[ServiceWorker] Implement Headers class.

LayoutTests/http/tests/serviceworker/resources/headers-worker.js

 importScripts('worker-test-helpers.js');
 
 test(function() {
     var expectedMap = {
         'Content-Language': 'ja',
         'Content-Type': 'text/html; charset=UTF-8',
         'X-ServiceWorker-Test': 'response test field'
     };
 
-    var headers = new HeaderMap;
+    var headers = new Headers;
     Object.keys(expectedMap).forEach(function(key) {
         headers.set(key, expectedMap[key]);
     });
 
     // 'size'
     assert_equals(headers.size, 3, 'headers.size should match');
 
     // 'has()', 'get()'
     var key = 'Content-Type';
     assert_true(headers.has(key));
     assert_equals(headers.get(key), expectedMap[key]);
+    assert_equals(headers.get('dummy'), null);
 
     // 'delete()'
     var deleteKey = 'Content-Type';
     headers.delete(deleteKey);
     assert_equals(headers.size, 2, 'headers.size should have -1 size');
     Object.keys(expectedMap).forEach(function(key) {
         if (key == deleteKey)
             assert_false(headers.has(key));
         else
             assert_true(headers.has(key));
@@ skipping 43 matching lines @@
         expectedMap[key] = expectedValue;
     });
 
     // 'forEach()'
     headers.forEach(function(value, key) {
         assert_true(key != deleteKey);
         assert_true(key in expectedMap);
         assert_equals(headers.get(key), expectedMap[key]);
     });
 
+    // 'append()', 'getAll()'
+    var allValues = headers.getAll('X-ServiceWorker-Test');
+    assert_equals(allValues.length, 1);
+    assert_equals(headers.size, 5);
+    headers.append('X-ServiceWorker-Test', 'response test field - append');
+    assert_equals(headers.size, 6);

[falken, 2014/06/27 02:08:06]

can you add a description indicating the size should increase by one?

[horo, 2014/06/27 04:19:10]

Done.

+    allValues = headers.getAll('X-ServiceWorker-Test');
+    assert_equals(headers.get('X-ServiceWorker-Test'), 'response test field - updated');

[falken, 2014/06/27 02:08:05]

nit: seems to read better if line 92 and 93 are swapped

[falken, 2014/06/27 02:08:06]

add a description that the value of the first header added should be returned

[horo, 2014/06/27 04:19:10]

Done.

[horo, 2014/06/27 04:19:10]

Done.

+    assert_equals(allValues.length, 2);
+    assert_equals(allValues[0], 'response test field - updated');
+    assert_equals(allValues[1], 'response test field - append');
+    headers.set('X-ServiceWorker-Test', 'response test field - set');
+    assert_equals(headers.size, 5);

[falken, 2014/06/27 02:08:05]

seems a description would be useful here, and for several below (size should
remain the same, increase/decrease by one, etc.)

[horo, 2014/06/27 04:19:10]

Done.

+    allValues = headers.getAll('X-ServiceWorker-Test');
+    assert_equals(allValues.length, 1);
+    assert_equals(allValues[0], 'response test field - set');
+    headers.append('X-ServiceWorker-Test', 'response test field - append');
+    assert_equals(headers.size, 6);
+    headers.delete('X-ServiceWorker-Test');
+    assert_equals(headers.size, 4);
+
+    // new Headers with sequence<sequence<ByteString>>
+    headers = new Headers([['a', 'b'], ['c', 'd'], ['c', 'e']]);
+    assert_equals(headers.size, 3, 'headers.size should match');
+    assert_equals(headers.get('a'), 'b');
+    assert_equals(headers.get('c'), 'd');
+    assert_equals(headers.getAll('c')[0], 'd');
+    assert_equals(headers.getAll('c')[1], 'e');
+
+    // new Headers with Headers
+    var headers2 = new Headers(headers);
+    assert_equals(headers2.size, 3, 'headers.size should match');
+    assert_equals(headers2.get('a'), 'b');
+    assert_equals(headers2.get('c'), 'd');
+    assert_equals(headers2.getAll('c')[0], 'd');
+    assert_equals(headers2.getAll('c')[1], 'e');
+    headers.set('a', 'x');
+    assert_equals(headers.get('a'), 'x');
+    assert_equals(headers2.get('a'), 'b');
+
+    // new Headers with Dictionary
+    headers = new Headers({'a': 'b', 'c': 'd'});
+    assert_equals(headers.size, 2, 'headers.size should match');
+    assert_equals(headers.get('a'), 'b');
+    assert_equals(headers.get('c'), 'd');
+
+    // Throw errors
+    assert_throws({name:'TypeError'}, function() { headers.append('', 'a'); },
+                  'Headers.append with an invalid name should throw');

