[ServiceWorker] CacheStorage tests.

LayoutTests/http/tests/serviceworker/resources/cache-storage-keys-test-worker.js

Index: LayoutTests/http/tests/serviceworker/resources/cache-storage-keys-test-worker.js
diff --git a/LayoutTests/http/tests/serviceworker/resources/cache-storage-keys-test-worker.js b/LayoutTests/http/tests/serviceworker/resources/cache-storage-keys-test-worker.js
new file mode 100644
index 0000000000000000000000000000000000000000..7d6c41a84f6e57c2daf04b697c377c6eec2eb213
--- /dev/null
+++ b/LayoutTests/http/tests/serviceworker/resources/cache-storage-keys-test-worker.js
@@ -0,0 +1,29 @@
+importScripts('worker-test-harness.js');
+
+var test_cache_list = ['enum-1', 'enum-2', 'enum-3'];
+
+promise_test(function(test) {
+    return caches.keys()
+      .then(test.step_func(function(keys) {
+          assert_equals(keys.length,
+                        0,
+                        'CacheStorage.keys should return an empty list for ' +
+                        'a new ServiceWorker.');
+        }))
+
+      .then(function() {
+          return Promise.all(test_cache_list.map(function(key) {
+              return caches.create(key);
+            }));
+        })
+
+      .then(function() { return caches.keys(); })
+      .then(test.step_func(function(keys) {
+          assert_true(Array.isArray(keys),
+                      'CacheStorage.keys should return an Array.');
+          assert_array_equals(keys,
+                              test_cache_list,
+                              'CacheStroage.keys should only return ' +

[jsbell, 2014/08/01 00:09:11]

Typo: 'Stroage'

[asanka, 2014/08/01 06:03:21]

Done.

+                              'existing caches');
+        }));
+  }, 'CacheStorage keys');