arrays of arrays of ...
assertEquals("String[][]", ClassUtils.getShortClassName(String[][].class));
assertEquals("String[][][]", ClassUtils.getShortClassName(String[][][].class));
assertEquals("String[][][][]", ClassUtils.getShortClassName(String[][][][].class));
// Inner types
class Named {
// empty
}
// WARNING: this is fragile, implementation may change, naming is not guaranteed
assertEquals("ClassUtilsTest.12", ClassUtils.getShortClassName(new Object() {
// empty
}.getClass()));
// WARNING: this is fragile, implementation may change, naming is not guaranteed
assertEquals("ClassUtilsTest.10Named", ClassUtils.getShortClassName(Named.class));
assertEquals("ClassUtilsTest.Inner", ClassUtils.getShortClassName(Inner.class));
}
@Test
public void test_getShortClassName_Object() {
assertEquals("ClassUtils", ClassUtils.getShortClassName(new ClassUtils(), "<null>"));
assertEquals("ClassUtilsTest.Inner", ClassUtils.getShortClassName(new Inner(), "<null>"));
assertEquals("String", ClassUtils.getShortClassName("hello", "<null>"));
assertEquals("<null>", ClassUtils.getShortClassName(null, "<null>"));
// Inner types
class Named {
// empty
}
// WARNING: this is fragile, implementation may change, naming is not guaranteed
assertEquals("ClassUtilsTest.13", ClassUtils.getShortClassName(new Object() {
// empty
}, "<null>"));
// WARNING: this is fragile, implementation may change, naming is not guaranteed
assertEquals("ClassUtilsTest.11Named", ClassUtils.getShortClassName(new Named(), "<null>"));
assertEquals("ClassUtilsTest.Inner", ClassUtils.getShortClassName(new Inner(), "<null>"));
}
@Test
public void test_getShortClassName_String() {
assertEquals("ClassUtils", ClassUtils.getShortClassName(ClassUtils.class.getName()));
assertEquals("Map.Entry", ClassUtils.getShortClassName(Map.Entry.class.getName()));
assertEquals("", ClassUtils.getShortClassName((String) null));
assertEquals("", ClassUtils.getShortClassName(""));
}
@Test
public void test_getSimpleName_Class() {
assertEquals("ClassUtils", ClassUtils.getSimpleName(ClassUtils.class));
assertEquals("Entry", ClassUtils.getSimpleName(Map.Entry.class));
assertEquals("", ClassUtils.getSimpleName(null));
// LANG-535
assertEquals("String[]", ClassUtils.getSimpleName(String[].class));
assertEquals("Entry[]", ClassUtils.getSimpleName(Map.Entry[].class));
// Primitives
assertEquals("boolean", ClassUtils.getSimpleName(boolean.class));
assertEquals("byte", ClassUtils.getSimpleName(byte.class));
assertEquals("char", ClassUtils.getSimpleName(char.class));
assertEquals("short", ClassUtils.getSimpleName(short.class));
assertEquals("int", ClassUtils.getSimpleName(int.class));
assertEquals("long", ClassUtils.getSimpleName(long.class));
assertEquals("float", ClassUtils.getSimpleName(float.class));
assertEquals("double", ClassUtils.getSimpleName(double.class));
// Primitive Arrays
assertEquals("boolean[]", ClassUtils.getSimpleName(boolean[].class));
assertEquals("byte[]", ClassUtils.getSimpleName(byte[].class));
assertEquals("char[]", ClassUtils.getSimpleName(char[].class));
assertEquals("short[]", ClassUtils.getSimpleName(short[].class));
assertEquals("int[]", ClassUtils.getSimpleName(int[].class));
assertEquals("long[]", ClassUtils.getSimpleName(long[].class));
assertEquals("float[]", ClassUtils.getSimpleName(float[].class));
assertEquals("double[]", ClassUtils.getSimpleName(double[].class));
// Arrays of arrays of ...
assertEquals("String[][]", ClassUtils.getSimpleName(String[][].class));
assertEquals("String[][][]", ClassUtils.getSimpleName(String[][][].class));
assertEquals("String[][][][]", ClassUtils.getSimpleName(String[][][][].class));
// On-the-fly types
class Named {
// empty
}
assertEquals("", ClassUtils.getSimpleName(new Object() {
// empty
}.getClass()));
assertEquals("Named", ClassUtils.getSimpleName(Named.class));
}
@Test
public void test_getSimpleName_Object() {
assertEquals("ClassUtils", ClassUtils.getSimpleName(new ClassUtils()));
assertEquals("Inner", ClassUtils.getSimpleName(new Inner()));
assertEquals("String", ClassUtils.getSimpleName("hello"));
assertEquals(StringUtils.EMPTY, ClassUtils.getSimpleName(null));
assertEquals(StringUtils.EMPTY, ClassUtils.getSimpleName(null));
}
@Test
public void test_getSimpleName_Object_String() {
assertEquals("ClassUtils", ClassUtils.getSimpleName(new ClassUtils(), "<null>"));
assertEquals("Inner", ClassUtils.getSimpleName(new Inner(), "<null>"));
assertEquals("String", ClassUtils.getSimpleName("hello", "<null>"));
assertEquals("<null>", ClassUtils.getSimpleName(null, "<null>"));
assertNull(ClassUtils.getSimpleName(null, null));
}
@Test
public void test_isAssignable() {
assertFalse(ClassUtils.isAssignable((Class<?>) null, null));
assertFalse(ClassUtils.isAssignable(String.class, null));
assertTrue(ClassUtils.isAssignable(null, Object.class));
assertTrue(ClassUtils.isAssignable(null, Integer.class));
assertFalse(ClassUtils.isAssignable(null, Integer.TYPE));
assertTrue(ClassUtils.isAssignable(String.class, Object.class));
assertTrue(ClassUtils.isAssignable(String.class, String.class));
assertFalse(ClassUtils.isAssignable(Object.class, String.class));
assertTrue(ClassUtils.isAssignable(Integer.TYPE, Integer.class));
assertTrue(ClassUtils.isAssignable(Integer.TYPE, Object.class));
assertTrue(ClassUtils.isAssignable(Integer.class, Integer.TYPE));
assertTrue(ClassUtils.isAssignable(Integer.class, Object.class));
assertTrue(ClassUtils.isAssignable(Integer.TYPE, Integer.TYPE));
assertTrue(ClassUtils.isAssignable(Integer.class, Integer.class));
assertTrue(ClassUtils.isAssignable(Boolean.TYPE, Boolean.class));
assertTrue(ClassUtils.isAssignable(Boolean.TYPE, Object.class));
assertTrue(ClassUtils.isAssignable(Boolean.class, Boolean.TYPE));
assertTrue(ClassUtils.isAssignable(Boolean.class, Object.class));
assertTrue(ClassUtils.isAssignable(Boolean.TYPE, Boolean.TYPE));
