1 files changed, 121 insertions, 0 deletions
diff --git a/chromium/third_party/blink/renderer/core/css/resolver/cascade_filter_test.cc b/chromium/third_party/blink/renderer/core/css/resolver/cascade_filter_test.cc
new file mode 100644
index 00000000000..2ef0adaa4f6
--- /dev/null
+++ b/chromium/third_party/blink/renderer/core/css/resolver/cascade_filter_test.cc
@@ -0,0 +1,121 @@
+// Copyright 2020 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 "third_party/blink/renderer/core/css/resolver/cascade_filter.h"
+#include <gtest/gtest.h>
+
+namespace blink {
+
+TEST(CascadeFilterTest, FilterNothing) {
+  CascadeFilter filter;
+  EXPECT_FALSE(filter.Rejects(GetCSSPropertyBackgroundColor()));
+  EXPECT_FALSE(filter.Rejects(GetCSSPropertyColor()));
+  EXPECT_FALSE(filter.Rejects(GetCSSPropertyDisplay()));
+  EXPECT_FALSE(filter.Rejects(GetCSSPropertyFloat()));
+  EXPECT_FALSE(filter.Rejects(GetCSSPropertyInternalVisitedColor()));
+}
+
+TEST(CascadeFilterTest, ConstructorBehavesLikeSingleAdd) {
+  EXPECT_EQ(CascadeFilter().Add(CSSProperty::kInherited, true),
+            CascadeFilter(CSSProperty::kInherited, true));
+  EXPECT_EQ(CascadeFilter().Add(CSSProperty::kInherited, false),
+            CascadeFilter(CSSProperty::kInherited, false));
+}
+
+TEST(CascadeFilterTest, Equals) {
+  EXPECT_EQ(CascadeFilter(CSSProperty::kInherited, true),
+            CascadeFilter(CSSProperty::kInherited, true));
+  EXPECT_EQ(CascadeFilter(CSSProperty::kInherited, false),
+            CascadeFilter(CSSProperty::kInherited, false));
+}
+
+TEST(CascadeFilterTest, NotEqualsMask) {
+  EXPECT_NE(CascadeFilter(CSSProperty::kInherited, true),
+            CascadeFilter(CSSProperty::kInherited, false));
+  EXPECT_NE(CascadeFilter(CSSProperty::kInherited, false),
+            CascadeFilter(CSSProperty::kVisited, false));
+  EXPECT_NE(CascadeFilter(CSSProperty::kInherited, false),
+            CascadeFilter(CSSProperty::kInherited, false)
+                .Add(CSSProperty::kVisited, false));
+  EXPECT_NE(CascadeFilter(CSSProperty::kInherited, false), CascadeFilter());
+}
+
+TEST(CascadeFilterTest, FilterInherited) {
+  CascadeFilter filter(CSSProperty::kInherited, true);
+  EXPECT_FALSE(filter.Rejects(GetCSSPropertyBackgroundColor()));
+  EXPECT_TRUE(filter.Rejects(GetCSSPropertyColor()));
+  EXPECT_TRUE(filter.Rejects(GetCSSPropertyFontSize()));
+  EXPECT_FALSE(filter.Rejects(GetCSSPropertyDisplay()));
+  EXPECT_FALSE(filter.Rejects(GetCSSPropertyFloat()));
+  EXPECT_TRUE(filter.Rejects(GetCSSPropertyInternalVisitedColor()));
+}
+
+TEST(CascadeFilterTest, FilterNonInherited) {
+  CascadeFilter filter(CSSProperty::kInherited, false);
+  EXPECT_TRUE(filter.Rejects(GetCSSPropertyBackgroundColor()));
+  EXPECT_FALSE(filter.Rejects(GetCSSPropertyColor()));
+  EXPECT_TRUE(filter.Rejects(GetCSSPropertyDisplay()));
+  EXPECT_TRUE(filter.Rejects(GetCSSPropertyFloat()));
+  EXPECT_FALSE(filter.Rejects(GetCSSPropertyInternalVisitedColor()));
+}
+
+TEST(CascadeFilterTest, FilterVisitedAndInherited) {
+  auto filter = CascadeFilter()
+                    .Add(CSSProperty::kVisited, true)
+                    .Add(CSSProperty::kInherited, true);
+  EXPECT_FALSE(filter.Rejects(GetCSSPropertyBackgroundColor()));
+  EXPECT_TRUE(filter.Rejects(GetCSSPropertyColor()));
+  EXPECT_FALSE(filter.Rejects(GetCSSPropertyDisplay()));
+  EXPECT_FALSE(filter.Rejects(GetCSSPropertyFloat()));
+  EXPECT_TRUE(filter.Rejects(GetCSSPropertyInternalVisitedBackgroundColor()));
+}
+
+TEST(CascadeFilterTest, FilterVisitedAndNonInherited) {
+  auto filter = CascadeFilter()
+                    .Add(CSSProperty::kVisited, true)
+                    .Add(CSSProperty::kInherited, false);
+  EXPECT_TRUE(filter.Rejects(GetCSSPropertyBackgroundColor()));
+  EXPECT_FALSE(filter.Rejects(GetCSSPropertyColor()));
+  EXPECT_TRUE(filter.Rejects(GetCSSPropertyDisplay()));
+  EXPECT_TRUE(filter.Rejects(GetCSSPropertyFloat()));
+  EXPECT_TRUE(filter.Rejects(GetCSSPropertyInternalVisitedColor()));
+}
+
+TEST(CascadeFilterTest, RejectFlag) {
+  auto filter = CascadeFilter()
+                    .Add(CSSProperty::kVisited, true)
+                    .Add(CSSProperty::kInherited, false);
+  EXPECT_TRUE(filter.Rejects(CSSProperty::kVisited, true));
+  EXPECT_TRUE(filter.Rejects(CSSProperty::kInherited, false));
+  EXPECT_FALSE(filter.Rejects(CSSProperty::kVisited, false));
+  EXPECT_FALSE(filter.Rejects(CSSProperty::kInherited, true));
+}
+
+TEST(CascadeFilterTest, AddDoesNotOverwrite) {
+  auto filter = CascadeFilter()
+                    .Add(CSSProperty::kVisited, true)
+                    .Add(CSSProperty::kInherited, false);
+  EXPECT_TRUE(filter.Rejects(CSSProperty::kVisited, true));
+  EXPECT_TRUE(filter.Rejects(CSSProperty::kInherited, false));
+  filter = filter.Add(CSSProperty::kVisited, false);
+  filter = filter.Add(CSSProperty::kInherited, true);
+  // Add has no effect if flags are already set:
+  EXPECT_TRUE(filter.Rejects(CSSProperty::kVisited, true));
+  EXPECT_TRUE(filter.Rejects(CSSProperty::kInherited, false));
+}
+
+TEST(CascadeFilterTest, SetDoesOverwrite) {
+  auto filter = CascadeFilter()
+                    .Add(CSSProperty::kVisited, true)
+                    .Add(CSSProperty::kInherited, false);
+  EXPECT_TRUE(filter.Rejects(CSSProperty::kVisited, true));
+  EXPECT_TRUE(filter.Rejects(CSSProperty::kInherited, false));
+  filter = filter.Set(CSSProperty::kVisited, false);
+  filter = filter.Set(CSSProperty::kInherited, true);
+  // Add has no effect if flags are already set:
+  EXPECT_TRUE(filter.Rejects(CSSProperty::kVisited, false));
+  EXPECT_TRUE(filter.Rejects(CSSProperty::kInherited, true));
+}
+
+}  // namespace blink