1 /* 2 * Copyright (C) 2010 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 libcore.java.lang; 18 19 import junit.framework.TestCase; 20 21 import java.io.BufferedWriter; 22 import java.io.ByteArrayOutputStream; 23 import java.io.PrintStream; 24 import java.io.PrintWriter; 25 import java.io.StringWriter; 26 import java.util.Formatter; 27 28 public class SystemTest extends TestCase { 29 testLineSeparator()30 public void testLineSeparator() throws Exception { 31 try { 32 // Before Java 7, the small number of classes that wanted the line separator would 33 // use System.getProperty. Now they should use System.lineSeparator instead, and the 34 // "line.separator" property has no effect after the VM has started. 35 36 // Test System.lineSeparator directly. 37 assertEquals("\n", System.lineSeparator()); 38 System.setProperty("line.separator", "poop"); 39 assertEquals("\n", System.lineSeparator()); 40 assertFalse(System.lineSeparator().equals(System.getProperty("line.separator"))); 41 42 // java.io.BufferedWriter --- uses System.lineSeparator on Android but not on RI. 43 StringWriter sw = new StringWriter(); 44 BufferedWriter bw = new BufferedWriter(sw); 45 bw.newLine(); 46 bw.flush(); 47 assertEquals(System.lineSeparator(), sw.toString()); 48 assertFalse(System.lineSeparator().equals(System.getProperty("line.separator"))); 49 50 // java.io.PrintStream --- uses System.lineSeparator on Android but not on RI. 51 ByteArrayOutputStream baos = new ByteArrayOutputStream(); 52 new PrintStream(baos).println(); 53 assertEquals(System.lineSeparator(), new String(baos.toByteArray(), "UTF-8")); 54 assertFalse(System.lineSeparator().equals(System.getProperty("line.separator"))); 55 56 // java.io.PrintWriter --- uses System.lineSeparator on Android but not on RI. 57 sw = new StringWriter(); 58 new PrintWriter(sw).println(); 59 assertEquals(System.lineSeparator(), sw.toString()); 60 assertFalse(System.lineSeparator().equals(System.getProperty("line.separator"))); 61 62 // java.util.Formatter --- uses System.lineSeparator on both. 63 assertEquals(System.lineSeparator(), new Formatter().format("%n").toString()); 64 assertFalse(System.lineSeparator().equals(System.getProperty("line.separator"))); 65 } finally { 66 System.setProperty("line.separator", "\n"); 67 } 68 } 69 testArrayCopyTargetNotArray()70 public void testArrayCopyTargetNotArray() { 71 try { 72 System.arraycopy(new char[5], 0, "Hello", 0, 3); 73 fail(); 74 } catch (ArrayStoreException e) { 75 assertEquals("destination of type java.lang.String is not an array", e.getMessage()); 76 } 77 } 78 testArrayCopySourceNotArray()79 public void testArrayCopySourceNotArray() { 80 try { 81 System.arraycopy("Hello", 0, new char[5], 0, 3); 82 fail(); 83 } catch (ArrayStoreException e) { 84 assertEquals("source of type java.lang.String is not an array", e.getMessage()); 85 } 86 } 87 testArrayCopyArrayTypeMismatch()88 public void testArrayCopyArrayTypeMismatch() { 89 try { 90 System.arraycopy(new char[5], 0, new Object[5], 0, 3); 91 fail(); 92 } catch (ArrayStoreException e) { 93 assertEquals("char[] and java.lang.Object[] are incompatible array types", e.getMessage()); 94 } 95 } 96 testArrayCopyElementTypeMismatch()97 public void testArrayCopyElementTypeMismatch() { 98 try { 99 System.arraycopy(new Object[] { null, 5, "hello" }, 0, 100 new Integer[] { 1, 2, 3, null, null }, 0, 3); 101 fail(); 102 } catch (ArrayStoreException e) { 103 assertEquals("source[2] of type java.lang.String cannot be stored in destination array of type java.lang.Integer[]", e.getMessage()); 104 } 105 } 106 testArrayCopyNull()107 public void testArrayCopyNull() { 108 try { 109 System.arraycopy(null, 0, new char[5], 0, 3); 110 fail(); 111 } catch (NullPointerException e) { 112 assertEquals("src == null", e.getMessage()); 113 } 114 try { 115 System.arraycopy(new char[5], 0, null, 0, 3); 116 fail(); 117 } catch (NullPointerException e) { 118 assertEquals("dst == null", e.getMessage()); 119 } 120 } 121 } 122