| /* |
| * 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.io.input; |
| |
| import static org.junit.jupiter.api.Assertions.assertEquals; |
| import static org.junit.jupiter.api.Assertions.assertFalse; |
| import static org.junit.jupiter.api.Assertions.assertThrows; |
| import static org.junit.jupiter.api.Assertions.assertTrue; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.ObjectInputStream; |
| import java.io.ObjectOutputStream; |
| import java.io.Reader; |
| import java.nio.CharBuffer; |
| import java.util.Arrays; |
| |
| import org.apache.commons.io.TestResources; |
| import org.junit.jupiter.api.Test; |
| |
| /** |
| * Test case for {@link CharSequenceReader}. |
| * |
| */ |
| public class CharSequenceReaderTest { |
| private static final char NONE = (new char[1])[0]; |
| |
| @Test |
| public void testClose() throws IOException { |
| final Reader reader = new CharSequenceReader("FooBar"); |
| checkRead(reader, "Foo"); |
| reader.close(); |
| checkRead(reader, "Foo"); |
| |
| final Reader subReader = new CharSequenceReader("xFooBarx", 1, 7); |
| checkRead(subReader, "Foo"); |
| subReader.close(); |
| checkRead(subReader, "Foo"); |
| } |
| |
| @Test |
| public void testReady() throws IOException { |
| final Reader reader = new CharSequenceReader("FooBar"); |
| assertTrue(reader.ready()); |
| reader.skip(3); |
| assertTrue(reader.ready()); |
| checkRead(reader, "Bar"); |
| assertFalse(reader.ready()); |
| reader.reset(); |
| assertTrue(reader.ready()); |
| reader.skip(2); |
| assertTrue(reader.ready()); |
| reader.skip(10); |
| assertFalse(reader.ready()); |
| reader.close(); |
| assertTrue(reader.ready()); |
| reader.skip(20); |
| assertFalse(reader.ready()); |
| |
| final Reader subReader = new CharSequenceReader("xFooBarx", 1, 7); |
| assertTrue(subReader.ready()); |
| subReader.skip(3); |
| assertTrue(subReader.ready()); |
| checkRead(subReader, "Bar"); |
| assertFalse(subReader.ready()); |
| subReader.reset(); |
| assertTrue(subReader.ready()); |
| subReader.skip(2); |
| assertTrue(subReader.ready()); |
| subReader.skip(10); |
| assertFalse(subReader.ready()); |
| subReader.close(); |
| assertTrue(subReader.ready()); |
| subReader.skip(20); |
| assertFalse(subReader.ready()); |
| } |
| |
| @Test |
| public void testMarkSupported() throws Exception { |
| try (final Reader reader = new CharSequenceReader("FooBar")) { |
| assertTrue(reader.markSupported()); |
| } |
| } |
| |
| @Test |
| public void testMark() throws IOException { |
| try (final Reader reader = new CharSequenceReader("FooBar")) { |
| checkRead(reader, "Foo"); |
| reader.mark(0); |
| checkRead(reader, "Bar"); |
| reader.reset(); |
| checkRead(reader, "Bar"); |
| reader.close(); |
| checkRead(reader, "Foo"); |
| reader.reset(); |
| checkRead(reader, "Foo"); |
| } |
| try (final Reader subReader = new CharSequenceReader("xFooBarx", 1, 7)) { |
| checkRead(subReader, "Foo"); |
| subReader.mark(0); |
| checkRead(subReader, "Bar"); |
| subReader.reset(); |
| checkRead(subReader, "Bar"); |
| subReader.close(); |
| checkRead(subReader, "Foo"); |
| subReader.reset(); |
| checkRead(subReader, "Foo"); |
| } |
| } |
| |
| @Test |
| public void testSkip() throws IOException { |
| final Reader reader = new CharSequenceReader("FooBar"); |
| assertEquals(3, reader.skip(3)); |
| checkRead(reader, "Bar"); |
| assertEquals(0, reader.skip(3)); |
| reader.reset(); |
| assertEquals(2, reader.skip(2)); |
| assertEquals(4, reader.skip(10)); |
| assertEquals(0, reader.skip(1)); |
