WebFonts cache-aware timeout adaptation

third_party/WebKit/Source/core/fetch/ResourceFetcherTest.cpp

 /*
  * Copyright (c) 2013, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 26 matching lines @@
 #include "core/fetch/ImageResource.h"
 #include "core/fetch/MemoryCache.h"
 #include "core/fetch/MockResourceClients.h"
 #include "core/fetch/RawResource.h"
 #include "core/fetch/ResourceLoader.h"
 #include "platform/WebTaskRunner.h"
 #include "platform/exported/WrappedResourceResponse.h"
 #include "platform/heap/Handle.h"
 #include "platform/heap/HeapAllocator.h"
 #include "platform/heap/Member.h"
+#include "platform/network/ResourceError.h"
 #include "platform/network/ResourceRequest.h"
 #include "platform/network/ResourceTimingInfo.h"
 #include "platform/scheduler/test/fake_web_task_runner.h"
 #include "platform/testing/URLTestHelpers.h"
 #include "platform/testing/weburl_loader_mock.h"
 #include "platform/weborigin/KURL.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebURLLoaderMockFactory.h"
 #include "public/platform/WebURLResponse.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 652 matching lines @@
       FetchRequest(resourceRequest, FetchInitiatorInfo());
   Platform::current()->getURLLoaderMockFactory()->registerURL(
       url, WebURLResponse(), "");
   Resource* newResource = RawResource::fetch(fetchRequest, fetcher);
   fetcher->stopFetching();
   Platform::current()->getURLLoaderMockFactory()->unregisterURL(url);
 
   EXPECT_NE(resource, newResource);
 }
 
+// Helper for accessing private members of FontResource.

[tkent, 2016/11/15 05:59:23]

You don't need such class.  You should add FRIEND_TEST_ALL_PREFIXES to
FontResource class declaration.

[Shao-Chuan Lee, 2016/11/15 06:47:45]

Done, thanks for noting this!

+class FontResourceTestHelper {
+ public:
+  static void initLoadLimitState(FontResource* resource) {
+    resource->m_loadLimitState = FontResource::UnderLimit;
+  }
+
+  static void callFontLoadShortLimitCallback(FontResource* resource) {
+    resource->fontLoadShortLimitCallback(nullptr);
+  }
+
+  static void callFontLoadLongLimitCallback(FontResource* resource) {
+    resource->fontLoadLongLimitCallback(nullptr);
+  }
+};
+
+TEST_F(ResourceFetcherTest, CacheAwareFontLoading) {
+  KURL url(ParsedURLString, "http://127.0.0.1:8000/font.woff");
+  ResourceResponse response;
+  response.setURL(url);
+  response.setHTTPStatusCode(200);
+  Platform::current()->getURLLoaderMockFactory()->registerURL(
+      url, WrappedResourceResponse(response), "");
+
+  ResourceFetcher* fetcher =
+      ResourceFetcher::create(ResourceFetcherTestMockFetchContext::create());
+
+  FetchRequest fetchRequest = FetchRequest(url, FetchInitiatorInfo());
+  fetchRequest.setCacheAwareLoadingEnabled(IsCacheAwareLoadingEnabled);
+  FontResource* resource = FontResource::fetch(fetchRequest, fetcher);
+  ASSERT_TRUE(resource);
+
+  Persistent<MockFontResourceClient> client =
+      new MockFontResourceClient(resource);
+  fetcher->startLoad(resource);
+  EXPECT_TRUE(resource->loader()->isCacheAwareLoadingActivated());
+  FontResourceTestHelper::initLoadLimitState(resource);
+
+  // FontResource callbacks should be blocked during cache-aware loading.
+  FontResourceTestHelper::callFontLoadShortLimitCallback(resource);
+  EXPECT_FALSE(client->fontLoadShortLimitExceededCalled());
+
+  // Fail first request as disk cache miss.
+  resource->loader()->didFail(ResourceError::cacheMissError(url));
+
+  // Once cache miss error returns, previously blocked callbacks should be
+  // called immediately.
+  EXPECT_FALSE(resource->loader()->isCacheAwareLoadingActivated());
+  EXPECT_TRUE(client->fontLoadShortLimitExceededCalled());
+  EXPECT_FALSE(client->fontLoadLongLimitExceededCalled());
+
+  // Add client now, fontLoadShortLimitExceeded() should be called.
+  Persistent<MockFontResourceClient> client2 =
+      new MockFontResourceClient(resource);
+  EXPECT_TRUE(client2->fontLoadShortLimitExceededCalled());
+  EXPECT_FALSE(client2->fontLoadLongLimitExceededCalled());
+
+  // FontResource callbacks are not blocked now.
+  FontResourceTestHelper::callFontLoadLongLimitCallback(resource);
+  EXPECT_TRUE(client->fontLoadLongLimitExceededCalled());
+
+  // Add client now, both callbacks should be called.
+  Persistent<MockFontResourceClient> client3 =
+      new MockFontResourceClient(resource);
+  EXPECT_TRUE(client3->fontLoadShortLimitExceededCalled());
+  EXPECT_TRUE(client3->fontLoadLongLimitExceededCalled());
+
+  Platform::current()->getURLLoaderMockFactory()->serveAsynchronousRequests();
+  Platform::current()->getURLLoaderMockFactory()->unregisterURL(url);
+  memoryCache()->remove(resource);
+}
+
 }  // namespace blink