| // Copyright 2019 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 "ui/color/color_recipe.h" |
| |
| #include "testing/gtest/include/gtest/gtest.h" |
| #include "ui/color/color_mixer.h" |
| #include "ui/color/color_set.h" |
| #include "ui/color/color_test_ids.h" |
| #include "ui/color/color_transform.h" |
| #include "ui/gfx/color_palette.h" |
| |
| namespace ui { |
| namespace { |
| |
| // Tests that a recipe with no transforms passes through its input color |
| // unchanged. |
| TEST(ColorRecipeTest, EmptyRecipeIsPassthrough) { |
| const ColorRecipe recipe; |
| const auto verify_passthrough = [&](SkColor input) { |
| EXPECT_EQ(input, recipe.GenerateResult(input, ColorMixer())); |
| }; |
| verify_passthrough(SK_ColorBLACK); |
| verify_passthrough(SK_ColorWHITE); |
| verify_passthrough(SK_ColorRED); |
| } |
| |
| // Tests that a transform in a recipe has an effect. |
| TEST(ColorRecipeTest, OneTransform) { |
| constexpr SkColor kOutput = SK_ColorGREEN; |
| ColorRecipe recipe = {kOutput}; |
| const auto verify_transform = [&](SkColor input) { |
| EXPECT_EQ(kOutput, recipe.GenerateResult(input, ColorMixer())); |
| }; |
| verify_transform(SK_ColorBLACK); |
| verify_transform(SK_ColorWHITE); |
| verify_transform(SK_ColorRED); |
| } |
| |
| // Tests that in a recipe with multiple transforms, each is applied. |
| TEST(ColorRecipeTest, ChainedTransforms) { |
| ColorRecipe recipe = DeriveDefaultIconColor(FromTransformInput()) + |
| BlendForMinContrast(FromTransformInput(), kColorTest0); |
| constexpr SkColor kBackground = SK_ColorWHITE; |
| ColorMixer mixer; |
| mixer.AddSet({kColorSetTest0, {{kColorTest0, kBackground}}}); |
| const auto verify_chain = [&](SkColor input) { |
| const SkColor color = recipe.GenerateResult(input, mixer); |
| // The DeriveDefaultIconColor transform should change the output color even |
| // when the BlendForMinContrast transform takes no action. |
| EXPECT_NE(input, color); |
| // The BlendForMinContrast transform should always be able to guarantee |
| // readable contrast against white. |
| EXPECT_GE(color_utils::GetContrastRatio(color, kBackground), |
| color_utils::kMinimumReadableContrastRatio); |
| }; |
| verify_chain(SK_ColorBLACK); |
| verify_chain(SK_ColorWHITE); |
| verify_chain(SK_ColorRED); |
| } |
| |
| } // namespace |
| } // namespace ui |