| reader.close(); |
| assertEquals(6, reader.skip(20)); |
| assertEquals(-1, reader.read()); |
| |
| final Reader subReader = new CharSequenceReader("xFooBarx", 1, 7); |
| assertEquals(3, subReader.skip(3)); |
| checkRead(subReader, "Bar"); |
| assertEquals(0, subReader.skip(3)); |
| subReader.reset(); |
| assertEquals(2, subReader.skip(2)); |
| assertEquals(4, subReader.skip(10)); |
| assertEquals(0, subReader.skip(1)); |
| subReader.close(); |
| assertEquals(6, subReader.skip(20)); |
| assertEquals(-1, subReader.read()); |
| } |
| |
| @Test |
| public void testRead() throws IOException { |
| final String value = "Foo"; |
| testRead(value); |
| testRead(new StringBuilder(value)); |
| testRead(new StringBuffer(value)); |
| testRead(CharBuffer.wrap(value)); |
| } |
| |
| private void testRead(final CharSequence charSequence) throws IOException { |
| try (final Reader reader = new CharSequenceReader(charSequence)) { |
| assertEquals('F', reader.read()); |
| assertEquals('o', reader.read()); |
| assertEquals('o', reader.read()); |
| assertEquals(-1, reader.read()); |
| assertEquals(-1, reader.read()); |
| } |
| try (final Reader reader = new CharSequenceReader(charSequence, 1, 5)) { |
| assertEquals('o', reader.read()); |
| assertEquals('o', reader.read()); |
| assertEquals(-1, reader.read()); |
| assertEquals(-1, reader.read()); |
| } |
| } |
| |
| @Test |
| public void testReadCharArray() throws IOException { |
| final String value = "FooBar"; |
| testReadCharArray(value); |
| testReadCharArray(new StringBuilder(value)); |
| testReadCharArray(new StringBuffer(value)); |
| testReadCharArray(CharBuffer.wrap(value)); |
| } |
| |
| private void testReadCharArray(final CharSequence charSequence) throws IOException { |
| try (final Reader reader = new CharSequenceReader(charSequence)) { |
| char[] chars = new char[2]; |
| assertEquals(2, reader.read(chars)); |
| checkArray(new char[] { 'F', 'o' }, chars); |
| chars = new char[3]; |
| assertEquals(3, reader.read(chars)); |
| checkArray(new char[] { 'o', 'B', 'a' }, chars); |
| chars = new char[3]; |
| assertEquals(1, reader.read(chars)); |
| checkArray(new char[] { 'r', NONE, NONE }, chars); |
| assertEquals(-1, reader.read(chars)); |
| } |
| try (final Reader reader = new CharSequenceReader(charSequence, 1, 5)) { |
| char[] chars = new char[2]; |
| assertEquals(2, reader.read(chars)); |
| checkArray(new char[] { 'o', 'o' }, chars); |
| chars = new char[3]; |
| assertEquals(2, reader.read(chars)); |
| checkArray(new char[] { 'B', 'a', NONE }, chars); |
| chars = new char[3]; |
| assertEquals(-1, reader.read(chars)); |
| checkArray(new char[] { NONE, NONE, NONE }, chars); |
| assertEquals(-1, reader.read(chars)); |
| } |
| } |
| |
| @Test |
| public void testReadCharArrayPortion() throws IOException { |
| final String value = "FooBar"; |
| testReadCharArrayPortion(value); |
| testReadCharArrayPortion(new StringBuilder(value)); |
| testReadCharArrayPortion(new StringBuffer(value)); |
| testReadCharArrayPortion(CharBuffer.wrap(value)); |
| } |
| |
| private void testReadCharArrayPortion(final CharSequence charSequence) throws IOException { |
| final char[] chars = new char[10]; |
| try (final Reader reader = new CharSequenceReader(charSequence)) { |
| assertEquals(3, reader.read(chars, 3, 3)); |
| checkArray(new char[] { NONE, NONE, NONE, 'F', 'o', 'o' }, chars); |
| assertEquals(3, reader.read(chars, 0, 3)); |
| checkArray(new char[] { 'B', 'a', 'r', 'F', 'o', 'o', NONE }, chars); |
