Current work-in-progress crbug.com/567021

third_party/WebKit/Source/core/css/RuleFeatureSetTest.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/css/RuleFeature.h"
 
 #include "core/css/CSSSelectorList.h"
 #include "core/css/RuleSet.h"
 #include "core/css/StylePropertySet.h"
 #include "core/css/StyleRule.h"
@@ skipping 26 matching lines @@
 
     RuleFeatureSet::SelectorPreMatch collectFeatures(const String& selectorText)
     {
         CSSSelectorList selectorList = CSSParser::parseSelector(strictCSSParserContext(), nullptr, selectorText);
 
         StyleRule* styleRule = StyleRule::create(std::move(selectorList), MutableStylePropertySet::create(HTMLStandardMode));
         RuleData ruleData(styleRule, 0, 0, RuleHasNoSpecialState);
         return m_ruleFeatureSet.collectFeaturesFromRuleData(ruleData);
     }
 
+    void clearFeatures()
+    {
+        m_ruleFeatureSet.clear();
+    }
+
     void collectInvalidationSetsForClass(InvalidationLists& invalidationLists, const AtomicString& className) const
     {
         Element* element = Traversal<HTMLElement>::firstChild(*Traversal<HTMLElement>::firstChild(*m_document->body()));
         m_ruleFeatureSet.collectInvalidationSetsForClass(invalidationLists, *element, className);
     }
 
     void collectInvalidationSetsForId(InvalidationLists& invalidationLists, const AtomicString& id) const
     {
         Element* element = Traversal<HTMLElement>::firstChild(*Traversal<HTMLElement>::firstChild(*m_document->body()));
         m_ruleFeatureSet.collectInvalidationSetsForId(invalidationLists, *element, id);
@@ skipping 116 matching lines @@
     void expectSiblingRuleCount(unsigned count)
     {
         EXPECT_EQ(count, m_ruleFeatureSet.siblingRules.size());
     }
 
     void expectUncommonAttributeRuleCount(unsigned count)
     {
         EXPECT_EQ(count, m_ruleFeatureSet.uncommonAttributeRules.size());
     }
 
+    void expectFullRecalcForRuleSetInvalidation(bool expected)
+    {
+        EXPECT_EQ(expected, m_ruleFeatureSet.needsFullRecalcForRuleSetInvalidation());
+    }
+
     DEFINE_INLINE_TRACE()
     {
         visitor->trace(m_ruleFeatureSet);
         visitor->trace(m_document);
     }
 
 private:
     RuleFeatureSet m_ruleFeatureSet;
     Persistent<Document> m_document;
 };
@@ skipping 333 matching lines @@
     EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures(":host-context(*) [attr]"));
     expectUncommonAttributeRuleCount(1);
 }
 
 TEST_F(RuleFeatureSetTest, uncommonAttributeRulesAfterHostContextBeforePseudo)
 {
     EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures(":host-context([attr])::before"));
     expectUncommonAttributeRuleCount(1);
 }
 
