[MediaElement] Allow preloading for non-network scheme src

third_party/WebKit/Source/core/html/HTMLMediaElementTest.cpp

 // Copyright 2016 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 "core/html/HTMLMediaElement.h"
 
+#include "core/frame/Settings.h"
 #include "core/html/HTMLAudioElement.h"
 #include "core/html/HTMLVideoElement.h"
+#include "core/page/NetworkStateNotifier.h"
 #include "core/testing/DummyPageHolder.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blink {
 
 enum class TestParam { Audio, Video };
 
 class HTMLMediaElementTest : public ::testing::TestWithParam<TestParam> {
  protected:
   void SetUp() {
     m_dummyPageHolder = DummyPageHolder::create();
 
     if (GetParam() == TestParam::Audio)
       m_media = HTMLAudioElement::create(m_dummyPageHolder->document());
     else
       m_media = HTMLVideoElement::create(m_dummyPageHolder->document());
   }
 
   HTMLMediaElement* media() { return m_media.get(); }
+  void setCurrentSrc(const String& src) {
+    KURL url(ParsedURLString, src);
+    media()->m_currentSrc = url;
+  }
 
  private:
   std::unique_ptr<DummyPageHolder> m_dummyPageHolder;
   Persistent<HTMLMediaElement> m_media;
 };
 
 INSTANTIATE_TEST_CASE_P(Audio,
                         HTMLMediaElementTest,
                         ::testing::Values(TestParam::Audio));
 INSTANTIATE_TEST_CASE_P(Video,
@@ skipping 10 matching lines @@
       {0.0, true, 0.0},  {0.5, true, 0.0},  {1.0, true, 0.0},
   };
 
   for (const auto& data : test_data) {
     media()->setVolume(data.volume);
     media()->setMuted(data.muted);
     EXPECT_EQ(data.effectiveVolume, media()->effectiveMediaVolume());
   }
 }
 
+enum class TestURLScheme {
+  kHttp,
+  kHttps,
+  kFtp,
+  kFile,
+  kData,
+  kBlob,
+};
+
+String srcSchemeToURL(TestURLScheme scheme) {
+  switch (scheme) {
+    case TestURLScheme::kHttp:
+      return "http://example.com/foo.mp4";
+    case TestURLScheme::kHttps:
+      return "https://example.com/foo.mp4";
+    case TestURLScheme::kFtp:
+      return "ftp://example.com/foo.mp4";
+    case TestURLScheme::kFile:
+      return "file:///foo/bar.mp4";
+    case TestURLScheme::kData:
+      return "data:video/mp4;base64,XXXXXXX";
+    case TestURLScheme::kBlob:
+      return "blob:http://example.com/00000000-0000-0000-0000-000000000000";
+  }
+}
+
+TEST_P(HTMLMediaElementTest, preloadType) {
+  struct TestData {
+    bool dataSaverEnabled;
+    bool forcePreloadNoneForMediaElements;
+    bool isCellular;
+    TestURLScheme srcScheme;
+    AtomicString preloadToSet;
+    AtomicString preloadExpected;
+  } testData[] = {
+      // Tests for conditions in which preload type should be overriden to
+      // "none".
+      {false, true, false, TestURLScheme::kHttp, "auto", "none"},
+      {true, true, false, TestURLScheme::kHttps, "auto", "none"},
+      {true, true, false, TestURLScheme::kFtp, "metadata", "none"},
+      {false, false, false, TestURLScheme::kHttps, "auto", "auto"},
+      {false, true, false, TestURLScheme::kFile, "auto", "auto"},
+      {false, true, false, TestURLScheme::kData, "metadata", "metadata"},
+      {false, true, false, TestURLScheme::kBlob, "auto", "auto"},
+      {false, true, false, TestURLScheme::kFile, "none", "none"},
+      // Tests for conditions in which preload type should be overriden to
+      // "metadata".
+      {false, false, true, TestURLScheme::kHttp, "auto", "metadata"},
+      {false, false, true, TestURLScheme::kHttp, "scheme", "metadata"},
+      {false, false, true, TestURLScheme::kHttp, "none", "none"},
+      // Tests that the preload is overriden to "auto"
+      {false, false, false, TestURLScheme::kHttp, "foo", "auto"},
+  };
+
+  int index = 0;
+  for (const auto& data : testData) {
+    media()->document().settings()->setDataSaverEnabled(data.dataSaverEnabled);
+    media()->document().settings()->setForcePreloadNoneForMediaElements(
+        data.forcePreloadNoneForMediaElements);
+    if (data.isCellular) {
+      networkStateNotifier().setOverride(
+          true, WebConnectionType::WebConnectionTypeCellular3G, 2.0);
+    } else {
+      networkStateNotifier().clearOverride();
+    }
+    setCurrentSrc(srcSchemeToURL(data.srcScheme));
+    media()->setPreload(data.preloadToSet);
+
+    EXPECT_EQ(data.preloadExpected, media()->preload())
+        << "preload type differs at index" << index;
+    ++index;
+  }
+}
+
 }  // namespace blink