| /* |
| * 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.samza.util; |
| |
| import com.google.common.collect.ImmutableList; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Objects; |
| import java.util.Set; |
| import org.apache.samza.SamzaException; |
| import org.junit.Test; |
| |
| import static org.junit.Assert.*; |
| |
| |
| public class TestReflectionUtil { |
| @Test |
| public void testGetObj() { |
| assertTrue(ReflectionUtil.getObj(ArrayList.class.getName(), List.class) instanceof ArrayList); |
| assertEquals(new ArrayList<>(), ReflectionUtil.getObj(ArrayList.class.getName(), List.class)); |
| } |
| |
| @Test(expected = SamzaException.class) |
| public void testGetObjNoClass() { |
| ReflectionUtil.getObj("not.a.class", Set.class); |
| } |
| |
| @Test(expected = SamzaException.class) |
| public void testGetObjInvalidConstructor() { |
| ReflectionUtil.getObj(WithTwoArgConstructor.class.getName(), Object.class); |
| } |
| |
| @Test |
| public void testGetObjWithArgs() { |
| assertEquals(new WithTwoArgConstructor("hello", ImmutableList.of("hello", "world")), |
| ReflectionUtil.getObjWithArgs(WithTwoArgConstructor.class.getName(), |
| WithTwoArgConstructor.class, |
| ReflectionUtil.constructorArgument("hello", String.class), |
| ReflectionUtil.constructorArgument(ImmutableList.of("hello", "world"), List.class))); |
| |
| // should still work if pass no args, since should use empty constructor |
| assertTrue(ReflectionUtil.getObjWithArgs(ArrayList.class.getName(), List.class) instanceof ArrayList); |
| assertEquals(new ArrayList<>(), ReflectionUtil.getObjWithArgs(ArrayList.class.getName(), List.class)); |
| } |
| |
| @Test(expected = SamzaException.class) |
| public void testGetObjWithArgsNoClass() { |
| ReflectionUtil.getObjWithArgs("not.a.class", Set.class, ReflectionUtil.constructorArgument(10, Integer.class)); |
| } |
| |
| @Test(expected = SamzaException.class) |
| public void testGetObjWithArgsWrongArgumentCount() { |
| ReflectionUtil.getObjWithArgs(WithTwoArgConstructor.class.getName(), Object.class, |
| ReflectionUtil.constructorArgument("hello world", String.class)); |
| } |
| |
| @Test(expected = SamzaException.class) |
| public void testGetObjWithArgsWrongArgumentTypes() { |
| ReflectionUtil.getObjWithArgs(WithTwoArgConstructor.class.getName(), |
| Object.class, |
| ReflectionUtil.constructorArgument("hello world", String.class), |
| ReflectionUtil.constructorArgument(ImmutableList.of("hello", "world"), ImmutableList.class)); |
| } |
| |
| @Test(expected = SamzaException.class) |
| public void testGetObjWithArgsZeroArgsNoClass() { |
| ReflectionUtil.getObjWithArgs("not.a.class", Set.class); |
| } |
| |
| @Test(expected = SamzaException.class) |
| public void testGetObjWithArgsZeroArgsInvalidConstructor() { |
| ReflectionUtil.getObjWithArgs(WithTwoArgConstructor.class.getName(), Object.class); |
| } |
| |
| private static class WithTwoArgConstructor { |
| private final String string; |
| private final List<String> list; |
| |
| WithTwoArgConstructor(String string, List<String> list) { |
| // just need some constructor so that there is no default constructor |
| this.string = string; |
| this.list = list; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (o == null || getClass() != o.getClass()) { |
| return false; |
| } |
| WithTwoArgConstructor that = (WithTwoArgConstructor) o; |
| return Objects.equals(string, that.string) && Objects.equals(list, that.list); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(string, list); |
| } |
| } |
| } |