ui/display/manager/display_change_observer_unittest.cc

// Copyright 2013 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/display/manager/display_change_observer.h"

#include <string>

#include "base/test/scoped_feature_list.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/display/display_features.h"
#include "ui/display/display_switches.h"
#include "ui/display/fake/fake_display_snapshot.h"
#include "ui/display/manager/display_configurator.h"
#include "ui/display/manager/managed_display_info.h"
#include "ui/display/types/display_mode.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/size.h"

namespace display {

namespace {

float ComputeDeviceScaleFactor(float diagonal_inch,
                               const gfx::Rect& resolution) {
  // We assume that displays have square pixel.
  float diagonal_pixel = std::sqrt(std::pow(resolution.width(), 2) +
                                   std::pow(resolution.height(), 2));
  float dpi = diagonal_pixel / diagonal_inch;
  return DisplayChangeObserver::FindDeviceScaleFactor(dpi);
}

std::unique_ptr<DisplayMode> MakeDisplayMode(int width,
                                             int height,
                                             bool is_interlaced,
                                             float refresh_rate) {
  return std::make_unique<DisplayMode>(gfx::Size(width, height), is_interlaced,
                                       refresh_rate);
}

}  // namespace

class DisplayChangeObserverTest : public testing::Test,
                                  public testing::WithParamInterface<bool> {
 public:
  DisplayChangeObserverTest() = default;
  ~DisplayChangeObserverTest() override = default;

  // testing::Test:
  void SetUp() override {
    if (GetParam()) {
      scoped_feature_list_.InitAndEnableFeature(features::kListAllDisplayModes);
    } else {
      scoped_feature_list_.InitAndDisableFeature(
          features::kListAllDisplayModes);
    }

    Test::SetUp();
  }

 private:
  base::test::ScopedFeatureList scoped_feature_list_;

  DISALLOW_COPY_AND_ASSIGN(DisplayChangeObserverTest);
};

TEST_P(DisplayChangeObserverTest, GetExternalManagedDisplayModeList) {
  std::unique_ptr<DisplaySnapshot> display_snapshot =
      FakeDisplaySnapshot::Builder()
          .SetId(123)
          .SetNativeMode(MakeDisplayMode(1920, 1200, false, 60))
          // Same size as native mode but with higher refresh rate.
          .AddMode(MakeDisplayMode(1920, 1200, false, 75))
          // All non-interlaced (as would be seen with different refresh rates).
          .AddMode(MakeDisplayMode(1920, 1080, false, 80))
          .AddMode(MakeDisplayMode(1920, 1080, false, 70))
          .AddMode(MakeDisplayMode(1920, 1080, false, 60))
          // Interlaced vs non-interlaced.
          .AddMode(MakeDisplayMode(1280, 720, true, 60))
          .AddMode(MakeDisplayMode(1280, 720, false, 60))
          // Interlaced only.
          .AddMode(MakeDisplayMode(1024, 768, true, 70))
          .AddMode(MakeDisplayMode(1024, 768, true, 60))
          // Mixed.
          .AddMode(MakeDisplayMode(1024, 600, true, 60))
          .AddMode(MakeDisplayMode(1024, 600, false, 70))
          .AddMode(MakeDisplayMode(1024, 600, false, 60))
          // Just one interlaced mode.
          .AddMode(MakeDisplayMode(640, 480, true, 60))
          .Build();

  ManagedDisplayInfo::ManagedDisplayModeList display_modes =
      DisplayChangeObserver::GetExternalManagedDisplayModeList(
          *display_snapshot);

  const bool listing_all_modes = GetParam();
  if (listing_all_modes) {
    ASSERT_EQ(13u, display_modes.size());
    EXPECT_EQ("640x480", display_modes[0].size().ToString());
    EXPECT_TRUE(display_modes[0].is_interlaced());
    EXPECT_EQ(display_modes[0].refresh_rate(), 60);

    EXPECT_EQ("1024x600", display_modes[1].size().ToString());
    EXPECT_FALSE(display_modes[1].is_interlaced());
    EXPECT_EQ(display_modes[1].refresh_rate(), 60);
    EXPECT_EQ("1024x600", display_modes[2].size().ToString());
    EXPECT_TRUE(display_modes[2].is_interlaced());
    EXPECT_EQ(display_modes[2].refresh_rate(), 60);
    EXPECT_EQ("1024x600", display_modes[3].size().ToString());
    EXPECT_FALSE(display_modes[3].is_interlaced());
    EXPECT_EQ(display_modes[3].refresh_rate(), 70);