assertTrue(ClassUtils.isAssignable(Boolean.class, Boolean.class));
}
@Test
public void test_isAssignable_Autoboxing() {
assertFalse(ClassUtils.isAssignable((Class<?>) null, null, true));
assertFalse(ClassUtils.isAssignable(String.class, null, true));
assertTrue(ClassUtils.isAssignable(null, Object.class, true));
assertTrue(ClassUtils.isAssignable(null, Integer.class, true));
assertFalse(ClassUtils.isAssignable(null, Integer.TYPE, true));
assertTrue(ClassUtils.isAssignable(String.class, Object.class, true));
assertTrue(ClassUtils.isAssignable(String.class, String.class, true));
assertFalse(ClassUtils.isAssignable(Object.class, String.class, true));
assertTrue(ClassUtils.isAssignable(Integer.TYPE, Integer.class, true));
assertTrue(ClassUtils.isAssignable(Integer.TYPE, Object.class, true));
assertTrue(ClassUtils.isAssignable(Integer.class, Integer.TYPE, true));
assertTrue(ClassUtils.isAssignable(Integer.class, Object.class, true));
assertTrue(ClassUtils.isAssignable(Integer.TYPE, Integer.TYPE, true));
assertTrue(ClassUtils.isAssignable(Integer.class, Integer.class, true));
assertTrue(ClassUtils.isAssignable(Boolean.TYPE, Boolean.class, true));
assertTrue(ClassUtils.isAssignable(Boolean.class, Boolean.TYPE, true));
assertTrue(ClassUtils.isAssignable(Boolean.class, Object.class, true));
assertTrue(ClassUtils.isAssignable(Boolean.TYPE, Boolean.TYPE, true));
assertTrue(ClassUtils.isAssignable(Boolean.class, Boolean.class, true));
}
@Test
public void test_isAssignable_ClassArray_ClassArray() {
final Class<?>[] array2 = new Class[] {Object.class, Object.class};
final Class<?>[] array1 = new Class[] {Object.class};
final Class<?>[] array1s = new Class[] {String.class};
final Class<?>[] array0 = new Class[] {};
final Class<?>[] arrayPrimitives = { Integer.TYPE, Boolean.TYPE };
final Class<?>[] arrayWrappers = { Integer.class, Boolean.class };
assertFalse(ClassUtils.isAssignable(array1, array2));
assertFalse(ClassUtils.isAssignable(null, array2));
assertTrue(ClassUtils.isAssignable(null, array0));
assertTrue(ClassUtils.isAssignable(array0, array0));
assertTrue(ClassUtils.isAssignable(array0, (Class<?>[]) null)); // explicit cast to avoid warning
assertTrue(ClassUtils.isAssignable(null, (Class<?>[]) null)); // explicit cast to avoid warning
assertFalse(ClassUtils.isAssignable(array1, array1s));
assertTrue(ClassUtils.isAssignable(array1s, array1s));
assertTrue(ClassUtils.isAssignable(array1s, array1));
assertTrue(ClassUtils.isAssignable(arrayPrimitives, arrayWrappers));
assertTrue(ClassUtils.isAssignable(arrayWrappers, arrayPrimitives));
assertFalse(ClassUtils.isAssignable(arrayPrimitives, array1));
assertFalse(ClassUtils.isAssignable(arrayWrappers, array1));
assertTrue(ClassUtils.isAssignable(arrayPrimitives, array2));
assertTrue(ClassUtils.isAssignable(arrayWrappers, array2));
}
@Test
public void test_isAssignable_ClassArray_ClassArray_Autoboxing() {
final Class<?>[] array2 = new Class[] {Object.class, Object.class};
final Class<?>[] array1 = new Class[] {Object.class};
final Class<?>[] array1s = new Class[] {String.class};
final Class<?>[] array0 = new Class[] {};
final Class<?>[] arrayPrimitives = { Integer.TYPE, Boolean.TYPE };
final Class<?>[] arrayWrappers = { Integer.class, Boolean.class };
assertFalse(ClassUtils.isAssignable(array1, array2, true));
assertFalse(ClassUtils.isAssignable(null, array2, true));
assertTrue(ClassUtils.isAssignable(null, array0, true));
assertTrue(ClassUtils.isAssignable(array0, array0, true));
assertTrue(ClassUtils.isAssignable(array0, null, true));
assertTrue(ClassUtils.isAssignable((Class[]) null, null, true));
assertFalse(ClassUtils.isAssignable(array1, array1s, true));
assertTrue(ClassUtils.isAssignable(array1s, array1s, true));
assertTrue(ClassUtils.isAssignable(array1s, array1, true));
assertTrue(ClassUtils.isAssignable(arrayPrimitives, arrayWrappers, true));
assertTrue(ClassUtils.isAssignable(arrayWrappers, arrayPrimitives, true));
assertFalse(ClassUtils.isAssignable(arrayPrimitives, array1, true));
assertFalse(ClassUtils.isAssignable(arrayWrappers, array1, true));
assertTrue(ClassUtils.isAssignable(arrayPrimitives, array2, true));
assertTrue(ClassUtils.isAssignable(arrayWrappers, array2, true));
}
@Test
public void test_isAssignable_ClassArray_ClassArray_NoAutoboxing() {
final Class<?>[] array2 = new Class[] {Object.class, Object.class};
final Class<?>[] array1 = new Class[] {Object.class};
final Class<?>[] array1s = new Class[] {String.class};
final Class<?>[] array0 = new Class[] {};
final Class<?>[] arrayPrimitives = { Integer.TYPE, Boolean.TYPE };
final Class<?>[] arrayWrappers = { Integer.class, Boolean.class };
assertFalse(ClassUtils.isAssignable(array1, array2, false));
assertFalse(ClassUtils.isAssignable(null, array2, false));
assertTrue(ClassUtils.isAssignable(null, array0, false));
assertTrue(ClassUtils.isAssignable(array0, array0, false));
assertTrue(ClassUtils.isAssignable(array0, null, false));
assertTrue(ClassUtils.isAssignable((Class[]) null, null, false));
assertFalse(ClassUtils.isAssignable(array1, array1s, false));
assertTrue(ClassUtils.isAssignable(array1s, array1s, false));
assertTrue(ClassUtils.isAssignable(array1s, array1, false));
assertFalse(ClassUtils.isAssignable(arrayPrimitives, arrayWrappers, false));
assertFalse(ClassUtils.isAssignable(arrayWrappers, arrayPrimitives, false));
assertFalse(ClassUtils.isAssignable(arrayPrimitives, array1, false));
assertFalse(ClassUtils.isAssignable(arrayWrappers, array1, false));
assertTrue(ClassUtils.isAssignable(arrayWrappers, array2, false));
assertFalse(ClassUtils.isAssignable(arrayPrimitives, array2, false));
}
@Test
public void test_isAssignable_DefaultUnboxing_Widening() {
// test byte conversions
assertFalse(ClassUtils.isAssignable(Byte.class, Character.TYPE), "byte -> char");
assertTrue(ClassUtils.isAssignable(Byte.class, Byte.TYPE), "byte -> byte");
