Import wpt@5a1f188e0536ad023936cc62f9a00617299dc192

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

Index: third_party/WebKit/LayoutTests/imported/wpt/service-workers/cache-storage/resources/test-helpers.js
diff --git a/third_party/WebKit/LayoutTests/imported/wpt/service-workers/cache-storage/resources/test-helpers.js b/third_party/WebKit/LayoutTests/imported/wpt/service-workers/cache-storage/resources/test-helpers.js
new file mode 100644
index 0000000000000000000000000000000000000000..f4145e6217f5fe4d7ce7c1c8124c234838b0c985
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+++ b/third_party/WebKit/LayoutTests/imported/wpt/service-workers/cache-storage/resources/test-helpers.js
@@ -0,0 +1,237 @@
+(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() {
+        self.caches.delete(cache_name);
+      });
+
+    return self.caches.delete(cache_name)
+      .then(function() {
+          return self.caches.open(cache_name);
+        });
+  }
+
+  self.create_temporary_cache = create_temporary_cache;
+})();
+
+// Runs |test_function| with a temporary unique Cache passed in as the only
+// argument. The function is run as a part of Promise chain owned by
+// 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);
+    }, 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('')
+  },
+
+  {
+    name: 'b',
+    request: new Request('http://example.com/b'),
+    response: new Response('')
+  },
+
+  {
+    name: 'a_with_query',
+    request: new Request('http://example.com/a?q=r'),
+    response: new Response('')
+  },
+
+  {
+    name: 'A',
+    request: new Request('http://example.com/A'),
+    response: new Response('')
+  },
+
+  {
+    name: 'a_https',
+    request: new Request('https://example.com/a'),
+    response: new Response('')
+  },
+
+  {
+    name: 'a_org',
+    request: new Request('http://example.org/a'),
+    response: new Response('')
+  },
+
+  {
+    name: 'cat',
+    request: new Request('http://example.com/cat'),
+    response: new Response('')
+  },
+
+  {
+    name: 'catmandu',
+    request: new Request('http://example.com/catmandu'),
+    response: new Response('')
+  },
+
+  {
+    name: 'cat_num_lives',
+    request: new Request('http://example.com/cat?lives=9'),
+    response: new Response('')
+  },
+
+  {
+    name: 'cat_in_the_hat',
+    request: new Request('http://example.com/cat/in/the/hat'),
+    response: new Response('')
+  },
+
+  {
+    name: 'non_2xx_response',
+    request: new Request('http://example.com/non2xx'),
+    response: new Response('', {status: 404, statusText: 'nope'})
+  },
+
+  {
+    name: 'error_response',
+    request: new Request('http://example.com/error'),
+    response: Response.error()
+  },
+];
+
+// A set of Request/Response pairs to be used with prepopulated_cache_test().
+// These contain a mix of test cases that use Vary headers.
+var vary_entries = [
+  {
+    name: 'vary_cookie_is_cookie',
+    request: new Request('http://example.com/c',
+                         {headers: {'Cookies': 'is-for-cookie'}}),
+    response: new Response('',
+                           {headers: {'Vary': 'Cookies'}})
+  },
+
+  {
+    name: 'vary_cookie_is_good',
+    request: new Request('http://example.com/c',
+                         {headers: {'Cookies': 'is-good-enough-for-me'}}),
+    response: new Response('',
+                           {headers: {'Vary': 'Cookies'}})
+  },
+
+  {
+    name: 'vary_cookie_absent',
+    request: new Request('http://example.com/c'),
+    response: new Response('',
+                           {headers: {'Vary': 'Cookies'}})
+  }
+];
+
+// Run |test_function| with a Cache object and a map of entries. Prior to the
+// call, the Cache is populated by cache entries from |entries|. The latter is
+// expected to be an Object mapping arbitrary keys to objects of the form
+// {request: <Request object>, response: <Response object>}. There's no
+// guarantee on the order in which entries will be added to the cache.
+//
+// |test_function| should return a Promise that can be used with promise_test.
+function prepopulated_cache_test(entries, test_function, description) {
+  cache_test(function(cache) {
+      var p = Promise.resolve();
+      var hash = {};
+      return Promise.all(entries.map(function(entry) {
+          hash[entry.name] = entry;
+          return cache.put(entry.request.clone(),
+                           entry.response.clone())
+            .catch(function(e) {
+                assert_unreached(
+                  'Test setup failed for entry ' + entry.name + ': ' + e);
+            });
+        }))
+        .then(function() {
+            assert_equals(Object.keys(hash).length, entries.length);
+        })
+        .then(function() {
+            return test_function(cache, hash);
+        });
+    }, description);
+}
+
+// Helper for testing with Headers objects. Compares Headers instances
+// by serializing |expected| and |actual| to arrays and comparing.
+function assert_header_equals(actual, expected, description) {
+    assert_class_string(actual, "Headers", description);
+    var header;
+    var actual_headers = [];
+    var expected_headers = [];
+    for (header of actual)
+        actual_headers.push(header[0] + ": " + header[1]);
+    for (header of expected)
+        expected_headers.push(header[0] + ": " + header[1]);
+    assert_array_equals(actual_headers, expected_headers,
+                        description + " Headers differ.");
+}
+
+// Helper for testing with Response objects. Compares simple
+// attributes defined on the interfaces, as well as the headers. It
+// does not compare the response bodies.
+function assert_response_equals(actual, expected, description) {
+    assert_class_string(actual, "Response", description);
+    ["type", "url", "status", "ok", "statusText"].forEach(function(attribute) {
+        assert_equals(actual[attribute], expected[attribute],
+                      description + " Attributes differ: " + attribute + ".");
+    });
+    assert_header_equals(actual.headers, expected.headers, description);
+}
+
+// Assert that the two arrays |actual| and |expected| contain the same
+// set of Responses as determined by assert_response_equals. The order
+// is not significant.
+//
+// |expected| is assumed to not contain any duplicates.
+function assert_response_array_equivalent(actual, expected, description) {
+    assert_true(Array.isArray(actual), description);
+    assert_equals(actual.length, expected.length, description);
+    expected.forEach(function(expected_element) {
+        // assert_response_in_array treats the first argument as being
+        // 'actual', and the second as being 'expected array'. We are
+        // switching them around because we want to be resilient
+        // against the |actual| array containing duplicates.
+        assert_response_in_array(expected_element, actual, description);
+    });
+}
+
+// Asserts that two arrays |actual| and |expected| contain the same
+// set of Responses as determined by assert_response_equals(). The
+// corresponding elements must occupy corresponding indices in their
+// respective arrays.
+function assert_response_array_equals(actual, expected, description) {
+    assert_true(Array.isArray(actual), description);
+    assert_equals(actual.length, expected.length, description);
+    actual.forEach(function(value, index) {
+        assert_response_equals(value, expected[index],
+                               description + " : object[" + index + "]");
+    });
+}
+
+// Equivalent to assert_in_array, but uses assert_response_equals.
+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);
+}