    EXPECT_EQ("1024x768", display_modes[4].size().ToString());
    EXPECT_TRUE(display_modes[4].is_interlaced());
    EXPECT_EQ(display_modes[4].refresh_rate(), 60);
    EXPECT_EQ("1024x768", display_modes[5].size().ToString());
    EXPECT_TRUE(display_modes[5].is_interlaced());
    EXPECT_EQ(display_modes[5].refresh_rate(), 70);

    EXPECT_EQ("1280x720", display_modes[6].size().ToString());
    EXPECT_FALSE(display_modes[6].is_interlaced());
    EXPECT_EQ(display_modes[6].refresh_rate(), 60);
    EXPECT_EQ("1280x720", display_modes[7].size().ToString());
    EXPECT_TRUE(display_modes[7].is_interlaced());
    EXPECT_EQ(display_modes[7].refresh_rate(), 60);

    EXPECT_EQ("1920x1080", display_modes[8].size().ToString());
    EXPECT_FALSE(display_modes[8].is_interlaced());
    EXPECT_EQ(display_modes[8].refresh_rate(), 60);
    EXPECT_EQ("1920x1080", display_modes[9].size().ToString());
    EXPECT_FALSE(display_modes[9].is_interlaced());
    EXPECT_EQ(display_modes[9].refresh_rate(), 70);
    EXPECT_EQ("1920x1080", display_modes[10].size().ToString());
    EXPECT_FALSE(display_modes[10].is_interlaced());
    EXPECT_EQ(display_modes[10].refresh_rate(), 80);

    EXPECT_EQ("1920x1200", display_modes[11].size().ToString());
    EXPECT_FALSE(display_modes[11].is_interlaced());
    EXPECT_EQ(display_modes[11].refresh_rate(), 60);

    EXPECT_EQ("1920x1200", display_modes[12].size().ToString());
    EXPECT_FALSE(display_modes[12].is_interlaced());
    EXPECT_EQ(display_modes[12].refresh_rate(), 75);
  } else {
    ASSERT_EQ(6u, display_modes.size());
    EXPECT_EQ("640x480", display_modes[0].size().ToString());
    EXPECT_TRUE(display_modes[0].is_interlaced());
    EXPECT_EQ(display_modes[0].refresh_rate(), 60);

    EXPECT_EQ("1024x600", display_modes[1].size().ToString());
    EXPECT_FALSE(display_modes[1].is_interlaced());
    EXPECT_EQ(display_modes[1].refresh_rate(), 70);

    EXPECT_EQ("1024x768", display_modes[2].size().ToString());
    EXPECT_TRUE(display_modes[2].is_interlaced());
    EXPECT_EQ(display_modes[2].refresh_rate(), 70);

    EXPECT_EQ("1280x720", display_modes[3].size().ToString());
    EXPECT_FALSE(display_modes[3].is_interlaced());
    EXPECT_EQ(display_modes[3].refresh_rate(), 60);

    EXPECT_EQ("1920x1080", display_modes[4].size().ToString());
    EXPECT_FALSE(display_modes[4].is_interlaced());
    EXPECT_EQ(display_modes[4].refresh_rate(), 80);

    EXPECT_EQ("1920x1200", display_modes[5].size().ToString());
    EXPECT_FALSE(display_modes[5].is_interlaced());
    EXPECT_EQ(display_modes[5].refresh_rate(), 60);
  }
}

TEST_P(DisplayChangeObserverTest, GetEmptyExternalManagedDisplayModeList) {
  FakeDisplaySnapshot display_snapshot(
      123, gfx::Point(), gfx::Size(), DISPLAY_CONNECTION_TYPE_UNKNOWN, false,
      false, false, false, std::string(), {}, nullptr, nullptr, 0, gfx::Size());

  ManagedDisplayInfo::ManagedDisplayModeList display_modes =
      DisplayChangeObserver::GetExternalManagedDisplayModeList(
          display_snapshot);
  EXPECT_EQ(0u, display_modes.size());
}

TEST_P(DisplayChangeObserverTest, FindDeviceScaleFactor) {
  EXPECT_EQ(1.0f, ComputeDeviceScaleFactor(19.5f, gfx::Rect(1600, 900)));