[falken, 2014/06/27 02:08:05]

are there any invalid names other than ''? could be worth using different names
for more coverage

[horo, 2014/06/27 04:19:10]

Done.

+    assert_throws({name:'TypeError'}, function() { headers.delete(''); },
+                  'Headers.delete with an invalid name should throw');
+    assert_throws({name:'TypeError'}, function() { headers.get(''); },
+                  'Headers.get with an invalid name should throw');
+    assert_throws({name:'TypeError'}, function() { headers.getAll(''); },
+                  'Headers.getAll with an invalid name should throw');
+    assert_throws({name:'TypeError'}, function() { headers.has(''); },
+                  'Headers.has with an invalid name should throw');
+    assert_throws({name:'TypeError'}, function() { headers.set('', 'a'); },
+                  'Headers.set with an invalid name should throw');
+
+    assert_throws({name:'TypeError'},
+                  function() { headers.append('a', 'test \r data'); },
+                  'Headers.append with an invalid value should throw');
+    assert_throws({name:'TypeError'},
+                  function() { headers.append('a', 'test \n data'); },
+                  'Headers.append with an invalid value should throw');
+    assert_throws({name:'TypeError'},
+                  function() { headers.set('a', 'test \r data'); },
+                  'Headers.set with an invalid value should throw');
+    assert_throws({name:'TypeError'},
+                  function() { headers.set('a', 'test \n data'); },
+                  'Headers.set with an invalid value should throw');
+
+    assert_throws({name:'TypeError'},
+                  function() { var headers = new Headers({'': 'a'}); },
+                  'new Headers with an invalid name should throw');
+    assert_throws({name:'TypeError'},
+                  function() { var headers = new Headers([['', 'a']]); },
+                  'new Headers with an invalid name should throw');
+    assert_throws({name:'TypeError'},
+                  function() { var headers = new Headers({'a': 'a\rb'}); },
+                  'new Headers with an invalid value should throw');
+    assert_throws({name:'TypeError'},
+                  function() { var headers = new Headers({'a': 'a\nb'}); },
+                  'new Headers with an invalid value should throw');
+    assert_throws({name:'TypeError'},
+                  function() { var headers = new Headers([['a', 'a\rb']]); },
+                  'new Headers with an invalid value should throw');
+    assert_throws({name:'TypeError'},
+                  function() { var headers = new Headers([['a', 'a\nb']]); },
+                  'new Headers with an invalid value should throw');
+    assert_throws({name:'TypeError'},
+                  function() { var headers = new Headers([[]]); },
+                  'new Headers with an invalid value should throw');
+    assert_throws({name:'TypeError'},
+                  function() { var headers = new Headers([['a']]); },
+                  'new Headers with an invalid value should throw');
+    assert_throws({name:'TypeError'},
+                  function() { var headers = new Headers([['a', 'b'], []]); },
+                  'new Headers with an invalid value should throw');
+
     // 'forEach()' with thisArg
     var that = {}, saw_that;
-    headers = new HeaderMap;
+    headers = new Headers;
     headers.set('a', 'b');
     headers.forEach(function() { saw_that = this; }, that);
     assert_equals(saw_that, that, 'Passed thisArg should match');
 
     headers.forEach(function() { 'use strict'; saw_that = this; }, 'abc');
     assert_equals(saw_that, 'abc', 'Passed non-object thisArg should match');
 
     headers.forEach(function() { saw_that = this; }, null);
     assert_equals(saw_that, self, 'Passed null thisArg should be replaced with global object');
 
-}, 'HeaderMap in ServiceWorkerGlobalScope');
+}, 'Headers in ServiceWorkerGlobalScope');