chrome/renderer/searchbox/searchbox_extension_unittest.cc

// 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 "chrome/renderer/searchbox/searchbox_extension.h"

#include "chrome/common/search/instant_types.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/gfx/color_palette.h"
#include "ui/gfx/color_utils.h"

namespace internal {

// Defined in searchbox_extension.cc
bool IsNtpBackgroundDark(SkColor ntp_text);
SkColor GetContrastingColorForBackground(SkColor bg_color, float change);
SkColor GetIconColor(const ThemeBackgroundInfo& theme_info);
SkColor GetLogoColor(const ThemeBackgroundInfo& theme_info);

TEST(SearchboxExtensionTest, TestIsNtpBackgroundDark) {
  // Dark font means light background.
  EXPECT_FALSE(IsNtpBackgroundDark(SK_ColorBLACK));

  // Light font means dark background.
  EXPECT_TRUE(IsNtpBackgroundDark(SK_ColorWHITE));

  // Light but close to mid point color text implies dark background.
  EXPECT_TRUE(IsNtpBackgroundDark(SkColorSetARGB(255, 30, 144, 255)));
}

TEST(SearchboxExtensionTest, TestGetContrastingColor) {
  const float change = 0.2f;

  // White icon for black background.
  EXPECT_EQ(SK_ColorWHITE,
            GetContrastingColorForBackground(SK_ColorBLACK, change));

  // Lighter icon for too dark colors.
  SkColor dark_background = SkColorSetARGB(255, 50, 0, 50);
  EXPECT_LT(color_utils::GetRelativeLuminance(dark_background),
            color_utils::GetRelativeLuminance(
                GetContrastingColorForBackground(dark_background, change)));

  // Darker icon for light backgrounds.
  EXPECT_GT(color_utils::GetRelativeLuminance(SK_ColorWHITE),
            color_utils::GetRelativeLuminance(
                GetContrastingColorForBackground(SK_ColorWHITE, change)));

  SkColor light_background = SkColorSetARGB(255, 100, 0, 100);
  EXPECT_GT(color_utils::GetRelativeLuminance(light_background),
            color_utils::GetRelativeLuminance(
                GetContrastingColorForBackground(light_background, change)));
}

TEST(SearchboxExtensionTest, TestGetIconColor) {
  ThemeBackgroundInfo theme_info;
  theme_info.using_default_theme = true;
  theme_info.using_dark_colors = false;
  theme_info.background_color = SK_ColorRED;

  // Default theme in light mode.
  EXPECT_EQ(kNTPLightIconColor, GetIconColor(theme_info));

  // Default theme in dark mode.
  theme_info.using_dark_colors = true;
  EXPECT_EQ(kNTPDarkIconColor, GetIconColor(theme_info));

  // Default theme with custom background, in dark mode.
  theme_info.custom_background_url = GURL("https://www.foo.com");
  EXPECT_EQ(kNTPLightIconColor, GetIconColor(theme_info));

  // Default theme with custom background.
  theme_info.using_dark_colors = false;
  EXPECT_EQ(kNTPLightIconColor, GetIconColor(theme_info));

  // Theme with image.
  theme_info.using_default_theme = false;
  theme_info.custom_background_url = GURL();
  theme_info.has_theme_image = true;
  EXPECT_EQ(kNTPLightIconColor, GetIconColor(theme_info));

  // Theme with image in dark mode.
  theme_info.using_dark_colors = true;
  EXPECT_EQ(kNTPLightIconColor, GetIconColor(theme_info));

  SkColor red_icon_color = GetContrastingColorForBackground(SK_ColorRED, 0.2f);

  // Theme with no image, in dark mode.
  theme_info.has_theme_image = false;
  EXPECT_EQ(red_icon_color, GetIconColor(theme_info));

  // Theme with no image.
  theme_info.using_dark_colors = false;
  EXPECT_EQ(red_icon_color, GetIconColor(theme_info));
}

TEST(SearchboxExtensionTest, TestGetLogoColor) {
  ThemeBackgroundInfo theme_info;
  theme_info.using_default_theme = true;
  theme_info.logo_alternate = false;
  theme_info.background_color = SK_ColorWHITE;

  // Default theme.
  EXPECT_EQ(kNTPLightLogoColor, GetLogoColor(theme_info));

  // Default theme in dark mode.
  theme_info.using_dark_colors = true;
  theme_info.background_color = SK_ColorBLACK;
  EXPECT_EQ(kNTPLightLogoColor, GetLogoColor(theme_info));

  // Default theme with custom background.
  theme_info.using_dark_colors = false;
  theme_info.background_color = SK_ColorWHITE;
  theme_info.custom_background_url = GURL("https://www.foo.com");
  EXPECT_EQ(kNTPLightLogoColor, GetLogoColor(theme_info));

  // Theme with image.
  theme_info.using_default_theme = false;
  theme_info.logo_alternate = true;
  theme_info.custom_background_url = GURL();
  theme_info.has_theme_image = true;
  theme_info.background_color = SK_ColorRED;
  EXPECT_EQ(kNTPLightLogoColor, GetLogoColor(theme_info));

  // Theme with no image.
  theme_info.has_theme_image = false;
  theme_info.background_color = SK_ColorBLACK;
  EXPECT_EQ(SK_ColorWHITE, GetLogoColor(theme_info));

  // Close to midpoint but still dark color should have white logo.
  theme_info.background_color = SkColorSetRGB(120, 120, 120);
  EXPECT_EQ(SK_ColorWHITE, GetLogoColor(theme_info));

  // Light color should have themed logo.
  theme_info.background_color = SkColorSetRGB(130, 130, 130);
  EXPECT_NE(kNTPLightLogoColor, GetLogoColor(theme_info));
  EXPECT_NE(SK_ColorWHITE, GetLogoColor(theme_info));
  EXPECT_NE(theme_info.background_color, GetLogoColor(theme_info));
}
}  // namespace internal