assertTrue(ClassUtils.isAssignable(Byte.class, Short.TYPE), "byte -> short");
assertTrue(ClassUtils.isAssignable(Byte.class, Integer.TYPE), "byte -> int");
assertTrue(ClassUtils.isAssignable(Byte.class, Long.TYPE), "byte -> long");
assertTrue(ClassUtils.isAssignable(Byte.class, Float.TYPE), "byte -> float");
assertTrue(ClassUtils.isAssignable(Byte.class, Double.TYPE), "byte -> double");
assertFalse(ClassUtils.isAssignable(Byte.class, Boolean.TYPE), "byte -> boolean");
// test short conversions
assertFalse(ClassUtils.isAssignable(Short.class, Character.TYPE), "short -> char");
assertFalse(ClassUtils.isAssignable(Short.class, Byte.TYPE), "short -> byte");
assertTrue(ClassUtils.isAssignable(Short.class, Short.TYPE), "short -> short");
assertTrue(ClassUtils.isAssignable(Short.class, Integer.TYPE), "short -> int");
assertTrue(ClassUtils.isAssignable(Short.class, Long.TYPE), "short -> long");
assertTrue(ClassUtils.isAssignable(Short.class, Float.TYPE), "short -> float");
assertTrue(ClassUtils.isAssignable(Short.class, Double.TYPE), "short -> double");
assertFalse(ClassUtils.isAssignable(Short.class, Boolean.TYPE), "short -> boolean");
// test char conversions
assertTrue(ClassUtils.isAssignable(Character.class, Character.TYPE), "char -> char");
assertFalse(ClassUtils.isAssignable(Character.class, Byte.TYPE), "char -> byte");
assertFalse(ClassUtils.isAssignable(Character.class, Short.TYPE), "char -> short");
assertTrue(ClassUtils.isAssignable(Character.class, Integer.TYPE), "char -> int");
assertTrue(ClassUtils.isAssignable(Character.class, Long.TYPE), "char -> long");
assertTrue(ClassUtils.isAssignable(Character.class, Float.TYPE), "char -> float");
assertTrue(ClassUtils.isAssignable(Character.class, Double.TYPE), "char -> double");
assertFalse(ClassUtils.isAssignable(Character.class, Boolean.TYPE), "char -> boolean");
// test int conversions
assertFalse(ClassUtils.isAssignable(Integer.class, Character.TYPE), "int -> char");
assertFalse(ClassUtils.isAssignable(Integer.class, Byte.TYPE), "int -> byte");
assertFalse(ClassUtils.isAssignable(Integer.class, Short.TYPE), "int -> short");
assertTrue(ClassUtils.isAssignable(Integer.class, Integer.TYPE), "int -> int");
assertTrue(ClassUtils.isAssignable(Integer.class, Long.TYPE), "int -> long");
assertTrue(ClassUtils.isAssignable(Integer.class, Float.TYPE), "int -> float");
assertTrue(ClassUtils.isAssignable(Integer.class, Double.TYPE), "int -> double");
assertFalse(ClassUtils.isAssignable(Integer.class, Boolean.TYPE), "int -> boolean");
// test long conversions
assertFalse(ClassUtils.isAssignable(Long.class, Character.TYPE), "long -> char");
assertFalse(ClassUtils.isAssignable(Long.class, Byte.TYPE), "long -> byte");
assertFalse(ClassUtils.isAssignable(Long.class, Short.TYPE), "long -> short");
assertFalse(ClassUtils.isAssignable(Long.class, Integer.TYPE), "long -> int");
assertTrue(ClassUtils.isAssignable(Long.class, Long.TYPE), "long -> long");
assertTrue(ClassUtils.isAssignable(Long.class, Float.TYPE), "long -> float");
assertTrue(ClassUtils.isAssignable(Long.class, Double.TYPE), "long -> double");
assertFalse(ClassUtils.isAssignable(Long.class, Boolean.TYPE), "long -> boolean");
// test float conversions
assertFalse(ClassUtils.isAssignable(Float.class, Character.TYPE), "float -> char");
assertFalse(ClassUtils.isAssignable(Float.class, Byte.TYPE), "float -> byte");
assertFalse(ClassUtils.isAssignable(Float.class, Short.TYPE), "float -> short");
assertFalse(ClassUtils.isAssignable(Float.class, Integer.TYPE), "float -> int");
assertFalse(ClassUtils.isAssignable(Float.class, Long.TYPE), "float -> long");
assertTrue(ClassUtils.isAssignable(Float.class, Float.TYPE), "float -> float");
assertTrue(ClassUtils.isAssignable(Float.class, Double.TYPE), "float -> double");
assertFalse(ClassUtils.isAssignable(Float.class, Boolean.TYPE), "float -> boolean");
// test double conversions
assertFalse(ClassUtils.isAssignable(Double.class, Character.TYPE), "double -> char");
assertFalse(ClassUtils.isAssignable(Double.class, Byte.TYPE), "double -> byte");
assertFalse(ClassUtils.isAssignable(Double.class, Short.TYPE), "double -> short");
assertFalse(ClassUtils.isAssignable(Double.class, Integer.TYPE), "double -> int");
assertFalse(ClassUtils.isAssignable(Double.class, Long.TYPE), "double -> long");
assertFalse(ClassUtils.isAssignable(Double.class, Float.TYPE), "double -> float");
assertTrue(ClassUtils.isAssignable(Double.class, Double.TYPE), "double -> double");
assertFalse(ClassUtils.isAssignable(Double.class, Boolean.TYPE), "double -> boolean");
// test boolean conversions
assertFalse(ClassUtils.isAssignable(Boolean.class, Character.TYPE), "boolean -> char");
assertFalse(ClassUtils.isAssignable(Boolean.class, Byte.TYPE), "boolean -> byte");
assertFalse(ClassUtils.isAssignable(Boolean.class, Short.TYPE), "boolean -> short");
assertFalse(ClassUtils.isAssignable(Boolean.class, Integer.TYPE), "boolean -> int");
assertFalse(ClassUtils.isAssignable(Boolean.class, Long.TYPE), "boolean -> long");
assertFalse(ClassUtils.isAssignable(Boolean.class, Float.TYPE), "boolean -> float");
assertFalse(ClassUtils.isAssignable(Boolean.class, Double.TYPE), "boolean -> double");
assertTrue(ClassUtils.isAssignable(Boolean.class, Boolean.TYPE), "boolean -> boolean");
}
@Test
public void test_isAssignable_NoAutoboxing() {
assertFalse(ClassUtils.isAssignable((Class<?>) null, null, false));
assertFalse(ClassUtils.isAssignable(String.class, null, false));
assertTrue(ClassUtils.isAssignable(null, Object.class, false));
assertTrue(ClassUtils.isAssignable(null, Integer.class, false));
assertFalse(ClassUtils.isAssignable(null, Integer.TYPE, false));
assertTrue(ClassUtils.isAssignable(String.class, Object.class, false));
assertTrue(ClassUtils.isAssignable(String.class, String.class, false));
assertFalse(ClassUtils.isAssignable(Object.class, String.class, false));
