1 /* 2 * Copyright (C) 2007 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 17 package com.google.common.base; 18 19 import com.google.common.annotations.GwtCompatible; 20 import com.google.common.annotations.GwtIncompatible; 21 22 import junit.framework.TestCase; 23 24 import java.nio.charset.Charset; 25 import java.util.Arrays; 26 27 /** 28 * Unit test for {@link Charsets}. 29 * 30 * @author Mike Bostock 31 */ 32 @GwtCompatible(emulated = true) 33 public class CharsetsTest extends TestCase { 34 35 @GwtIncompatible("Non-UTF-8 Charset") 36 public void testUsAscii() { 37 assertEquals(Charset.forName("US-ASCII"), Charsets.US_ASCII); 38 } 39 40 @GwtIncompatible("Non-UTF-8 Charset") 41 public void testIso88591() { 42 assertEquals(Charset.forName("ISO-8859-1"), Charsets.ISO_8859_1); 43 } 44 45 public void testUtf8() { 46 assertEquals(Charset.forName("UTF-8"), Charsets.UTF_8); 47 } 48 49 @GwtIncompatible("Non-UTF-8 Charset") 50 public void testUtf16be() { 51 assertEquals(Charset.forName("UTF-16BE"), Charsets.UTF_16BE); 52 } 53 54 @GwtIncompatible("Non-UTF-8 Charset") 55 public void testUtf16le() { 56 assertEquals(Charset.forName("UTF-16LE"), Charsets.UTF_16LE); 57 } 58 59 @GwtIncompatible("Non-UTF-8 Charset") 60 public void testUtf16() { 61 assertEquals(Charset.forName("UTF-16"), Charsets.UTF_16); 62 } 63 64 @GwtIncompatible("Non-UTF-8 Charset") 65 public void testWhyUsAsciiIsDangerous() { 66 byte[] b1 = "".getBytes(Charsets.US_ASCII); 67 byte[] b2 = "".getBytes(Charsets.US_ASCII); 68 byte[] b3 = "????".getBytes(Charsets.US_ASCII); 69 byte[] b4 = "".getBytes(Charsets.US_ASCII); 70 byte[] b5 = "".getBytes(Charsets.US_ASCII); 71 // Assert they are all equal (using the transitive property) 72 assertTrue(Arrays.equals(b1, b2)); 73 assertTrue(Arrays.equals(b2, b3)); 74 assertTrue(Arrays.equals(b3, b4)); 75 assertTrue(Arrays.equals(b4, b5)); 76 } 77 } 78
