Add HTMLPreloadScanner support for <link rel=preload>

third_party/WebKit/Source/core/html/parser/HTMLPreloadScannerTest.cpp

 // Copyright 2015 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/parser/HTMLPreloadScanner.h"
 
 #include "core/MediaTypeNames.h"
 #include "core/css/MediaValuesCached.h"
 #include "core/fetch/ClientHintsPreferences.h"
 #include "core/frame/Settings.h"
@@ skipping 33 matching lines @@
 };
 
 class MockHTMLResourcePreloader : public ResourcePreloader {
 public:
     void preloadRequestVerification(Resource::Type type, const char* url, const char* baseURL, int width, const ClientHintsPreferences& preferences)
     {
         if (!url) {
             EXPECT_FALSE(m_preloadRequest);
             return;
         }
+        ASSERT(m_preloadRequest.get());
         EXPECT_FALSE(m_preloadRequest->isPreconnect());
         EXPECT_EQ(type, m_preloadRequest->resourceType());
         EXPECT_STREQ(url, m_preloadRequest->resourceURL().ascii().data());
         EXPECT_STREQ(baseURL, m_preloadRequest->baseURL().string().ascii().data());
         EXPECT_EQ(width, m_preloadRequest->resourceWidth());
         EXPECT_EQ(preferences.shouldSendDPR(), m_preloadRequest->preferences().shouldSendDPR());
         EXPECT_EQ(preferences.shouldSendResourceWidth(), m_preloadRequest->preferences().shouldSendResourceWidth());
         EXPECT_EQ(preferences.shouldSendViewportWidth(), m_preloadRequest->preferences().shouldSendViewportWidth());
     }
 
@@ skipping 290 matching lines @@
         { "http://example.test", "<meta name='referrer' content='no-referrer'><img referrerpolicy='origin' src='bla.gif'/>", "bla.gif", "http://example.test/", Resource::Image, 0, ReferrerPolicyOrigin },
         // The scanner's state is not reset between test cases, so all subsequent test cases have a document referrer policy of no-referrer.
         { "http://example.test", "<img referrerpolicy='not-a-valid-policy' src='bla.gif'/>", "bla.gif", "http://example.test/", Resource::Image, 0, ReferrerPolicyNever },
         { "http://example.test", "<img src='bla.gif'/>", "bla.gif", "http://example.test/", Resource::Image, 0, ReferrerPolicyNever }
     };
 
     for (const auto& testCase : testCases)
         test(testCase);
 }
 
+TEST_F(HTMLPreloadScannerTest, testLinkRelPreload)
+{
+    TestCase testCases[] = {
+        {"http://example.test", "<link rel=preload href=bla>", "bla", "http://example.test/", Resource::LinkSubresource, 0},
+        {"http://example.test", "<link rel=preload href=bla as=script>", "bla", "http://example.test/", Resource::Script, 0},
+        {"http://example.test", "<link rel=preload href=bla as=style>", "bla", "http://example.test/", Resource::CSSStyleSheet, 0},
+        {"http://example.test", "<link rel=preload href=bla as=image>", "bla", "http://example.test/", Resource::Image, 0},
+        {"http://example.test", "<link rel=preload href=bla as=font>", "bla", "http://example.test/", Resource::Font, 0},
+        {"http://example.test", "<link rel=preload href=bla as=audio>", "bla", "http://example.test/", Resource::Media, 0},
+        {"http://example.test", "<link rel=preload href=bla as=video>", "bla", "http://example.test/", Resource::Media, 0},
+        {"http://example.test", "<link rel=preload href=bla as=track>", "bla", "http://example.test/", Resource::TextTrack, 0},
+    };
+
+    for (const auto& testCase : testCases)
+        test(testCase);
+}
+
 } // namespace blink