1/* 2 * Copyright (C) 2012 The Guava Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.google.common.io; 18 19import static com.google.common.io.SourceSinkFactory.ByteSinkFactory; 20import static com.google.common.io.SourceSinkFactory.CharSinkFactory; 21import static org.junit.Assert.assertArrayEquals; 22 23import com.google.common.base.Charsets; 24import com.google.common.collect.ImmutableList; 25 26import junit.framework.TestSuite; 27 28import java.io.ByteArrayInputStream; 29import java.io.IOException; 30import java.io.OutputStream; 31import java.io.UnsupportedEncodingException; 32import java.lang.reflect.Method; 33import java.util.Map; 34 35/** 36 * A generator of {@code TestSuite} instances for testing {@code ByteSink} implementations. 37 * Generates tests of a all methods on a {@code ByteSink} given various inputs written to it as well 38 * as sub-suites for testing the {@code CharSink} view in the same way. 39 * 40 * @author Colin Decker 41 */ 42public class ByteSinkTester extends SourceSinkTester<ByteSink, byte[], ByteSinkFactory> { 43 44 private static final ImmutableList<Method> testMethods 45 = getTestMethods(ByteSinkTester.class); 46 47 static TestSuite tests(String name, ByteSinkFactory factory) { 48 TestSuite suite = new TestSuite(name); 49 for (Map.Entry<String, String> entry : TEST_STRINGS.entrySet()) { 50 String desc = entry.getKey(); 51 TestSuite stringSuite = suiteForString(name, factory, entry.getValue(), desc); 52 suite.addTest(stringSuite); 53 } 54 return suite; 55 } 56 57 private static TestSuite suiteForString(String name, ByteSinkFactory factory, 58 String string, String desc) { 59 byte[] bytes; 60 try { 61 bytes = string.getBytes(Charsets.UTF_8.name()); 62 } catch (UnsupportedEncodingException e) { 63 throw new AssertionError(e); 64 } 65 TestSuite suite = suiteForBytes(name, factory, desc, bytes); 66 CharSinkFactory charSinkFactory = SourceSinkFactories.asCharSinkFactory(factory); 67 suite.addTest(CharSinkTester.suiteForString(name + ".asCharSink[Charset]", charSinkFactory, 68 string, desc)); 69 return suite; 70 } 71 72 private static TestSuite suiteForBytes(String name, ByteSinkFactory factory, 73 String desc, byte[] bytes) { 74 TestSuite suite = new TestSuite(name + " [" + desc + "]"); 75 for (final Method method : testMethods) { 76 suite.addTest(new ByteSinkTester(factory, bytes, name, desc, method)); 77 } 78 return suite; 79 } 80 81 private ByteSink sink; 82 83 ByteSinkTester(ByteSinkFactory factory, byte[] data, String suiteName, 84 String caseDesc, Method method) { 85 super(factory, data, suiteName, caseDesc, method); 86 } 87 88 @Override 89 protected void setUp() throws Exception { 90 sink = factory.createSink(); 91 } 92 93 public void testOpenStream() throws IOException { 94 OutputStream out = sink.openStream(); 95 try { 96 ByteStreams.copy(new ByteArrayInputStream(data), out); 97 } finally { 98 out.close(); 99 } 100 101 assertContainsExpectedBytes(); 102 } 103 104 public void testOpenBufferedStream() throws IOException { 105 OutputStream out = sink.openBufferedStream(); 106 try { 107 ByteStreams.copy(new ByteArrayInputStream(data), out); 108 } finally { 109 out.close(); 110 } 111 112 assertContainsExpectedBytes(); 113 } 114 115 public void testWrite() throws IOException { 116 sink.write(data); 117 118 assertContainsExpectedBytes(); 119 } 120 121 public void testWriteFrom_inputStream() throws IOException { 122 sink.writeFrom(new ByteArrayInputStream(data)); 123 124 assertContainsExpectedBytes(); 125 } 126 127 private void assertContainsExpectedBytes() throws IOException { 128 assertArrayEquals(expected, factory.getSinkContents()); 129 } 130} 131