1 /* 2 * Copyright (C) 2011 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.net; 18 19 import com.google.common.base.Ascii; 20 import com.google.common.base.Joiner; 21 import com.google.common.base.Splitter; 22 import com.google.common.collect.ImmutableBiMap; 23 import com.google.common.collect.ImmutableSet; 24 import com.google.common.collect.Lists; 25 26 import junit.framework.TestCase; 27 28 import java.lang.reflect.Field; 29 import java.util.List; 30 31 /** 32 * Tests for the HttpHeaders class. 33 * 34 * @author Kurt Alfred Kluever 35 */ 36 public class HttpHeadersTest extends TestCase { 37 38 public void testConstantNameMatchesString() throws Exception { 39 // Special case some of the weird HTTP Header names... 40 ImmutableBiMap<String, String> specialCases = ImmutableBiMap.of("ETAG", "ETag"); 41 ImmutableSet<String> uppercaseAcronyms = ImmutableSet.of( 42 "ID", "DNT", "IP", "MD5", "P3P", "TE", "UID", "URL", "WWW", "XSS"); 43 assertConstantNameMatchesString(HttpHeaders.class, specialCases, uppercaseAcronyms); 44 } 45 46 // Visible for other tests to use 47 static void assertConstantNameMatchesString(Class<?> clazz, 48 ImmutableBiMap<String, String> specialCases, ImmutableSet<String> uppercaseAcronyms) 49 throws IllegalAccessException { 50 for (Field field : relevantFields(clazz)) { 51 assertEquals(upperToHttpHeaderName(field.getName(), specialCases, uppercaseAcronyms), 52 field.get(null)); 53 } 54 } 55 56 // Visible for other tests to use 57 static ImmutableSet<Field> relevantFields(Class<?> cls) { 58 ImmutableSet.Builder<Field> builder = ImmutableSet.builder(); 59 for (Field field : cls.getDeclaredFields()) { 60 /* 61 * Coverage mode generates synthetic fields. If we ever add private 62 * fields, they will cause similar problems, and we may want to switch 63 * this check to isAccessible(). 64 */ 65 if (!field.isSynthetic() && field.getType() == String.class) { 66 builder.add(field); 67 } 68 } 69 return builder.build(); 70 } 71 72 private static final Splitter SPLITTER = Splitter.on('_'); 73 private static final Joiner JOINER = Joiner.on('-'); 74 75 private static String upperToHttpHeaderName(String constantName, 76 ImmutableBiMap<String, String> specialCases, ImmutableSet<String> uppercaseAcronyms) { 77 if (specialCases.containsKey(constantName)) { 78 return specialCases.get(constantName); 79 } 80 List<String> parts = Lists.newArrayList(); 81 for (String part : SPLITTER.split(constantName)) { 82 if (!uppercaseAcronyms.contains(part)) { 83 part = part.charAt(0) + Ascii.toLowerCase(part.substring(1)); 84 } 85 parts.add(part); 86 } 87 return JOINER.join(parts); 88 } 89 } 90
