Add iterator for DocumentMarker::MarkerTypes

third_party/WebKit/Source/core/editing/markers/DocumentMarkerTest.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/DocumentMarker.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace blink {
+
+class DocumentMarkerTest : public ::testing::Test {};
+
+TEST_F(DocumentMarkerTest, MarkerTypesIterator) {

[yosin_UTC9, 2017/03/22 04:06:26]

I would like to have explicit test cases rather than test cases generated by
program.

e.g.

TEST_F(DocumentMarkerTest, MarkerTypeIteratorEmpty) {
  MarkerTypes types(0);
  EXPECT_TRUE(types.begin() == types.end());
}

TEST_F(DocumentMarkerTest, MarkerTypeIteratorOne) {
  MarkerTypes types(DocumentMarker::Spelling);
  ASSERT_TRUE(types.begin() != types.end());
  auto& it = type.begin();
  EXPECT_EQ(DocumentMarker::Spelling, *it);
  ++it;
  EXPECT_TRUE(it == types.end());
}

TEST_F(DocumentMarkerTest, MarkerTypeIteratorConsecutive) {
  MarkerTypes types(0b11);
  ...
}

TEST_F(DocumentMarkerTest, MarkerTypeIteratorDistributed) {
  MarkerTypes types(0b101);
  ...
}

+  for (unsigned markerTypesIndex = 0;
+       markerTypesIndex < (1 << DocumentMarker::MarkerTypeIndexesCount);
+       ++markerTypesIndex) {
+    DocumentMarker::MarkerTypes markerTypes(markerTypesIndex);
+    Vector<DocumentMarker::MarkerType> typesFromIterator;
+
+    for (DocumentMarker::MarkerType type : markerTypes)
+      typesFromIterator.push_back(type);
+
+    for (int markerTypeIndex = 0;
+         markerTypeIndex < DocumentMarker::MarkerTypeIndexesCount;
+         ++markerTypeIndex) {
+      DocumentMarker::MarkerType type =
+          static_cast<DocumentMarker::MarkerType>(1 << markerTypeIndex);
+      ASSERT_EQ(markerTypes.contains(type), typesFromIterator.contains(type))
+          << "MarkerTypeIterator returned wrong result for MarkerType "
+          << (1 << markerTypeIndex) << " in MarkerTypes with mask "
+          << markerTypesIndex;
+    }
+  }
+}
+}