assertFalse(ClassUtils.isAssignable(Integer.TYPE, Integer.class, false));
assertFalse(ClassUtils.isAssignable(Integer.TYPE, Object.class, false));
assertFalse(ClassUtils.isAssignable(Integer.class, Integer.TYPE, false));
assertTrue(ClassUtils.isAssignable(Integer.TYPE, Integer.TYPE, false));
assertTrue(ClassUtils.isAssignable(Integer.class, Integer.class, false));
assertFalse(ClassUtils.isAssignable(Boolean.TYPE, Boolean.class, false));
assertFalse(ClassUtils.isAssignable(Boolean.TYPE, Object.class, false));
assertFalse(ClassUtils.isAssignable(Boolean.class, Boolean.TYPE, false));
assertTrue(ClassUtils.isAssignable(Boolean.class, Object.class, false));
assertTrue(ClassUtils.isAssignable(Boolean.TYPE, Boolean.TYPE, false));
assertTrue(ClassUtils.isAssignable(Boolean.class, Boolean.class, false));
}
@Test
public void test_isAssignable_Unboxing_Widening() {
// test byte conversions
assertFalse(ClassUtils.isAssignable(Byte.class, Character.TYPE, true), "byte -> char");
assertTrue(ClassUtils.isAssignable(Byte.class, Byte.TYPE, true), "byte -> byte");
assertTrue(ClassUtils.isAssignable(Byte.class, Short.TYPE, true), "byte -> short");
assertTrue(ClassUtils.isAssignable(Byte.class, Integer.TYPE, true), "byte -> int");
assertTrue(ClassUtils.isAssignable(Byte.class, Long.TYPE, true), "byte -> long");
assertTrue(ClassUtils.isAssignable(Byte.class, Float.TYPE, true), "byte -> float");
assertTrue(ClassUtils.isAssignable(Byte.class, Double.TYPE, true), "byte -> double");
assertFalse(ClassUtils.isAssignable(Byte.class, Boolean.TYPE, true), "byte -> boolean");
// test short conversions
assertFalse(ClassUtils.isAssignable(Short.class, Character.TYPE, true), "short -> char");
assertFalse(ClassUtils.isAssignable(Short.class, Byte.TYPE, true), "short -> byte");
assertTrue(ClassUtils.isAssignable(Short.class, Short.TYPE, true), "short -> short");
assertTrue(ClassUtils.isAssignable(Short.class, Integer.TYPE, true), "short -> int");
assertTrue(ClassUtils.isAssignable(Short.class, Long.TYPE, true), "short -> long");
assertTrue(ClassUtils.isAssignable(Short.class, Float.TYPE, true), "short -> float");
assertTrue(ClassUtils.isAssignable(Short.class, Double.TYPE, true), "short -> double");
assertFalse(ClassUtils.isAssignable(Short.class, Boolean.TYPE, true), "short -> boolean");
// test char conversions
assertTrue(ClassUtils.isAssignable(Character.class, Character.TYPE, true), "char -> char");
assertFalse(ClassUtils.isAssignable(Character.class, Byte.TYPE, true), "char -> byte");
assertFalse(ClassUtils.isAssignable(Character.class, Short.TYPE, true), "char -> short");
assertTrue(ClassUtils.isAssignable(Character.class, Integer.TYPE, true), "char -> int");
assertTrue(ClassUtils.isAssignable(Character.class, Long.TYPE, true), "char -> long");
assertTrue(ClassUtils.isAssignable(Character.class, Float.TYPE, true), "char -> float");
assertTrue(ClassUtils.isAssignable(Character.class, Double.TYPE, true), "char -> double");
assertFalse(ClassUtils.isAssignable(Character.class, Boolean.TYPE, true), "char -> boolean");
// test int conversions
assertFalse(ClassUtils.isAssignable(Integer.class, Character.TYPE, true), "int -> char");
assertFalse(ClassUtils.isAssignable(Integer.class, Byte.TYPE, true), "int -> byte");
assertFalse(ClassUtils.isAssignable(Integer.class, Short.TYPE, true), "int -> short");
assertTrue(ClassUtils.isAssignable(Integer.class, Integer.TYPE, true), "int -> int");
assertTrue(ClassUtils.isAssignable(Integer.class, Long.TYPE, true), "int -> long");
assertTrue(ClassUtils.isAssignable(Integer.class, Float.TYPE, true), "int -> float");
assertTrue(ClassUtils.isAssignable(Integer.class, Double.TYPE, true), "int -> double");
assertFalse(ClassUtils.isAssignable(Integer.class, Boolean.TYPE, true), "int -> boolean");
// test long conversions
assertFalse(ClassUtils.isAssignable(Long.class, Character.TYPE, true), "long -> char");
assertFalse(ClassUtils.isAssignable(Long.class, Byte.TYPE, true), "long -> byte");
assertFalse(ClassUtils.isAssignable(Long.class, Short.TYPE, true), "long -> short");
assertFalse(ClassUtils.isAssignable(Long.class, Integer.TYPE, true), "long -> int");
assertTrue(ClassUtils.isAssignable(Long.class, Long.TYPE, true), "long -> long");
assertTrue(ClassUtils.isAssignable(Long.class, Float.TYPE, true), "long -> float");
assertTrue(ClassUtils.isAssignable(Long.class, Double.TYPE, true), "long -> double");
assertFalse(ClassUtils.isAssignable(Long.class, Boolean.TYPE, true), "long -> boolean");
// test float conversions
assertFalse(ClassUtils.isAssignable(Float.class, Character.TYPE, true), "float -> char");
assertFalse(ClassUtils.isAssignable(Float.class, Byte.TYPE, true), "float -> byte");
assertFalse(ClassUtils.isAssignable(Float.class, Short.TYPE, true), "float -> short");
assertFalse(ClassUtils.isAssignable(Float.class, Integer.TYPE, true), "float -> int");
assertFalse(ClassUtils.isAssignable(Float.class, Long.TYPE, true), "float -> long");
assertTrue(ClassUtils.isAssignable(Float.class, Float.TYPE, true), "float -> float");
assertTrue(ClassUtils.isAssignable(Float.class, Double.TYPE, true), "float -> double");
assertFalse(ClassUtils.isAssignable(Float.class, Boolean.TYPE, true), "float -> boolean");
// test double conversions
assertFalse(ClassUtils.isAssignable(Double.class, Character.TYPE, true), "double -> char");
assertFalse(ClassUtils.isAssignable(Double.class, Byte.TYPE, true), "double -> byte");
assertFalse(ClassUtils.isAssignable(Double.class, Short.TYPE, true), "double -> short");
assertFalse(ClassUtils.isAssignable(Double.class, Integer.TYPE, true), "double -> int");
assertFalse(ClassUtils.isAssignable(Double.class, Long.TYPE, true), "double -> long");
assertFalse(ClassUtils.isAssignable(Double.class, Float.TYPE, true), "double -> float");
assertTrue(ClassUtils.isAssignable(Double.class, Double.TYPE, true), "double -> double");
