[DMC #24] Add SpellingMarker and GrammarMarker (subclasses of DocumentMarker)

third_party/WebKit/Source/core/editing/markers/GrammarMarkerTest.cpp

+// Copyright 2017 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/editing/markers/GrammarMarker.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace blink {
+
+const char* const kDescription = "Test description";
+
+class GrammarMarkerTest : public ::testing::Test {};
+
+TEST_F(GrammarMarkerTest, MarkerType) {

[yosin_UTC9, 2017/06/01 05:45:40]

Could you add a test case for IsSpellCheckerMarker() for GrammarMarker?

+  DocumentMarker* marker = new GrammarMarker(0, 1, kDescription);
+  EXPECT_EQ(DocumentMarker::kGrammar, marker->GetType());
+}
+
+TEST_F(GrammarMarkerTest, ConstructorAndGetters) {
+  GrammarMarker* marker = new GrammarMarker(0, 1, kDescription);
+  EXPECT_EQ(kDescription, marker->Description());
+}
+
+}  // namespace blink