| // Copyright 2020 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "third_party/blink/renderer/core/loader/font_preload_manager.h" |
| |
| #include "base/test/scoped_feature_list.h" |
| #include "third_party/blink/public/common/features.h" |
| #include "third_party/blink/renderer/core/frame/web_local_frame_impl.h" |
| #include "third_party/blink/renderer/core/testing/sim/sim_request.h" |
| #include "third_party/blink/renderer/core/testing/sim/sim_test.h" |
| #include "third_party/blink/renderer/platform/testing/unit_test_helpers.h" |
| |
| namespace blink { |
| |
| class FontPreloadManagerTest : public SimTest { |
| public: |
| void SetUp() override { |
| scoped_feature_list_.InitAndEnableFeature( |
| features::kFontPreloadingDelaysRendering); |
| SimTest::SetUp(); |
| } |
| |
| protected: |
| FontPreloadManager& GetFontPreloadManager() { |
| return GetDocument().GetFontPreloadManager(); |
| } |
| |
| using State = FontPreloadManager::State; |
| State GetState() { return GetFontPreloadManager().state_; } |
| |
| private: |
| base::test::ScopedFeatureList scoped_feature_list_; |
| }; |
| |
| TEST_F(FontPreloadManagerTest, FastFontFinishBeforeBody) { |
| SimRequest main_resource("https://example.com", "text/html"); |
| SimRequest font_resource("https://example.com/font.woff", "font/woff2"); |
| |
| LoadURL("https://example.com"); |
| main_resource.Write(R"HTML( |
| <!doctype html> |
| <head> |
| <link rel="preload" as="font" type="font/woff2" |
| href="https://example.com/font.woff"> |
| )HTML"); |
| |
| // Rendering is blocked due to ongoing font preloading. |
| EXPECT_TRUE(Compositor().DeferMainFrameUpdate()); |
| EXPECT_TRUE(GetFontPreloadManager().HasPendingRenderBlockingFonts()); |
| EXPECT_EQ(State::kLoading, GetState()); |
| |
| font_resource.Finish(); |
| test::RunPendingTasks(); |
| |
| // Font preloading no longer blocks renderings. However, rendering is still |
| // blocked, as we don't have BODY yet. |
| EXPECT_TRUE(Compositor().DeferMainFrameUpdate()); |
| EXPECT_FALSE(GetFontPreloadManager().HasPendingRenderBlockingFonts()); |
| EXPECT_EQ(State::kLoaded, GetState()); |
| |
| main_resource.Complete("</head><body>some text</body>"); |
| |
| // Rendering starts after BODY has arrived, as the font was loaded earlier. |
| EXPECT_FALSE(Compositor().DeferMainFrameUpdate()); |
| EXPECT_FALSE(GetFontPreloadManager().HasPendingRenderBlockingFonts()); |
| EXPECT_EQ(State::kUnblocked, GetState()); |
| } |
| |
| TEST_F(FontPreloadManagerTest, FastFontFinishAfterBody) { |
| SimRequest main_resource("https://example.com", "text/html"); |
| SimRequest font_resource("https://example.com/font.woff", "font/woff2"); |
| |
| LoadURL("https://example.com"); |
| main_resource.Write(R"HTML( |
| <!doctype html> |
| <head> |
| <link rel="preload" as="font" type="font/woff2" |
| href="https://example.com/font.woff"> |
| )HTML"); |
| |
| // Rendering is blocked due to ongoing font preloading. |
| EXPECT_TRUE(Compositor().DeferMainFrameUpdate()); |
| EXPECT_TRUE(GetFontPreloadManager().HasPendingRenderBlockingFonts()); |
| EXPECT_EQ(State::kLoading, GetState()); |
| |
| main_resource.Complete("</head><body>some text</body>"); |
| |
| // Rendering is still blocked by font, even if we already have BODY, because |
