1 files changed, 53 insertions, 0 deletions
diff --git a/chromium/ui/display/util/display_util_unittest.cc b/chromium/ui/display/util/display_util_unittest.cc
new file mode 100644
index 00000000000..ddb4a1cd078
--- /dev/null
+++ b/chromium/ui/display/util/display_util_unittest.cc
@@ -0,0 +1,53 @@
+// Copyright 2014 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/util/display_util.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace ui {
+
+TEST(DisplayUtilTest, TestBlackListedDisplay) {
+  EXPECT_TRUE(IsDisplaySizeBlackListed(gfx::Size(10, 10)));
+  EXPECT_TRUE(IsDisplaySizeBlackListed(gfx::Size(40, 30)));
+  EXPECT_TRUE(IsDisplaySizeBlackListed(gfx::Size(50, 40)));
+  EXPECT_TRUE(IsDisplaySizeBlackListed(gfx::Size(160, 90)));
+  EXPECT_TRUE(IsDisplaySizeBlackListed(gfx::Size(160, 100)));
+
+  EXPECT_FALSE(IsDisplaySizeBlackListed(gfx::Size(50, 60)));
+  EXPECT_FALSE(IsDisplaySizeBlackListed(gfx::Size(100, 70)));
+  EXPECT_FALSE(IsDisplaySizeBlackListed(gfx::Size(272, 181)));
+}
+
+TEST(DisplayUtilTest, GetScaleFactor) {
+  // Normal chromebook spec. DPI ~= 130
+  EXPECT_EQ(1.0f, GetScaleFactor(
+      gfx::Size(256, 144), gfx::Size(1366, 768)));
+
+  // HiDPI like Pixel. DPI ~= 240
+  EXPECT_EQ(2.0f, GetScaleFactor(
+      gfx::Size(272, 181), gfx::Size(2560, 1700)));
+
+  // A large external display but normal pixel density. DPI ~= 100
+  EXPECT_EQ(1.0f, GetScaleFactor(
+      gfx::Size(641, 400), gfx::Size(2560, 1600)));
+
+  // A large external display with high pixel density. DPI ~= 157
+  EXPECT_EQ(2.0f, GetScaleFactor(
+      gfx::Size(621, 341), gfx::Size(3840, 2160)));
+
+  // 4K resolution but the display is physically even larger. DPI ~= 114
+  EXPECT_EQ(1.0f, GetScaleFactor(
+      gfx::Size(854, 481), gfx::Size(3840, 2160)));
+
+  // 21.5 inch, 1080p. DPI ~= 102
+  EXPECT_EQ(1.0f, GetScaleFactor(
+      gfx::Size(476, 267), gfx::Size(1920, 1080)));
+
+  // Corner case; slightly higher density but smaller screens. DPI ~= 165
+  EXPECT_EQ(1.0f, GetScaleFactor(
+      gfx::Size(293, 165), gfx::Size(1920, 1080)));
+}
+
+}  // namespace ui