[DMC #4] Add CompositionMarkerListImpl

third_party/WebKit/Source/core/editing/markers/CompositionMarkerListImplTest.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/CompositionMarkerListImpl.h"
+
+#include "core/editing/EditingTestBase.h"
+#include "core/editing/markers/RenderedDocumentMarker.h"
+
+namespace blink {
+
+class CompositionMarkerListImplTest : public EditingTestBase {
+ protected:
+  CompositionMarkerListImplTest()
+      : marker_list_(new CompositionMarkerListImpl()) {}
+
+  DocumentMarker* CreateMarker(unsigned start_offset, unsigned end_offset) {
+    return new DocumentMarker(start_offset, end_offset, Color::kBlack, false,
+                              Color::kBlack);
+  }
+
+  Persistent<CompositionMarkerListImpl> marker_list_;
+};
+
+TEST_F(CompositionMarkerListImplTest, Add) {

[Xiaocheng, 2017/04/26 14:17:53]

nit: please add a comment that this tests CompositionMarkerListImpl doesn't
merge touching markers.

+  EXPECT_EQ(0u, marker_list_->GetMarkers().size());
+
+  marker_list_->Add(CreateMarker(0, 1));
+  marker_list_->Add(CreateMarker(1, 2));
+
+  EXPECT_EQ(2u, marker_list_->GetMarkers().size());
+
+  EXPECT_EQ(0u, marker_list_->GetMarkers()[0]->StartOffset());
+  EXPECT_EQ(1u, marker_list_->GetMarkers()[0]->EndOffset());
+
+  EXPECT_EQ(1u, marker_list_->GetMarkers()[1]->StartOffset());
+  EXPECT_EQ(2u, marker_list_->GetMarkers()[1]->EndOffset());
+}
+
+}  // namespace blink