+TEST_F(RuleFeatureSetTest, RuleSetInvalidationHostContext)
+{
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures(":host-context(.x)"));
+    expectFullRecalcForRuleSetInvalidation(true);
+    clearFeatures();
+
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures(":host-context(.x) .y"));
+    expectFullRecalcForRuleSetInvalidation(false);
+}
+
+TEST_F(RuleFeatureSetTest, RuleSetInvalidationHost)
+{
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures(":host(.x)"));
+    expectFullRecalcForRuleSetInvalidation(false);
+    clearFeatures();
+
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures(":host(*) .y"));
+    expectFullRecalcForRuleSetInvalidation(false);
+    clearFeatures();
+
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures(":host(.x) .y"));
+    expectFullRecalcForRuleSetInvalidation(false);
+}
+
+TEST_F(RuleFeatureSetTest, RuleSetInvalidationNot)
+{
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures(":not(.x)"));
+    expectFullRecalcForRuleSetInvalidation(true);
+    clearFeatures();
+
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures(":not(.x) :hover"));
+    expectFullRecalcForRuleSetInvalidation(true);
+    clearFeatures();
+
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures(":not(.x) .y"));
+    expectFullRecalcForRuleSetInvalidation(false);
+    clearFeatures();
+
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures(":not(.x) + .y"));
+    expectFullRecalcForRuleSetInvalidation(false);
+}
+
+TEST_F(RuleFeatureSetTest, RuleSetInvalidationCustomPseudo)
+{
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures("::-webkit-slider-thumb"));
+    expectFullRecalcForRuleSetInvalidation(true);
+    clearFeatures();
+
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures(".x::-webkit-slider-thumb"));
+    expectFullRecalcForRuleSetInvalidation(false);
+    clearFeatures();
+
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures(".x + ::-webkit-slider-thumb"));
+    expectFullRecalcForRuleSetInvalidation(false);
+}
+
+TEST_F(RuleFeatureSetTest, RuleSetInvalidationDeep)
+{
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures("* /deep/ .x"));
+    expectFullRecalcForRuleSetInvalidation(true);
+    clearFeatures();
+
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures("body /deep/ .x"));
+    expectFullRecalcForRuleSetInvalidation(true);
+    clearFeatures();
+
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures("#x /deep/ .y"));
+    expectFullRecalcForRuleSetInvalidation(false);
+    clearFeatures();
+
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures("#x /deep/ *"));
+    expectFullRecalcForRuleSetInvalidation(false);
+}
+
+TEST_F(RuleFeatureSetTest, RuleSetInvalidationShadow)
+{
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures("*::shadow .x"));
+    expectFullRecalcForRuleSetInvalidation(true);
+    clearFeatures();
+
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures(".x::shadow *"));
+    expectFullRecalcForRuleSetInvalidation(false);
+    clearFeatures();
+
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures("[x] ::shadow .y"));
+    expectFullRecalcForRuleSetInvalidation(false);
+}
+
+TEST_F(RuleFeatureSetTest, RuleSetInvalidationContent)
+{
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures("*::content .x"));
+    expectFullRecalcForRuleSetInvalidation(true);
+    clearFeatures();
+
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures(".x::content *"));
+    expectFullRecalcForRuleSetInvalidation(false);
+    clearFeatures();
+
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures("[x] ::content .y"));
+    expectFullRecalcForRuleSetInvalidation(false);
+}
+
+TEST_F(RuleFeatureSetTest, RuleSetInvalidationSlotted)
+{
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures("::slotted(*)"));
+    expectFullRecalcForRuleSetInvalidation(true);
+    clearFeatures();
+
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures("::slotted(.y)"));
+    expectFullRecalcForRuleSetInvalidation(false);
+    clearFeatures();
+
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures(".x::slotted(.y)"));
+    expectFullRecalcForRuleSetInvalidation(false);
+    clearFeatures();
+
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures("[x] ::slotted(.y)"));
+    expectFullRecalcForRuleSetInvalidation(false);
+}
+
+TEST_F(RuleFeatureSetTest, RuleSetInvalidationAnyPseudo)
+{
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures(":-webkit-any(*, #x)"));
+    expectFullRecalcForRuleSetInvalidation(true);
+    clearFeatures();
+
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures(".x:-webkit-any(*, #y)"));
+    expectFullRecalcForRuleSetInvalidation(false);
+    clearFeatures();
+
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures(":-webkit-any(:-webkit-any(.a, .b), #x)"));
+    expectFullRecalcForRuleSetInvalidation(false);
+    clearFeatures();
+
+    EXPECT_EQ(RuleFeatureSet::SelectorMayMatch, collectFeatures(":-webkit-any(:-webkit-any(.a, *), #x)"));
+    expectFullRecalcForRuleSetInvalidation(true);
+}
+
 } // namespace blink