Scopeless matching of :host rules for style sharing.

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 <memory>
 #include "bindings/core/v8/V8Binding.h"
 #include "core/css/RuleFeature.h"
 #include "core/css/RuleSet.h"
@@ skipping 216 matching lines @@
   Element* a = GetDocument().GetElementById("a");
   Element* b = GetDocument().GetElementById("b");
 
   EXPECT_TRUE(a->AssignedSlot());
   EXPECT_TRUE(b->AssignedSlot());
 
   EXPECT_FALSE(MatchesUncommonAttributeRuleSet(*a));
   EXPECT_TRUE(MatchesUncommonAttributeRuleSet(*b));
 }
 
+TEST_F(SharedStyleFinderTest, HostWithAttribute) {
+  SetBodyContent("<div id=host attr></div>");
+  Element* host = GetDocument().GetElementById("host");
+  ShadowRoot& root = AttachShadow(*host);
+  root.setInnerHTML("<slot></slot>");
+  GetDocument().UpdateDistribution();
+
+  AddSelector(":host([attr])");
+  FinishAddingSelectors();
+
+  EXPECT_TRUE(MatchesUncommonAttributeRuleSet(*host));
+}
+
+TEST_F(SharedStyleFinderTest, HostAncestorWithAttribute) {
+  SetBodyContent("<div id=host attr></div>");
+  Element* host = GetDocument().GetElementById("host");
+  ShadowRoot& root = AttachShadow(*host);
+  root.setInnerHTML("<div id=inner></div>");
+  Element* inner = root.getElementById("inner");
+  GetDocument().UpdateDistribution();
+
+  AddSelector(":host([attr]) div");
+  FinishAddingSelectors();
+
+  EXPECT_TRUE(MatchesUncommonAttributeRuleSet(*inner));
+}
+
+TEST_F(SharedStyleFinderTest, HostContextAncestorWithAttribute) {
+  SetBodyContent("<div id=host attr></div>");
+  Element* host = GetDocument().GetElementById("host");
+  ShadowRoot& root = AttachShadow(*host);
+  root.setInnerHTML("<div id=inner></div>");
+  Element* inner = root.getElementById("inner");
+  GetDocument().UpdateDistribution();
+
+  AddSelector(":host-context([attr]) div");
+  FinishAddingSelectors();
+
+  EXPECT_TRUE(MatchesUncommonAttributeRuleSet(*inner));
+}
+
+TEST_F(SharedStyleFinderTest, HostParentWithAttribute) {
+  SetBodyContent("<div id=host attr></div>");
+  Element* host = GetDocument().GetElementById("host");
+  ShadowRoot& root = AttachShadow(*host);
+  root.setInnerHTML("<div id=inner></div>");
+  Element* inner = root.getElementById("inner");
+  GetDocument().UpdateDistribution();
+
+  AddSelector(":host([attr]) > div");
+  FinishAddingSelectors();
+
+  EXPECT_TRUE(MatchesUncommonAttributeRuleSet(*inner));
+}
+
+TEST_F(SharedStyleFinderTest, HostContextParentWithAttribute) {
+  SetBodyContent("<div id=host attr></div>");
+  Element* host = GetDocument().GetElementById("host");
+  ShadowRoot& root = AttachShadow(*host);
+  root.setInnerHTML("<div id=inner></div>");
+  Element* inner = root.getElementById("inner");
+  GetDocument().UpdateDistribution();
+
+  AddSelector(":host-context([attr]) > div");
+  FinishAddingSelectors();
+
+  EXPECT_TRUE(MatchesUncommonAttributeRuleSet(*inner));
+}
+
+TEST_F(SharedStyleFinderTest, AncestorWithAttributeInParentScope) {
+  SetBodyContent("<div id=host attr></div>");
+  Element* host = GetDocument().GetElementById("host");
+  ShadowRoot& root = AttachShadow(*host);
+  root.setInnerHTML("<div id=inner></div>");
+  Element* inner = root.getElementById("inner");
+  GetDocument().UpdateDistribution();
+
+  AddSelector("div[attr] div");
+  FinishAddingSelectors();
+
+  EXPECT_FALSE(MatchesUncommonAttributeRuleSet(*inner));
+}
+
 }  // namespace blink