| assertEquals(-1, reader.read(chars)); |
| } |
| Arrays.fill(chars, NONE); |
| try (final Reader reader = new CharSequenceReader(charSequence, 1, 5)) { |
| assertEquals(2, reader.read(chars, 3, 2)); |
| checkArray(new char[] { NONE, NONE, NONE, 'o', 'o', NONE }, chars); |
| assertEquals(2, reader.read(chars, 0, 3)); |
| checkArray(new char[] { 'B', 'a', NONE, 'o', 'o', NONE }, chars); |
| assertEquals(-1, reader.read(chars)); |
| } |
| } |
| |
| private void checkRead(final Reader reader, final String expected) throws IOException { |
| for (int i = 0; i < expected.length(); i++) { |
| assertEquals(expected.charAt(i), (char)reader.read(), "Read[" + i + "] of '" + expected + "'"); |
| } |
| } |
| |
| private void checkArray(final char[] expected, final char[] actual) { |
| for (int i = 0; i < expected.length; i++) { |
| assertEquals(expected[i], actual[i], "Compare[" +i + "]"); |
| } |
| } |
| |
| @Test |
| public void testConstructor() { |
| assertThrows(IllegalArgumentException.class, () -> new CharSequenceReader("FooBar", -1, 6), |
| "Expected exception not thrown for negative start."); |
| assertThrows(IllegalArgumentException.class, () -> new CharSequenceReader("FooBar", 1, 0), |
| "Expected exception not thrown for end before start."); |
| } |
| |
| @Test |
| @SuppressWarnings("resource") // don't really need to close CharSequenceReader here |
| public void testToString() { |
| assertEquals("FooBar", new CharSequenceReader("FooBar").toString()); |
| assertEquals("FooBar", new CharSequenceReader("xFooBarx", 1, 7).toString()); |
| } |
| |
| @Test |
| public void testSerialization() throws IOException, ClassNotFoundException { |
| /* |
| * File CharSequenceReader.bin contains a CharSequenceReader that was serialized before |
| * the start and end fields were added. Its CharSequence is "FooBar". |
| * This part of the test will test that adding the fields does not break any existing |
| * serialized CharSequenceReaders. |
| */ |
| try (ObjectInputStream ois = new ObjectInputStream(TestResources.getInputStream("CharSequenceReader.bin"))) { |
| final CharSequenceReader reader = (CharSequenceReader) ois.readObject(); |
| assertEquals('F', reader.read()); |
| assertEquals('o', reader.read()); |
| assertEquals('o', reader.read()); |
| assertEquals('B', reader.read()); |
| assertEquals('a', reader.read()); |
| assertEquals('r', reader.read()); |
| assertEquals(-1, reader.read()); |
| assertEquals(-1, reader.read()); |
| } |
| |
| final ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| try (ObjectOutputStream oos = new ObjectOutputStream(baos)) { |
| final CharSequenceReader reader = new CharSequenceReader("xFooBarx", 1, 7); |
| oos.writeObject(reader); |
| } |
| try (ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(baos.toByteArray()))) { |
| final CharSequenceReader reader = (CharSequenceReader) ois.readObject(); |
| assertEquals('F', reader.read()); |
| assertEquals('o', reader.read()); |
| assertEquals('o', reader.read()); |
| assertEquals('B', reader.read()); |
| assertEquals('a', reader.read()); |
| assertEquals('r', reader.read()); |
| assertEquals(-1, reader.read()); |
| assertEquals(-1, reader.read()); |
| reader.reset(); |
| assertEquals('F', reader.read()); |
| assertEquals('o', reader.read()); |
| assertEquals('o', reader.read()); |
| assertEquals('B', reader.read()); |
| assertEquals('a', reader.read()); |
| assertEquals('r', reader.read()); |
| assertEquals(-1, reader.read()); |
| assertEquals(-1, reader.read()); |
| } |
| } |
| } |