| /* |
| * 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.harmony.testframework; |
| |
| import junit.framework.Assert; |
| import junit.framework.TestCase; |
| import junit.framework.TestSuite; |
| |
| import java.io.IOException; |
| import java.io.Writer; |
| import java.util.Arrays; |
| import java.util.Random; |
| |
| /** |
| * Tests behaviour common to all implementations of {@link Writer}. This adapts |
| * writers that collects untransformed chars so that they may be tested. |
| */ |
| public abstract class CharSinkTester { |
| |
| private boolean throwsExceptions = true; |
| |
| /** |
| * Creates a new writer ready to receive an arbitrary number of chars. Each |
| * time this method is invoked, any previously returned writers may be |
| * discarded. |
| */ |
| public abstract Writer create() throws Exception; |
| |
| /** |
| * Returns the current set of chars written to the writer last returned by |
| * {@link #create}, and releases any resources held by that writer. |
| */ |
| public abstract char[] getChars() throws Exception; |
| |
| /** |
| * Configures whether the writer is expected to throw exceptions when an |
| * error is encountered. Classes like {@code PrintWriter} report errors via |
| * an API method instead. |
| */ |
| public CharSinkTester setThrowsExceptions(boolean throwsExceptions) { |
| this.throwsExceptions = throwsExceptions; |
| return this; |
| } |
| |
| public final TestSuite createTests() { |
| TestSuite result = new TestSuite(); |
| result.addTest(new SinkTestCase("sinkTestNoWriting")); |
| result.addTest(new SinkTestCase("sinkTestWriteZeroChars")); |
| result.addTest(new SinkTestCase("sinkTestWriteCharByChar")); |
| result.addTest(new SinkTestCase("sinkTestWriteArray")); |
| result.addTest(new SinkTestCase("sinkTestWriteOffset")); |
| result.addTest(new SinkTestCase("sinkTestWriteLargeArray")); |
| |
| if (throwsExceptions) { |
| result.addTest(new SinkTestCase("sinkTestWriteAfterClose")); |
| } else { |
| result.addTest(new SinkTestCase("sinkTestWriteAfterCloseSuppressed")); |
| } |
| |
| return result; |
| } |
| |
| @Override |
| public String toString() { |
| return getClass().getName(); |
| } |
| |
| private static void assertArrayEquals(char[] expected, char[] actual) { |
| Assert.assertEquals(Arrays.toString(expected), Arrays.toString(actual)); |
| } |
| |
| public class SinkTestCase extends TestCase { |
| |
| private SinkTestCase(String name) { |
| super(name); |
| } |
| |
| public void sinkTestNoWriting() throws Exception { |
| char[] expected = new char[] { }; |
| |
| Writer out = create(); |
| out.close(); |
| assertArrayEquals(expected, getChars()); |
| } |
| |
| public void sinkTestWriteZeroChars() throws Exception { |
| char[] expected = new char[] { }; |
| |
| Writer out = create(); |
| char[] a = new char[1024]; |
| out.write(a, 1000, 0); |
| out.write(a, 0, 0); |
| out.write(new char[] { }); |
| |
| out.close(); |
| assertArrayEquals(expected, getChars()); |
| } |
| |
| public void sinkTestWriteCharByChar() throws Exception { |
| char[] expected = "EFGCDECBA".toCharArray(); |
| |
| Writer out = create(); |
| for (char c : expected) { |
| out.write(c); |
| } |
| |
| out.close(); |
| assertArrayEquals(expected, getChars()); |
| } |
| |
| public void sinkTestWriteArray() throws Exception { |
| char[] expected = "EFGCDECBA".toCharArray(); |
| |
| Writer out = create(); |
| |
| out.write("EF".toCharArray()); |
| out.write("GCDE".toCharArray()); |
| out.write("CBA".toCharArray()); |
| |
| out.close(); |
| assertArrayEquals(expected, getChars()); |
| } |
| |
| public void sinkTestWriteOffset() throws Exception { |
| char[] expected = "EFGCDECBA".toCharArray(); |
| Writer out = create(); |
| |
| char[] a = new char[1024]; |
| a[1000] = 'E'; |
| a[1001] = 'F'; |
| out.write(a, 1000, 2); |
| |
| char[] b = new char[1024]; |
| b[1020] = 'G'; |
| b[1021] = 'C'; |
| b[1022] = 'D'; |
| b[1023] = 'E'; |
| out.write(b, 1020, 4); |
| |
| char[] c = new char[1024]; |
| c[0] = 'C'; |
| c[1] = 'B'; |
| c[2] = 'A'; |
| out.write(c, 0, 3); |
| |
| out.close(); |
| assertArrayEquals(expected, getChars()); |
| } |
| |
| public void sinkTestWriteLargeArray() throws Exception { |
| Random dice = new Random(); |
| char[] expected = new char[(1024 * 1024) + 1]; // 2 MB + 1 char |
| for (int c = 0; c < expected.length; c++) { |
| expected[c] = (char) ('A' + dice.nextInt(26)); |
| } |
| |
| Writer out = create(); |
| out.write(expected); |
| out.close(); |
| |
| assertArrayEquals(expected, getChars()); |
| } |
| |
| public void sinkTestWriteAfterClose() throws Exception { |
| char[] expectedChars = "EF".toCharArray(); |
| Writer out = create(); |
| |
| out.write(expectedChars); |
| out.close(); |
| |
| try { |
| out.write("GCDE".toCharArray()); |
| fail("expected already closed exception"); |
| } catch (IOException expected) { |
| } |
| |
| assertArrayEquals(expectedChars, getChars()); |
| } |
| |
| public void sinkTestWriteAfterCloseSuppressed() throws Exception { |
| Writer out = create(); |
| out.write("EF".toCharArray()); |
| out.close(); |
| out.write("GCDE".toCharArray()); // no exception expected! |
| } |
| |
| // adding a new test? Don't forget to update createTests(). |
| |
| @Override |
| public String getName() { |
| return CharSinkTester.this.toString() + ":" + super.getName(); |
| } |
| } |
| } |