Initial OpenType Font Variations Support

third_party/WebKit/Source/platform/fonts/opentype/FontSettingsTest.cpp

+// Copyright 2016 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 "platform/fonts/opentype/FontSettings.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+#include "wtf/PassRefPtr.h"
+
+namespace blink {
+
+PassRefPtr<FontVariationSettings> makeFontVariationSettings(
+    std::initializer_list<FontVariationAxis> variationAxes) {
+  RefPtr<FontVariationSettings> variationSettings =
+      FontVariationSettings::create();
+
+  for (auto axis = variationAxes.begin(); axis != variationAxes.end(); ++axis) {
+    variationSettings->append(*axis);
+  }
+  return variationSettings;
+}
+
+TEST(FontSettingsTest, HashTest) {
+  RefPtr<FontVariationSettings> oneAxisA =
+      makeFontVariationSettings({FontVariationAxis{"a   ", 0}});
+  RefPtr<FontVariationSettings> oneAxisB =
+      makeFontVariationSettings({FontVariationAxis{"b   ", 0}});
+  RefPtr<FontVariationSettings> twoAxes = makeFontVariationSettings(
+      {FontVariationAxis{"a   ", 0}, FontVariationAxis{"b   ", 0}});
+  RefPtr<FontVariationSettings> twoAxesDifferentValue =
+      makeFontVariationSettings(
+          {FontVariationAxis{"a   ", 0}, FontVariationAxis{"b   ", 1}});
+
+  RefPtr<FontVariationSettings> emptyVariationSettings =
+      FontVariationSettings::create();
+
+  CHECK_NE(oneAxisA->hash(), oneAxisB->hash());
+  CHECK_NE(oneAxisA->hash(), twoAxes->hash());
+  CHECK_NE(oneAxisA->hash(), twoAxesDifferentValue->hash());
+  CHECK_NE(emptyVariationSettings->hash(), oneAxisA->hash());
+  CHECK_EQ(emptyVariationSettings->hash(), 0u);
+};
+
+}  // namespace blink