| // the font was *not* loaded earlier. |
| EXPECT_TRUE(Compositor().DeferMainFrameUpdate()); |
| EXPECT_TRUE(GetFontPreloadManager().HasPendingRenderBlockingFonts()); |
| EXPECT_EQ(State::kLoading, GetState()); |
| |
| font_resource.Finish(); |
| test::RunPendingTasks(); |
| |
| // Rendering starts after font preloading has finished. |
| EXPECT_FALSE(Compositor().DeferMainFrameUpdate()); |
| EXPECT_FALSE(GetFontPreloadManager().HasPendingRenderBlockingFonts()); |
| EXPECT_EQ(State::kUnblocked, GetState()); |
| } |
| |
| TEST_F(FontPreloadManagerTest, SlowFontTimeoutBeforeBody) { |
| SimRequest main_resource("https://example.com", "text/html"); |
| SimRequest font_resource("https://example.com/font.woff", "font/woff2"); |
| |
| LoadURL("https://example.com"); |
| main_resource.Write(R"HTML( |
| <!doctype html> |
| <head> |
| <link rel="preload" as="font" type="font/woff2" |
| href="https://example.com/font.woff"> |
| )HTML"); |
| |
| // Rendering is blocked due to ongoing font preloading. |
| EXPECT_TRUE(Compositor().DeferMainFrameUpdate()); |
| EXPECT_TRUE(GetFontPreloadManager().HasPendingRenderBlockingFonts()); |
| EXPECT_EQ(State::kLoading, GetState()); |
| |
| GetFontPreloadManager().FontPreloadingDelaysRenderingTimerFired(nullptr); |
| |
| // Font preloading no longer blocks renderings after the timeout fires. |
| // However, rendering is still blocked, as we don't have BODY yet. |
| EXPECT_TRUE(Compositor().DeferMainFrameUpdate()); |
| EXPECT_FALSE(GetFontPreloadManager().HasPendingRenderBlockingFonts()); |
| EXPECT_EQ(State::kUnblocked, GetState()); |
| |
| main_resource.Complete("</head><body>some text</body>"); |
| |
| // Rendering starts after BODY has arrived. |
| EXPECT_FALSE(Compositor().DeferMainFrameUpdate()); |
| EXPECT_FALSE(GetFontPreloadManager().HasPendingRenderBlockingFonts()); |
| EXPECT_EQ(State::kUnblocked, GetState()); |
| |
| font_resource.Finish(); |
| } |
| |
| TEST_F(FontPreloadManagerTest, SlowFontTimeoutAfterBody) { |
| SimRequest main_resource("https://example.com", "text/html"); |
| SimRequest font_resource("https://example.com/font.woff", "font/woff2"); |
| |
| LoadURL("https://example.com"); |
| main_resource.Write(R"HTML( |
| <!doctype html> |
| <head> |
| <link rel="preload" as="font" type="font/woff2" |
| href="https://example.com/font.woff"> |
| )HTML"); |
| |
| // Rendering is blocked due to ongoing font preloading. |
| EXPECT_TRUE(Compositor().DeferMainFrameUpdate()); |
| EXPECT_TRUE(GetFontPreloadManager().HasPendingRenderBlockingFonts()); |
| EXPECT_EQ(State::kLoading, GetState()); |
| |
| main_resource.Complete("</head><body>some text</body>"); |
| |
| // Rendering is still blocked by font, even if we already have BODY. |
| EXPECT_TRUE(Compositor().DeferMainFrameUpdate()); |
| EXPECT_TRUE(GetFontPreloadManager().HasPendingRenderBlockingFonts()); |
| EXPECT_EQ(State::kLoading, GetState()); |
| |
| GetFontPreloadManager().FontPreloadingDelaysRenderingTimerFired(nullptr); |
| |
| // Rendering starts after we've waited for the font preloading long enough. |
| EXPECT_FALSE(Compositor().DeferMainFrameUpdate()); |
| EXPECT_FALSE(GetFontPreloadManager().HasPendingRenderBlockingFonts()); |
| EXPECT_EQ(State::kUnblocked, GetState()); |
| |
| font_resource.Finish(); |
| } |
| |
| } // namespace blink |