assertFalse(ClassUtils.isAssignable(Double.class, Boolean.TYPE, true), "double -> boolean");
// test boolean conversions
assertFalse(ClassUtils.isAssignable(Boolean.class, Character.TYPE, true), "boolean -> char");
assertFalse(ClassUtils.isAssignable(Boolean.class, Byte.TYPE, true), "boolean -> byte");
assertFalse(ClassUtils.isAssignable(Boolean.class, Short.TYPE, true), "boolean -> short");
assertFalse(ClassUtils.isAssignable(Boolean.class, Integer.TYPE, true), "boolean -> int");
assertFalse(ClassUtils.isAssignable(Boolean.class, Long.TYPE, true), "boolean -> long");
assertFalse(ClassUtils.isAssignable(Boolean.class, Float.TYPE, true), "boolean -> float");
assertFalse(ClassUtils.isAssignable(Boolean.class, Double.TYPE, true), "boolean -> double");
assertTrue(ClassUtils.isAssignable(Boolean.class, Boolean.TYPE, true), "boolean -> boolean");
}
@Test
public void test_isAssignable_Widening() {
// test byte conversions
assertFalse(ClassUtils.isAssignable(Byte.TYPE, Character.TYPE), "byte -> char");
assertTrue(ClassUtils.isAssignable(Byte.TYPE, Byte.TYPE), "byte -> byte");
assertTrue(ClassUtils.isAssignable(Byte.TYPE, Short.TYPE), "byte -> short");
assertTrue(ClassUtils.isAssignable(Byte.TYPE, Integer.TYPE), "byte -> int");
assertTrue(ClassUtils.isAssignable(Byte.TYPE, Long.TYPE), "byte -> long");
assertTrue(ClassUtils.isAssignable(Byte.TYPE, Float.TYPE), "byte -> float");
assertTrue(ClassUtils.isAssignable(Byte.TYPE, Double.TYPE), "byte -> double");
assertFalse(ClassUtils.isAssignable(Byte.TYPE, Boolean.TYPE), "byte -> boolean");
// test short conversions
assertFalse(ClassUtils.isAssignable(Short.TYPE, Character.TYPE), "short -> char");
assertFalse(ClassUtils.isAssignable(Short.TYPE, Byte.TYPE), "short -> byte");
assertTrue(ClassUtils.isAssignable(Short.TYPE, Short.TYPE), "short -> short");
assertTrue(ClassUtils.isAssignable(Short.TYPE, Integer.TYPE), "short -> int");
assertTrue(ClassUtils.isAssignable(Short.TYPE, Long.TYPE), "short -> long");
assertTrue(ClassUtils.isAssignable(Short.TYPE, Float.TYPE), "short -> float");
assertTrue(ClassUtils.isAssignable(Short.TYPE, Double.TYPE), "short -> double");
assertFalse(ClassUtils.isAssignable(Short.TYPE, Boolean.TYPE), "short -> boolean");
// test char conversions
assertTrue(ClassUtils.isAssignable(Character.TYPE, Character.TYPE), "char -> char");
assertFalse(ClassUtils.isAssignable(Character.TYPE, Byte.TYPE), "char -> byte");
assertFalse(ClassUtils.isAssignable(Character.TYPE, Short.TYPE), "char -> short");
assertTrue(ClassUtils.isAssignable(Character.TYPE, Integer.TYPE), "char -> int");
assertTrue(ClassUtils.isAssignable(Character.TYPE, Long.TYPE), "char -> long");
assertTrue(ClassUtils.isAssignable(Character.TYPE, Float.TYPE), "char -> float");
assertTrue(ClassUtils.isAssignable(Character.TYPE, Double.TYPE), "char -> double");
assertFalse(ClassUtils.isAssignable(Character.TYPE, Boolean.TYPE), "char -> boolean");
// test int conversions
assertFalse(ClassUtils.isAssignable(Integer.TYPE, Character.TYPE), "int -> char");
assertFalse(ClassUtils.isAssignable(Integer.TYPE, Byte.TYPE), "int -> byte");
assertFalse(ClassUtils.isAssignable(Integer.TYPE, Short.TYPE), "int -> short");
assertTrue(ClassUtils.isAssignable(Integer.TYPE, Integer.TYPE), "int -> int");
assertTrue(ClassUtils.isAssignable(Integer.TYPE, Long.TYPE), "int -> long");
assertTrue(ClassUtils.isAssignable(Integer.TYPE, Float.TYPE), "int -> float");
assertTrue(ClassUtils.isAssignable(Integer.TYPE, Double.TYPE), "int -> double");
assertFalse(ClassUtils.isAssignable(Integer.TYPE, Boolean.TYPE), "int -> boolean");
// test long conversions
assertFalse(ClassUtils.isAssignable(Long.TYPE, Character.TYPE), "long -> char");
assertFalse(ClassUtils.isAssignable(Long.TYPE, Byte.TYPE), "long -> byte");
assertFalse(ClassUtils.isAssignable(Long.TYPE, Short.TYPE), "long -> short");
assertFalse(ClassUtils.isAssignable(Long.TYPE, Integer.TYPE), "long -> int");
assertTrue(ClassUtils.isAssignable(Long.TYPE, Long.TYPE), "long -> long");
assertTrue(ClassUtils.isAssignable(Long.TYPE, Float.TYPE), "long -> float");
assertTrue(ClassUtils.isAssignable(Long.TYPE, Double.TYPE), "long -> double");
assertFalse(ClassUtils.isAssignable(Long.TYPE, Boolean.TYPE), "long -> boolean");
// test float conversions
assertFalse(ClassUtils.isAssignable(Float.TYPE, Character.TYPE), "float -> char");
assertFalse(ClassUtils.isAssignable(Float.TYPE, Byte.TYPE), "float -> byte");
assertFalse(ClassUtils.isAssignable(Float.TYPE, Short.TYPE), "float -> short");
assertFalse(ClassUtils.isAssignable(Float.TYPE, Integer.TYPE), "float -> int");
assertFalse(ClassUtils.isAssignable(Float.TYPE, Long.TYPE), "float -> long");
assertTrue(ClassUtils.isAssignable(Float.TYPE, Float.TYPE), "float -> float");
assertTrue(ClassUtils.isAssignable(Float.TYPE, Double.TYPE), "float -> double");
assertFalse(ClassUtils.isAssignable(Float.TYPE, Boolean.TYPE), "float -> boolean");
// test double conversions
assertFalse(ClassUtils.isAssignable(Double.TYPE, Character.TYPE), "double -> char");
assertFalse(ClassUtils.isAssignable(Double.TYPE, Byte.TYPE), "double -> byte");
assertFalse(ClassUtils.isAssignable(Double.TYPE, Short.TYPE), "double -> short");
assertFalse(ClassUtils.isAssignable(Double.TYPE, Integer.TYPE), "double -> int");
assertFalse(ClassUtils.isAssignable(Double.TYPE, Long.TYPE), "double -> long");
assertFalse(ClassUtils.isAssignable(Double.TYPE, Float.TYPE), "double -> float");
assertTrue(ClassUtils.isAssignable(Double.TYPE, Double.TYPE), "double -> double");
assertFalse(ClassUtils.isAssignable(Double.TYPE, Boolean.TYPE), "double -> boolean");
// test boolean conversions
assertFalse(ClassUtils.isAssignable(Boolean.TYPE, Character.TYPE), "boolean -> char");
assertFalse(ClassUtils.isAssignable(Boolean.TYPE, Byte.TYPE), "boolean -> byte");
assertFalse(ClassUtils.isAssignable(Boolean.TYPE, Short.TYPE), "boolean -> short");
