ServiceWorker: support Response.{status,statusText,headers} [blink] (2/3)

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

+importScripts('worker-test-helpers.js');
+
+test(function() {
+    var headerMap = {

[jsbell, 2014/05/23 20:59:49]

Rename?

[kinuko, 2014/05/26 05:45:13]

Done.

+        'Content-Language': 'ja',
+        'Content-Type': 'text/html; charset=UTF-8',
+        'X-ServiceWorker-Test': 'response test field'
+    };
+
+    var headers = new HeaderMap;
+    Object.keys(headerMap).forEach(function(key) {
+        headers.set(key, headerMap[key]);
+    });
+
+    var response = new Response({
+        status: 303,
+        statusText: 'See Other',
+        headers: headers
+    });
+
+    assert_equals(response.status, 303, 'Response.status should match');
+    assert_equals(response.statusText, 'See Other', 'Response.statusText should match');
+    assert_true(response.headers instanceof HeaderMap, 'Response.headers should be HeaderMap');
+    assert_equals(response.headers.size, 3, 'Response.headers.size should match');
+
+    Object.keys(headerMap).forEach(function(key) {

[falken, 2014/05/24 14:32:36]

Response.h implements namedPropertyEnumerator, but I'm not sure it's tested. Can
we iterate over Response instead to exercise that function?

[kinuko, 2014/05/26 05:45:13]

Actually the spec got updated and we no longer seem to implement getter/setter
behavior either, so I just removed this forEach part.

+        assert_true(key in response);
+        assert_equals(response[key], headerMap[key]);
+    });
+
+    var newKey = 'Cache-Control';
+    var newValue = 'max-age=3600';
+    response[newKey] = newValue;
+    assert_true(newKey in response);
+    assert_equals(response[newKey], newValue);
+}, 'Response in ServiceWorkerGlobalScope');