Support Style Sharing for Shadow DOM V1

third_party/WebKit/Source/core/css/resolver/SharedStyleFinderTest.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/css/resolver/SharedStyleFinder.h"
 
 #include "core/css/RuleFeature.h"
 #include "core/css/RuleSet.h"
 #include "core/css/parser/CSSParser.h"
 #include "core/css/parser/CSSParserContext.h"
 #include "core/dom/Document.h"
+#include "core/dom/shadow/ShadowRoot.h"
+#include "core/dom/shadow/ShadowRootInit.h"
 #include "core/frame/FrameView.h"
 #include "core/html/HTMLElement.h"
 #include "core/testing/DummyPageHolder.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include <memory>
 
 namespace blink {
 
 class SharedStyleFinderTest : public ::testing::Test {
  protected:
   SharedStyleFinderTest() = default;
   ~SharedStyleFinderTest() override = default;
 
   Document& document() { return m_dummyPageHolder->document(); }
 
   void setBodyContent(const String& html) {
     document().body()->setInnerHTML(html);
     document().view()->updateAllLifecyclePhases();
   }
 
+  ShadowRoot& attachShadow(Element& host) {
+    ShadowRootInit init;
+    init.setMode("open");
+    ShadowRoot* shadowRoot =
+        host.attachShadow(ScriptState::forMainWorld(document().frame()), init,
+                          ASSERT_NO_EXCEPTION);
+    EXPECT_TRUE(shadowRoot);
+    return *shadowRoot;
+  }
+
   void addSelector(const String& selector) {
     StyleRuleBase* newRule =
         CSSParser::parseRule(CSSParserContext(HTMLStandardMode, nullptr),
                              nullptr, selector + "{color:pink}");
     m_ruleSet->addStyleRule(static_cast<StyleRule*>(newRule),
                             RuleHasNoSpecialState);
   }
 
   void finishAddingSelectors() {
     m_siblingRuleSet = makeRuleSet(m_ruleSet->features().siblingRules());
@@ skipping 133 matching lines @@
   ASSERT_TRUE(a);
   ASSERT_TRUE(b);
 
   EXPECT_FALSE(a->isDragged());
   EXPECT_FALSE(b->isDragged());
 
   EXPECT_TRUE(matchesUncommonAttributeRuleSet(*a));
   EXPECT_FALSE(matchesUncommonAttributeRuleSet(*b));
 }
 
+TEST_F(SharedStyleFinderTest, SlottedPseudoWithAttribute) {
+  setBodyContent("<div id=host><div id=a></div><div id=b attr></div></div>");
+  Element* host = document().getElementById("host");
+  ShadowRoot& root = attachShadow(*host);
+  root.setInnerHTML("<slot></slot>");
+  document().updateDistribution();
+
+  addSelector("::slotted([attr])");
+  finishAddingSelectors();
+
+  Element* a = document().getElementById("a");
+  Element* b = document().getElementById("b");
+
+  EXPECT_TRUE(a->assignedSlot());
+  EXPECT_TRUE(b->assignedSlot());
+
+  EXPECT_FALSE(matchesUncommonAttributeRuleSet(*a));
+  EXPECT_TRUE(matchesUncommonAttributeRuleSet(*b));
+}
+
 }  // namespace blink