assertFalse(ClassUtils.isAssignable(Boolean.TYPE, Integer.TYPE), "boolean -> int");
assertFalse(ClassUtils.isAssignable(Boolean.TYPE, Long.TYPE), "boolean -> long");
assertFalse(ClassUtils.isAssignable(Boolean.TYPE, Float.TYPE), "boolean -> float");
assertFalse(ClassUtils.isAssignable(Boolean.TYPE, Double.TYPE), "boolean -> double");
assertTrue(ClassUtils.isAssignable(Boolean.TYPE, Boolean.TYPE), "boolean -> boolean");
}
@Test
public void test_isInnerClass_Class() {
assertTrue(ClassUtils.isInnerClass(Inner.class));
assertTrue(ClassUtils.isInnerClass(Map.Entry.class));
assertTrue(ClassUtils.isInnerClass(new Cloneable() {
// empty
}.getClass()));
assertFalse(ClassUtils.isInnerClass(this.getClass()));
assertFalse(ClassUtils.isInnerClass(String.class));
assertFalse(ClassUtils.isInnerClass(null));
}
@Test
public void testComparable() {
final TreeMap<Class<?>, String> map = new TreeMap<>(ClassUtils.comparator());
map.put(String.class, "lastEntry");
map.toString();
map.put(Character.class, "firstEntry");
map.toString();
assertEquals("firstEntry", map.firstEntry().getValue());
assertEquals(Character.class, map.firstEntry().getKey());
//
assertEquals("lastEntry", map.lastEntry().getValue());
assertEquals(String.class, map.lastEntry().getKey());
//
map.put(null, "null");
map.toString();
assertEquals("null", map.get(null));
}
@Test
public void testConstructor() {
assertNotNull(new ClassUtils());
final Constructor<?>[] cons = ClassUtils.class.getDeclaredConstructors();
assertEquals(1, cons.length);
assertTrue(Modifier.isPublic(cons[0].getModifiers()));
assertTrue(Modifier.isPublic(ClassUtils.class.getModifiers()));
assertFalse(Modifier.isFinal(ClassUtils.class.getModifiers()));
}
@Test
public void testGetClassByNormalNameArrays() throws ClassNotFoundException {
assertEquals( int[].class, ClassUtils.getClass( "int[]" ) );
assertEquals( long[].class, ClassUtils.getClass( "long[]" ) );
assertEquals( short[].class, ClassUtils.getClass( "short[]" ) );
assertEquals( byte[].class, ClassUtils.getClass( "byte[]" ) );
assertEquals( char[].class, ClassUtils.getClass( "char[]" ) );
assertEquals( float[].class, ClassUtils.getClass( "float[]" ) );
assertEquals( double[].class, ClassUtils.getClass( "double[]" ) );
assertEquals( boolean[].class, ClassUtils.getClass( "boolean[]" ) );
assertEquals( String[].class, ClassUtils.getClass( "java.lang.String[]" ) );
assertEquals( java.util.Map.Entry[].class, ClassUtils.getClass( "java.util.Map.Entry[]" ) );
assertEquals( java.util.Map.Entry[].class, ClassUtils.getClass( "java.util.Map$Entry[]" ) );
assertEquals( java.util.Map.Entry[].class, ClassUtils.getClass( "[Ljava.util.Map.Entry;" ) );
assertEquals( java.util.Map.Entry[].class, ClassUtils.getClass( "[Ljava.util.Map$Entry;" ) );
}
@Test
public void testGetClassByNormalNameArrays2D() throws ClassNotFoundException {
assertEquals( int[][].class, ClassUtils.getClass( "int[][]" ) );
assertEquals( long[][].class, ClassUtils.getClass( "long[][]" ) );
assertEquals( short[][].class, ClassUtils.getClass( "short[][]" ) );
assertEquals( byte[][].class, ClassUtils.getClass( "byte[][]" ) );
assertEquals( char[][].class, ClassUtils.getClass( "char[][]" ) );
assertEquals( float[][].class, ClassUtils.getClass( "float[][]" ) );
assertEquals( double[][].class, ClassUtils.getClass( "double[][]" ) );
assertEquals( boolean[][].class, ClassUtils.getClass( "boolean[][]" ) );
assertEquals( String[][].class, ClassUtils.getClass( "java.lang.String[][]" ) );
}
@Test
public void testGetClassClassNotFound() throws Exception {
assertGetClassThrowsClassNotFound( "bool" );
assertGetClassThrowsClassNotFound( "bool[]" );
assertGetClassThrowsClassNotFound( "integer[]" );
}
@Test
public void testGetClassInvalidArguments() throws Exception {
assertGetClassThrowsNullPointerException( null );
assertGetClassThrowsClassNotFound( "[][][]" );
assertGetClassThrowsClassNotFound( "[[]" );
assertGetClassThrowsClassNotFound( "[" );
assertGetClassThrowsClassNotFound( "java.lang.String][" );
assertGetClassThrowsClassNotFound( ".hello.world" );
assertGetClassThrowsClassNotFound( "hello..world" );
}
@Test
public void testGetClassRawPrimitives() throws ClassNotFoundException {
assertEquals( int.class, ClassUtils.getClass( "int" ) );
assertEquals( long.class, ClassUtils.getClass( "long" ) );
assertEquals( short.class, ClassUtils.getClass( "short" ) );
assertEquals( byte.class, ClassUtils.getClass( "byte" ) );
assertEquals( char.class, ClassUtils.getClass( "char" ) );
assertEquals( float.class, ClassUtils.getClass( "float" ) );
assertEquals( double.class, ClassUtils.getClass( "double" ) );
assertEquals( boolean.class, ClassUtils.getClass( "boolean" ) );
assertEquals( void.class, ClassUtils.getClass( "void" ) );
}
@Test
public void testGetClassWithArrayClasses() throws Exception {
assertGetClassReturnsClass( String[].class );
assertGetClassReturnsClass( int[].class );
assertGetClassReturnsClass( long[].class );
assertGetClassReturnsClass( short[].class );
assertGetClassReturnsClass( byte[].class );
assertGetClassReturnsClass( char[].class );
assertGetClassReturnsClass( float[].class );
assertGetClassReturnsClass( double[].class );
assertGetClassReturnsClass( boolean[].class );
}
@Test
public void testGetClassWithArrayClasses2D() throws Exception {
assertGetClassReturnsClass( String[][].class );
assertGetClassReturnsClass( int[][].class );
assertGetClassReturnsClass( long[][].class );
assertGetClassReturnsClass( short[][].class );
assertGetClassReturnsClass( byte[][].class );
assertGetClassReturnsClass( char[][].class );
assertGetClassReturnsClass( float[][].class );
assertGetClassReturnsClass( double[][].class );
assertGetClassReturnsClass( boolean[][].class );
}
@Test
public void testGetComponentType() {
final CX[] newArray = {};
@SuppressWarnings("unchecked")
final Class<CX[]> classCxArray = (Class<CX[]>) newArray.getClass();
// No type-cast required.
