Import wpt@3c8896ae408c8fd594979da7c99970029e7856a7

third_party/WebKit/LayoutTests/imported/wpt/service-workers/cache-storage/resources/test-helpers.js

 (function() {
   var next_cache_index = 1;
 
   // Returns a promise that resolves to a newly created Cache object. The
   // returned Cache will be destroyed when |test| completes.
   function create_temporary_cache(test) {
     var uniquifier = String(++next_cache_index);
     var cache_name = self.location.pathname + '/' + uniquifier;
 
     test.add_cleanup(function() {
@@ skipping 14 matching lines @@
 // promise_test(). As such, it is expected to behave in a manner identical (with
 // the exception of the argument) to a function passed into promise_test().
 //
 // E.g.:
 //    cache_test(function(cache) {
 //      // Do something with |cache|, which is a Cache object.
 //    }, "Some Cache test");
 function cache_test(test_function, description) {
   promise_test(function(test) {
       return create_temporary_cache(test)
-        .then(test_function);
+        .then(function(cache) { return test_function(cache, test); });
     }, description);
 }
 
 // A set of Request/Response pairs to be used with prepopulated_cache_test().
 var simple_entries = [
   {
     name: 'a',
     request: new Request('http://example.com/a'),
     response: new Response('')
   },
@@ skipping 182 matching lines @@
 function assert_response_in_array(actual, expected_array, description) {
     assert_true(expected_array.some(function(element) {
         try {
             assert_response_equals(actual, element);
             return true;
         } catch (e) {
             return false;
         }
     }), description);
 }
+
+// Deletes all caches, returning a promise indicating success.
+function delete_all_caches() {
+  return self.caches.keys()
+    .then(function(keys) {
+      return Promise.all(keys.map(self.caches.delete.bind(self.caches)));
+    });
+}