| /* |
| * 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 java.io.IOException; |
| import java.io.Reader; |
| import java.io.StringReader; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.List; |
| |
| import org.apache.commons.lang3.StringUtils; |
| import org.junit.jupiter.api.Test; |
| |
| /** |
| * Test case for {@link SequenceReader}. |
| */ |
| public class SequenceReaderTest { |
| |
| private static final char NUL = 0; |
| |
| private void checkArray(final char[] expected, final char[] actual) { |
| for (int i = 0; i < expected.length; i++) { |
| assertEquals(expected[i], actual[i], "Compare[" + i + "]"); |
| } |
| } |
| |
| 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 checkReadEof(final Reader reader) throws IOException { |
| for (int i = 0; i < 10; i++) { |
| assertEquals(-1, reader.read()); |
| } |
| } |
| |
| @Test |
| public void testClose() throws IOException { |
| try (final Reader reader = new SequenceReader(new CharSequenceReader("FooBar"))) { |
| checkRead(reader, "Foo"); |
| reader.close(); |
| checkReadEof(reader); |
| } |
| } |
| |
| @Test |
| public void testReadClosedReader() throws IOException { |
| @SuppressWarnings("resource") |
| final Reader reader = new SequenceReader(new CharSequenceReader("FooBar")); |
| reader.close(); |
| checkReadEof(reader); |
| } |
| |
| @Test |
| public void testMarkSupported() throws Exception { |
| try (final Reader reader = new SequenceReader()) { |
| assertFalse(reader.markSupported()); |
| } |
| } |
| |
| @Test |
| public void testRead() throws IOException { |
| try (final Reader reader = new SequenceReader(new StringReader("Foo"), new StringReader("Bar"))) { |
| assertEquals('F', reader.read()); |
| assertEquals('o', reader.read()); |
| assertEquals('o', reader.read()); |
| assertEquals('B', reader.read()); |
| assertEquals('a', reader.read()); |
| assertEquals('r', reader.read()); |
| checkReadEof(reader); |
| } |
| } |
| |
| @Test |
| public void testReadCharArray() throws IOException { |
| try (final Reader reader = new SequenceReader(new StringReader("Foo"), new StringReader("Bar"))) { |
| 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', NUL, NUL }, chars); |
| assertEquals(-1, reader.read(chars)); |
| } |
| } |
| |
| @Test |
| public void testReadCharArrayPortion() throws IOException { |
| final char[] chars = new char[10]; |
| try (final Reader reader = new SequenceReader(new StringReader("Foo"), new StringReader("Bar"))) { |
| assertEquals(3, reader.read(chars, 3, 3)); |
| checkArray(new char[] { NUL, NUL, NUL, 'F', 'o', 'o' }, chars); |
| assertEquals(3, reader.read(chars, 0, 3)); |
| checkArray(new char[] { 'B', 'a', 'r', 'F', 'o', 'o', NUL }, chars); |
| assertEquals(-1, reader.read(chars)); |
| assertThrows(IndexOutOfBoundsException.class, () -> reader.read(chars, 10, 10)); |
| assertThrows(NullPointerException.class, () -> reader.read(null, 0, 10)); |
| } |
| } |
| |
| @Test |
| public void testReadCollection() throws IOException { |
| final Collection<Reader> readers = new ArrayList<>(); |
| readers.add(new StringReader("F")); |
| readers.add(new StringReader("B")); |
| try (final Reader reader = new SequenceReader(readers)) { |
| assertEquals('F', reader.read()); |
| assertEquals('B', reader.read()); |
| checkReadEof(reader); |
| } |
| } |
| |
| @Test |
| public void testReadIterable() throws IOException { |
| final Collection<Reader> readers = new ArrayList<>(); |
| readers.add(new StringReader("F")); |
| readers.add(new StringReader("B")); |
| final Iterable<Reader> iterable = readers; |
| try (final Reader reader = new SequenceReader(iterable)) { |
| assertEquals('F', reader.read()); |
| assertEquals('B', reader.read()); |
| checkReadEof(reader); |
| } |
| } |
| |
| @Test |
| public void testReadLength0Readers() throws IOException { |
| try (final Reader reader = new SequenceReader(new StringReader(StringUtils.EMPTY), |
| new StringReader(StringUtils.EMPTY), new StringReader(StringUtils.EMPTY))) { |
| checkReadEof(reader); |
| } |
| } |
| |
| @Test |
| public void testReadLength1Readers() throws IOException { |
| try (final Reader reader = new SequenceReader( |
| // @formatter:off |
| new StringReader("0"), |
| new StringReader("1"), |
| new StringReader("2"), |
| new StringReader("3"))) { |
| // @formatter:on |
| assertEquals('0', reader.read()); |
| assertEquals('1', reader.read()); |
| assertEquals('2', reader.read()); |
| assertEquals('3', reader.read()); |
| } |
| } |
| |
| @Test |
| public void testReadList() throws IOException { |
| final List<Reader> readers = new ArrayList<>(); |
| readers.add(new StringReader("F")); |
| readers.add(new StringReader("B")); |
| try (final Reader reader = new SequenceReader(readers)) { |
| assertEquals('F', reader.read()); |
| assertEquals('B', reader.read()); |
| checkReadEof(reader); |
| } |
| } |
| |
| @Test |
| public void testSkip() throws IOException { |
| try (final Reader reader = new SequenceReader(new StringReader("Foo"), new StringReader("Bar"))) { |
| assertEquals(3, reader.skip(3)); |
| checkRead(reader, "Bar"); |
| assertEquals(0, reader.skip(3)); |
| } |
| } |
| } |