final Class<CX> componentType = ClassUtils.getComponentType(classCxArray);
assertEquals(CX.class, componentType);
assertNull(ClassUtils.getComponentType(null));
}
@Test
public void testGetInnerClass() throws ClassNotFoundException {
assertEquals( Inner.DeeplyNested.class, ClassUtils.getClass( "org.apache.commons.lang3.ClassUtilsTest.Inner.DeeplyNested" ) );
assertEquals( Inner.DeeplyNested.class, ClassUtils.getClass( "org.apache.commons.lang3.ClassUtilsTest.Inner$DeeplyNested" ) );
assertEquals( Inner.DeeplyNested.class, ClassUtils.getClass( "org.apache.commons.lang3.ClassUtilsTest$Inner$DeeplyNested" ) );
assertEquals( Inner.DeeplyNested.class, ClassUtils.getClass( "org.apache.commons.lang3.ClassUtilsTest$Inner.DeeplyNested" ) );
}
@Test
public void testGetPublicMethod() throws Exception {
// Tests with Collections$UnmodifiableSet
final Set<?> set = Collections.unmodifiableSet(new HashSet<>());
final Method isEmptyMethod = ClassUtils.getPublicMethod(set.getClass(), "isEmpty");
assertTrue(Modifier.isPublic(isEmptyMethod.getDeclaringClass().getModifiers()));
assertTrue((Boolean) isEmptyMethod.invoke(set));
// Tests with a public Class
final Method toStringMethod = ClassUtils.getPublicMethod(Object.class, "toString");
assertEquals(Object.class.getMethod("toString"), toStringMethod);
}
@Test
public void testHierarchyExcludingInterfaces() {
final Iterator<Class<?>> iter = ClassUtils.hierarchy(StringParameterizedChild.class).iterator();
assertEquals(StringParameterizedChild.class, iter.next());
assertEquals(GenericParent.class, iter.next());
assertEquals(Object.class, iter.next());
assertFalse(iter.hasNext());
}
@Test
public void testHierarchyIncludingInterfaces() {
final Iterator<Class<?>> iter =
ClassUtils.hierarchy(StringParameterizedChild.class, Interfaces.INCLUDE).iterator();
assertEquals(StringParameterizedChild.class, iter.next());
assertEquals(GenericParent.class, iter.next());
assertEquals(GenericConsumer.class, iter.next());
assertEquals(Object.class, iter.next());
assertFalse(iter.hasNext());
}
@Test
public void testIsPrimitiveOrWrapper() {
// test primitive wrapper classes
assertTrue(ClassUtils.isPrimitiveOrWrapper(Boolean.class), "Boolean.class");
assertTrue(ClassUtils.isPrimitiveOrWrapper(Byte.class), "Byte.class");
assertTrue(ClassUtils.isPrimitiveOrWrapper(Character.class), "Character.class");
assertTrue(ClassUtils.isPrimitiveOrWrapper(Short.class), "Short.class");
assertTrue(ClassUtils.isPrimitiveOrWrapper(Integer.class), "Integer.class");
assertTrue(ClassUtils.isPrimitiveOrWrapper(Long.class), "Long.class");
assertTrue(ClassUtils.isPrimitiveOrWrapper(Double.class), "Double.class");
assertTrue(ClassUtils.isPrimitiveOrWrapper(Float.class), "Float.class");
// test primitive classes
assertTrue(ClassUtils.isPrimitiveOrWrapper(Boolean.TYPE), "boolean");
assertTrue(ClassUtils.isPrimitiveOrWrapper(Byte.TYPE), "byte");
assertTrue(ClassUtils.isPrimitiveOrWrapper(Character.TYPE), "char");
assertTrue(ClassUtils.isPrimitiveOrWrapper(Short.TYPE), "short");
assertTrue(ClassUtils.isPrimitiveOrWrapper(Integer.TYPE), "int");
assertTrue(ClassUtils.isPrimitiveOrWrapper(Long.TYPE), "long");
assertTrue(ClassUtils.isPrimitiveOrWrapper(Double.TYPE), "double");
assertTrue(ClassUtils.isPrimitiveOrWrapper(Float.TYPE), "float");
assertTrue(ClassUtils.isPrimitiveOrWrapper(Void.TYPE), "Void.TYPE");
// others
assertFalse(ClassUtils.isPrimitiveOrWrapper(null), "null");
assertFalse(ClassUtils.isPrimitiveOrWrapper(Void.class), "Void.class");
assertFalse(ClassUtils.isPrimitiveOrWrapper(String.class), "String.class");
assertFalse(ClassUtils.isPrimitiveOrWrapper(this.getClass()), "this.getClass()");
}
@Test
public void testIsPrimitiveWrapper() {
// test primitive wrapper classes
assertTrue(ClassUtils.isPrimitiveWrapper(Boolean.class), "Boolean.class");
assertTrue(ClassUtils.isPrimitiveWrapper(Byte.class), "Byte.class");
assertTrue(ClassUtils.isPrimitiveWrapper(Character.class), "Character.class");
assertTrue(ClassUtils.isPrimitiveWrapper(Short.class), "Short.class");
assertTrue(ClassUtils.isPrimitiveWrapper(Integer.class), "Integer.class");
assertTrue(ClassUtils.isPrimitiveWrapper(Long.class), "Long.class");
assertTrue(ClassUtils.isPrimitiveWrapper(Double.class), "Double.class");
assertTrue(ClassUtils.isPrimitiveWrapper(Float.class), "Float.class");
// test primitive classes
assertFalse(ClassUtils.isPrimitiveWrapper(Boolean.TYPE), "boolean");
assertFalse(ClassUtils.isPrimitiveWrapper(Byte.TYPE), "byte");
assertFalse(ClassUtils.isPrimitiveWrapper(Character.TYPE), "char");
assertFalse(ClassUtils.isPrimitiveWrapper(Short.TYPE), "short");
assertFalse(ClassUtils.isPrimitiveWrapper(Integer.TYPE), "int");
assertFalse(ClassUtils.isPrimitiveWrapper(Long.TYPE), "long");
assertFalse(ClassUtils.isPrimitiveWrapper(Double.TYPE), "double");
assertFalse(ClassUtils.isPrimitiveWrapper(Float.TYPE), "float");
// others
assertFalse(ClassUtils.isPrimitiveWrapper(null), "null");
assertFalse(ClassUtils.isPrimitiveWrapper(Void.class), "Void.class");
assertFalse(ClassUtils.isPrimitiveWrapper(Void.TYPE), "Void.TYPE");
assertFalse(ClassUtils.isPrimitiveWrapper(String.class), "String.class");
assertFalse(ClassUtils.isPrimitiveWrapper(this.getClass()), "this.getClass()");
}
@Test
public void testPrimitivesToWrappers() {
// test null
// assertNull("null -> null", ClassUtils.primitivesToWrappers(null)); // generates warning
assertNull(ClassUtils.primitivesToWrappers((Class<?>[]) null), "null -> null"); // equivalent cast to avoid warning
// Other possible casts for null
assertArrayEquals(ArrayUtils.EMPTY_CLASS_ARRAY, ClassUtils.primitivesToWrappers(), "empty -> empty");
final Class<?>[] castNull = ClassUtils.primitivesToWrappers((Class<?>) null); // == new Class<?>[]{null}
assertArrayEquals(new Class<?>[]{null}, castNull, "(Class<?>) null -> [null]");
// test empty array is returned unchanged
assertArrayEquals(ArrayUtils.EMPTY_CLASS_ARRAY, ClassUtils.primitivesToWrappers(ArrayUtils.EMPTY_CLASS_ARRAY),
"empty -> empty");
// test an array of various classes
final Class<?>[] primitives = new Class[] {
Boolean.TYPE, Byte.TYPE, Character.TYPE, Short.TYPE,
Integer.TYPE, Long.TYPE, Double.TYPE, Float.TYPE,
String.class, ClassUtils.class
};
final Class<?>[] wrappers= ClassUtils.primitivesToWrappers(primitives);
for (int i=0; i < primitives.length; i++) {
// test each returned wrapper
final Class<?> primitive = primitives[i];
final Class<?> expectedWrapper = ClassUtils.primitiveToWrapper(primitive);
assertEquals(expectedWrapper, wrappers[i], primitive + " -> " + expectedWrapper);
}
// test an array of no primitive classes
final Class<?>[] noPrimitives = new Class[] {
String.class, ClassUtils.class, Void.TYPE
};
// This used to return the exact same array, but no longer does.