  // 21.5" 1920x1080
  EXPECT_EQ(1.0f, ComputeDeviceScaleFactor(21.5f, gfx::Rect(1920, 1080)));

  // 10" 1920x1200
  EXPECT_NEAR(1.77778f, ComputeDeviceScaleFactor(10.f, gfx::Rect(1920, 1200)),
              std::numeric_limits<float>::epsilon());

  // 12.1" 1280x800
  EXPECT_EQ(1.0f, ComputeDeviceScaleFactor(12.1f, gfx::Rect(1280, 800)));

  // 13.3" 1920x1080
  EXPECT_EQ(1.25f, ComputeDeviceScaleFactor(13.3f, gfx::Rect(1920, 1080)));

  // 14" 1920x1080
  EXPECT_EQ(1.25f, ComputeDeviceScaleFactor(14.0f, gfx::Rect(1920, 1080)));

  // 11.6" 1920x1080
  EXPECT_EQ(1.6f, ComputeDeviceScaleFactor(11.6f, gfx::Rect(1920, 1080)));

  // 12.02" 2160x1440
  EXPECT_EQ(1.6f, ComputeDeviceScaleFactor(12.02f, gfx::Rect(2160, 1440)));

  // 12.85" 2560x1700
  EXPECT_EQ(2.0f, ComputeDeviceScaleFactor(12.85f, gfx::Rect(2560, 1700)));

  // 12.3" 2400x1600
  EXPECT_EQ(2.0f, ComputeDeviceScaleFactor(12.3f, gfx::Rect(2400, 1600)));

  // 12.3" 3000x2000
  EXPECT_EQ(2.25f, ComputeDeviceScaleFactor(12.3f, gfx::Rect(3000, 2000)));

  // 13.1" 3840x2160
  EXPECT_NEAR(2.66667f, ComputeDeviceScaleFactor(13.1f, gfx::Rect(3840, 2160)),
              std::numeric_limits<float>::epsilon());

  // Erroneous values should still work.
  EXPECT_EQ(1.0f, DisplayChangeObserver::FindDeviceScaleFactor(-100.0f));
  EXPECT_EQ(1.0f, DisplayChangeObserver::FindDeviceScaleFactor(0.0f));
  EXPECT_NEAR(2.66667f, DisplayChangeObserver::FindDeviceScaleFactor(10000.0f),
              std::numeric_limits<float>::epsilon());
}

TEST_P(DisplayChangeObserverTest,
       FindExternalDisplayNativeModeWhenOverwritten) {
  std::unique_ptr<DisplaySnapshot> display_snapshot =
      FakeDisplaySnapshot::Builder()
          .SetId(123)
          .SetNativeMode(MakeDisplayMode(1920, 1080, true, 60))
          .AddMode(MakeDisplayMode(1920, 1080, false, 60))
          .Build();

  ManagedDisplayInfo::ManagedDisplayModeList display_modes =
      DisplayChangeObserver::GetExternalManagedDisplayModeList(
          *display_snapshot);

  const bool listing_all_modes = GetParam();

  if (listing_all_modes) {
    ASSERT_EQ(2u, display_modes.size());
    EXPECT_EQ("1920x1080", display_modes[0].size().ToString());
    EXPECT_FALSE(display_modes[0].is_interlaced());
    EXPECT_FALSE(display_modes[0].native());
    EXPECT_EQ(display_modes[0].refresh_rate(), 60);

    EXPECT_EQ("1920x1080", display_modes[1].size().ToString());
    EXPECT_TRUE(display_modes[1].is_interlaced());
    EXPECT_TRUE(display_modes[1].native());
    EXPECT_EQ(display_modes[1].refresh_rate(), 60);
  } else {
    // Only the native mode will be listed.
    ASSERT_EQ(1u, display_modes.size());
    EXPECT_EQ("1920x1080", display_modes[0].size().ToString());
    EXPECT_TRUE(display_modes[0].is_interlaced());
    EXPECT_TRUE(display_modes[0].native());
    EXPECT_EQ(display_modes[0].refresh_rate(), 60);
  }
}

INSTANTIATE_TEST_SUITE_P(,
                         DisplayChangeObserverTest,
                         ::testing::Values(false, true));

}  // namespace display