ui/display/util/display_util_unittest.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/display/util/display_util.h"
   6
   7 #include "testing/gtest/include/gtest/gtest.h"
   8
   9 namespace ui {
  10
  11 TEST(DisplayUtilTest, TestBlackListedDisplay) {
  12   EXPECT_TRUE(IsDisplaySizeBlackListed(gfx::Size(10, 10)));
  13   EXPECT_TRUE(IsDisplaySizeBlackListed(gfx::Size(40, 30)));
  14   EXPECT_TRUE(IsDisplaySizeBlackListed(gfx::Size(50, 40)));
  15   EXPECT_TRUE(IsDisplaySizeBlackListed(gfx::Size(160, 90)));
  16   EXPECT_TRUE(IsDisplaySizeBlackListed(gfx::Size(160, 100)));
  17
  18   EXPECT_FALSE(IsDisplaySizeBlackListed(gfx::Size(50, 60)));
  19   EXPECT_FALSE(IsDisplaySizeBlackListed(gfx::Size(100, 70)));
  20   EXPECT_FALSE(IsDisplaySizeBlackListed(gfx::Size(272, 181)));
  21 }
  22
  23 TEST(DisplayUtilTest, GetScaleFactor) {
  24   // Normal chromebook spec. DPI ~= 130
  25   EXPECT_EQ(1.0f, GetScaleFactor(
  26       gfx::Size(256, 144), gfx::Size(1366, 768)));
  27
  28   // HiDPI like Pixel. DPI ~= 240
  29   EXPECT_EQ(2.0f, GetScaleFactor(
  30       gfx::Size(272, 181), gfx::Size(2560, 1700)));
  31
  32   // A large external display but normal pixel density. DPI ~= 100
  33   EXPECT_EQ(1.0f, GetScaleFactor(
  34       gfx::Size(641, 400), gfx::Size(2560, 1600)));
  35
  36   // A large external display with high pixel density. DPI ~= 157
  37   EXPECT_EQ(2.0f, GetScaleFactor(
  38       gfx::Size(621, 341), gfx::Size(3840, 2160)));
  39
  40   // 4K resolution but the display is physically even larger. DPI ~= 114
  41   EXPECT_EQ(1.0f, GetScaleFactor(
  42       gfx::Size(854, 481), gfx::Size(3840, 2160)));
  43
  44   // 21.5 inch, 1080p. DPI ~= 102
  45   EXPECT_EQ(1.0f, GetScaleFactor(
  46       gfx::Size(476, 267), gfx::Size(1920, 1080)));
  47
  48   // Corner case; slightly higher density but smaller screens. DPI ~= 165
  49   EXPECT_EQ(1.0f, GetScaleFactor(
  50       gfx::Size(293, 165), gfx::Size(1920, 1080)));
  51 }
  52
  53 }  // namespace ui