1 /* 2 * Copyright (C) 2008 The Android Open Source Project 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 17 package com.android.internal.os; 18 19 import androidx.test.filters.Suppress; 20 21 import junit.framework.TestCase; 22 23 import java.io.PrintWriter; 24 import java.io.StringWriter; 25 import java.util.ArrayList; 26 import java.util.Arrays; 27 import java.util.Collections; 28 import java.util.List; 29 30 // this test causes a IllegalAccessError: superclass not accessible 31 @Suppress 32 public class LoggingPrintStreamTest extends TestCase { 33 34 TestPrintStream out = new TestPrintStream(); 35 testPrintException()36 public void testPrintException() { 37 @SuppressWarnings("ThrowableInstanceNeverThrown") 38 Throwable t = new Throwable("Ignore me."); 39 40 StringWriter sout = new StringWriter(); 41 t.printStackTrace(new PrintWriter(sout)); 42 43 t.printStackTrace(out); 44 // t.printStackTrace(); 45 46 String[] lines = sout.toString().split("\\n"); 47 assertEquals(Arrays.asList(lines), out.lines); 48 } 49 testPrintObject()50 public void testPrintObject() { 51 Object o = new Object(); 52 out.print(4); 53 out.print(o); 54 out.print(2); 55 out.flush(); 56 assertEquals(Arrays.asList("4" + o + "2"), out.lines); 57 } 58 testPrintlnObject()59 public void testPrintlnObject() { 60 Object o = new Object(); 61 out.print(4); 62 out.println(o); 63 out.print(2); 64 out.flush(); 65 assertEquals(Arrays.asList("4" + o, "2"), out.lines); 66 } 67 testPrintf()68 public void testPrintf() { 69 out.printf("Name: %s\nEmployer: %s", "Bob", "Google"); 70 assertEquals(Arrays.asList("Name: Bob"), out.lines); 71 out.flush(); 72 assertEquals(Arrays.asList("Name: Bob", "Employer: Google"), out.lines); 73 } 74 testPrintInt()75 public void testPrintInt() { 76 out.print(4); 77 out.print(2); 78 assertTrue(out.lines.isEmpty()); 79 out.flush(); 80 assertEquals(Collections.singletonList("42"), out.lines); 81 } 82 testPrintlnInt()83 public void testPrintlnInt() { 84 out.println(4); 85 out.println(2); 86 assertEquals(Arrays.asList("4", "2"), out.lines); 87 } 88 testPrintCharArray()89 public void testPrintCharArray() { 90 out.print("Foo\nBar\nTee".toCharArray()); 91 assertEquals(Arrays.asList("Foo", "Bar"), out.lines); 92 out.flush(); 93 assertEquals(Arrays.asList("Foo", "Bar", "Tee"), out.lines); 94 } 95 testPrintString()96 public void testPrintString() { 97 out.print("Foo\nBar\nTee"); 98 assertEquals(Arrays.asList("Foo", "Bar"), out.lines); 99 out.flush(); 100 assertEquals(Arrays.asList("Foo", "Bar", "Tee"), out.lines); 101 } 102 testPrintlnCharArray()103 public void testPrintlnCharArray() { 104 out.println("Foo\nBar\nTee".toCharArray()); 105 assertEquals(Arrays.asList("Foo", "Bar", "Tee"), out.lines); 106 } 107 testPrintlnString()108 public void testPrintlnString() { 109 out.println("Foo\nBar\nTee"); 110 assertEquals(Arrays.asList("Foo", "Bar", "Tee"), out.lines); 111 } 112 testPrintlnStringWithBufferedData()113 public void testPrintlnStringWithBufferedData() { 114 out.print(5); 115 out.println("Foo\nBar\nTee"); 116 assertEquals(Arrays.asList("5Foo", "Bar", "Tee"), out.lines); 117 } 118 testAppend()119 public void testAppend() { 120 out.append("Foo\n") 121 .append('4') 122 .append('\n') 123 .append("Bar", 1, 2) 124 .append('\n'); 125 assertEquals(Arrays.asList("Foo", "4", "a"), out.lines); 126 } 127 testMultiByteCharactersSpanningBuffers()128 public void testMultiByteCharactersSpanningBuffers() throws Exception { 129 // assume 3*1000 bytes won't fit in LoggingPrintStream's internal buffer 130 StringBuilder builder = new StringBuilder(); 131 for (int i = 0; i < 1000; i++) { 132 builder.append("\u20AC"); // a Euro character; 3 bytes in UTF-8 133 } 134 String expected = builder.toString(); 135 136 out.write(expected.getBytes("UTF-8")); 137 out.flush(); 138 assertEquals(Arrays.asList(expected), out.lines); 139 } 140 testWriteOneByteAtATimeMultibyteCharacters()141 public void testWriteOneByteAtATimeMultibyteCharacters() throws Exception { 142 String expected = " \u20AC \u20AC \u20AC \u20AC "; 143 for (byte b : expected.getBytes()) { 144 out.write(b); 145 } 146 out.flush(); 147 assertEquals(Arrays.asList(expected), out.lines); 148 } 149 testWriteByteArrayAtATimeMultibyteCharacters()150 public void testWriteByteArrayAtATimeMultibyteCharacters() throws Exception { 151 String expected = " \u20AC \u20AC \u20AC \u20AC "; 152 out.write(expected.getBytes()); 153 out.flush(); 154 assertEquals(Arrays.asList(expected), out.lines); 155 } 156 testWriteWithOffsetsMultibyteCharacters()157 public void testWriteWithOffsetsMultibyteCharacters() throws Exception { 158 String expected = " \u20AC \u20AC \u20AC \u20AC "; 159 byte[] bytes = expected.getBytes(); 160 int i = 0; 161 while (i < bytes.length - 5) { 162 out.write(bytes, i, 5); 163 i += 5; 164 } 165 out.write(bytes, i, bytes.length - i); 166 out.flush(); 167 assertEquals(Arrays.asList(expected), out.lines); 168 } 169 testWriteFlushesOnNewlines()170 public void testWriteFlushesOnNewlines() throws Exception { 171 String a = " \u20AC \u20AC "; 172 String b = " \u20AC \u20AC "; 173 String c = " "; 174 String toWrite = a + "\n" + b + "\n" + c; 175 out.write(toWrite.getBytes()); 176 out.flush(); 177 assertEquals(Arrays.asList(a, b, c), out.lines); 178 } 179 180 static class TestPrintStream extends LoggingPrintStream { 181 182 final List<String> lines = new ArrayList<String>(); 183 log(String line)184 protected void log(String line) { 185 lines.add(line); 186 } 187 } 188 } 189