chromium/third_party/blink/renderer/core/scroll/scrollbar_theme_fluent_unittest.cc

// Copyright 2022 The Chromium Authors
// 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/scroll/scrollbar_theme_fluent.h"

#include <memory>

#include "base/gtest_prod_util.h"
#include "base/test/scoped_feature_list.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/blink/renderer/core/scroll/scroll_types.h"
#include "third_party/blink/renderer/core/scroll/scrollbar.h"
#include "third_party/blink/renderer/core/scroll/scrollbar_test_suite.h"
#include "third_party/blink/renderer/core/testing/scoped_mock_overlay_scrollbars.h"
#include "third_party/blink/renderer/platform/testing/runtime_enabled_features_test_helpers.h"
#include "third_party/blink/renderer/platform/testing/task_environment.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/native_theme/native_theme_features.h"

namespace blink {

Return;

namespace {

// Const values for unit tests.
constexpr int kScrollbarLength = …;
constexpr int kOffsetFromViewport = …;

}  // namespace

class ScrollbarThemeFluentMock : public ScrollbarThemeFluent { … };

class ScrollbarThemeFluentTest : public ::testing::TestWithParam<float> { … };

class OverlayScrollbarThemeFluentTest : public ScrollbarThemeFluentTest { … };

// Test that the scrollbar's thickness scales appropriately with the thumb's
// thickness and always maintains proportion with the DIP scale.
TEST_P(ScrollbarThemeFluentTest, ScrollbarThicknessScalesProperly) { … }

// Test that Scrollbar objects are correctly sized with Fluent theme parts.
TEST_P(ScrollbarThemeFluentTest, VerticalScrollbarPartsSizes) { … }

// Test that Scrollbar objects are correctly sized with Fluent theme parts.
TEST_P(ScrollbarThemeFluentTest, HorizontalScrollbarPartsSizes) { … }

// The test verifies that the background paint is not invalidated when
// the thumb position changes. Aura scrollbars change arrow buttons color
// when the scroll offset changes from and to the min/max scroll offset.
// Fluent scrollbars do not change the arrow buttons color in this case.
TEST_P(ScrollbarThemeFluentTest, ScrollbarBackgroundInvalidationTest) { … }

// Test that Scrollbar objects are correctly sized with Overlay Fluent theme
// parts.
TEST_P(OverlayScrollbarThemeFluentTest, OverlaySetsCorrectTrackAndInsetSize) { … }

// Same as ScrollbarThemeFluentTest.ScrollbarThicknessScalesProperly, but for
// Overlay Scrollbars.
TEST_P(OverlayScrollbarThemeFluentTest, ScrollbarThicknessScalesProperly) { … }

TEST_P(OverlayScrollbarThemeFluentTest, TestVerticalInsetTrackRect) { … }

TEST_P(OverlayScrollbarThemeFluentTest, TestHorizontalInsetTrackRect) { … }

TEST_P(OverlayScrollbarThemeFluentTest, TestVerticalInsetButtonRect) { … }

TEST_P(OverlayScrollbarThemeFluentTest, TestHorizontalInsetButtonRect) { … }

INSTANTIATE_TEST_SUITE_P(…);
INSTANTIATE_TEST_SUITE_P(…);

}  // namespace blink