assertNotSame(noPrimitives, ClassUtils.primitivesToWrappers(noPrimitives), "unmodified");
}
@Test
public void testPrimitiveToWrapper() {
// test primitive classes
assertEquals(Boolean.class, ClassUtils.primitiveToWrapper(Boolean.TYPE), "boolean -> Boolean.class");
assertEquals(Byte.class, ClassUtils.primitiveToWrapper(Byte.TYPE), "byte -> Byte.class");
assertEquals(Character.class, ClassUtils.primitiveToWrapper(Character.TYPE), "char -> Character.class");
assertEquals(Short.class, ClassUtils.primitiveToWrapper(Short.TYPE), "short -> Short.class");
assertEquals(Integer.class, ClassUtils.primitiveToWrapper(Integer.TYPE), "int -> Integer.class");
assertEquals(Long.class, ClassUtils.primitiveToWrapper(Long.TYPE), "long -> Long.class");
assertEquals(Double.class, ClassUtils.primitiveToWrapper(Double.TYPE), "double -> Double.class");
assertEquals(Float.class, ClassUtils.primitiveToWrapper(Float.TYPE), "float -> Float.class");
// test a few other classes
assertEquals(String.class, ClassUtils.primitiveToWrapper(String.class), "String.class -> String.class");
assertEquals(ClassUtils.class, ClassUtils.primitiveToWrapper(ClassUtils.class),
"ClassUtils.class -> ClassUtils.class");
assertEquals(Void.TYPE, ClassUtils.primitiveToWrapper(Void.TYPE), "Void.TYPE -> Void.TYPE");
// test null
assertNull(ClassUtils.primitiveToWrapper(null), "null -> null");
}
// Show the Java bug: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4071957
// We may have to delete this if a JDK fixes the bug.
@Test
public void testShowJavaBug() throws Exception {
// Tests with Collections$UnmodifiableSet
final Set<?> set = Collections.unmodifiableSet(new HashSet<>());
final Method isEmptyMethod = set.getClass().getMethod("isEmpty");
assertThrows(IllegalAccessException.class, () -> isEmptyMethod.invoke(set));
}
@Test
public void testToClass_object() {
// assertNull(ClassUtils.toClass(null)); // generates warning
assertNull(ClassUtils.toClass((Object[]) null)); // equivalent explicit cast
// Additional varargs tests
assertArrayEquals(ArrayUtils.EMPTY_CLASS_ARRAY, ClassUtils.toClass(), "empty -> empty");
final Class<?>[] castNull = ClassUtils.toClass((Object) null); // == new Object[]{null}
assertArrayEquals(new Object[]{null}, castNull, "(Object) null -> [null]");
assertSame(ArrayUtils.EMPTY_CLASS_ARRAY, ClassUtils.toClass(ArrayUtils.EMPTY_OBJECT_ARRAY));
assertArrayEquals(new Class[]{String.class, Integer.class, Double.class}, ClassUtils.toClass("Test", Integer.valueOf(1), Double.valueOf(99d)));
assertArrayEquals(new Class[]{String.class, null, Double.class}, ClassUtils.toClass("Test", null, Double.valueOf(99d)));
}
@Test
public void testWithInterleavingWhitespace() throws ClassNotFoundException {
assertEquals( int[].class, ClassUtils.getClass( " int [ ] " ) );
assertEquals( long[].class, ClassUtils.getClass( "\rlong\t[\n]\r" ) );
assertEquals( short[].class, ClassUtils.getClass( "\tshort \t\t[]" ) );
assertEquals( byte[].class, ClassUtils.getClass( "byte[\t\t\n\r] " ) );
}
@Test
public void testWrappersToPrimitives() {
// an array with classes to test
final Class<?>[] classes = {
Boolean.class, Byte.class, Character.class, Short.class,
Integer.class, Long.class, Float.class, Double.class,
String.class, ClassUtils.class, null
};
final Class<?>[] primitives = ClassUtils.wrappersToPrimitives(classes);
// now test the result
assertEquals(classes.length, primitives.length, "Wrong length of result array");
for (int i = 0; i < classes.length; i++) {
final Class<?> expectedPrimitive = ClassUtils.wrapperToPrimitive(classes[i]);
assertEquals(expectedPrimitive, primitives[i], classes[i] + " -> " + expectedPrimitive);
}
}
@Test
public void testWrappersToPrimitivesEmpty() {
final Class<?>[] empty = new Class[0];
assertArrayEquals(empty, ClassUtils.wrappersToPrimitives(empty), "Wrong result for empty input");
}
@Test
public void testWrappersToPrimitivesNull() {
// assertNull("Wrong result for null input", ClassUtils.wrappersToPrimitives(null)); // generates warning
assertNull(ClassUtils.wrappersToPrimitives((Class<?>[]) null), "Wrong result for null input"); // equivalent cast
// Other possible casts for null
assertArrayEquals(ArrayUtils.EMPTY_CLASS_ARRAY, ClassUtils.wrappersToPrimitives(), "empty -> empty");
final Class<?>[] castNull = ClassUtils.wrappersToPrimitives((Class<?>) null); // == new Class<?>[]{null}
assertArrayEquals(new Class<?>[]{null}, castNull, "(Class<?>) null -> [null]");
}
@Test
public void testWrapperToPrimitive() {
// an array with classes to convert
final Class<?>[] primitives = {
Boolean.TYPE, Byte.TYPE, Character.TYPE, Short.TYPE,
Integer.TYPE, Long.TYPE, Float.TYPE, Double.TYPE
};
for (final Class<?> primitive : primitives) {
final Class<?> wrapperCls = ClassUtils.primitiveToWrapper(primitive);
assertFalse(wrapperCls.isPrimitive(), "Still primitive");
assertEquals(primitive, ClassUtils.wrapperToPrimitive(wrapperCls), wrapperCls + " -> " + primitive);
}
}
@Test
public void testWrapperToPrimitiveNoWrapper() {
assertNull(ClassUtils.wrapperToPrimitive(String.class), "Wrong result for non wrapper class");
}
@Test
public void testWrapperToPrimitiveNull() {
assertNull(ClassUtils.wrapperToPrimitive(null), "Wrong result for null class");
}
}