src/ui/views/rect_based_targeting_utils_unittest.cc

   1 // Copyright 2013 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/views/rect_based_targeting_utils.h"
   6
   7 #include "testing/gtest/include/gtest/gtest.h"
   8 #include "ui/gfx/rect.h"
   9
  10 namespace views {
  11
  12 TEST(RectBasedTargetingUtils, UsePointBasedTargeting) {
  13   gfx::Rect rect_1(gfx::Point(-22, 30), gfx::Size(1, 1));
  14   gfx::Rect rect_2(gfx::Point(0, 0), gfx::Size(34, 55));
  15   gfx::Rect rect_3(gfx::Point(12, 12), gfx::Size(1, 0));
  16   gfx::Rect rect_4(gfx::Point(12, 120), gfx::Size(0, 0));
  17
  18   EXPECT_TRUE(UsePointBasedTargeting(rect_1));
  19   EXPECT_FALSE(UsePointBasedTargeting(rect_2));
  20   EXPECT_FALSE(UsePointBasedTargeting(rect_3));
  21   EXPECT_FALSE(UsePointBasedTargeting(rect_4));
  22 }
  23
  24 TEST(RectBasedTargetingUtils, PercentCoveredBy) {
  25   gfx::Rect rect_1(gfx::Point(0, 0), gfx::Size(300, 120));
  26   gfx::Rect rect_2(gfx::Point(20, 10), gfx::Size(30, 90));
  27   gfx::Rect rect_3(gfx::Point(160, 50), gfx::Size(150, 85));
  28   gfx::Rect rect_4(gfx::Point(20, 55), gfx::Size(0, 15));
  29   float error = 0.001f;
  30
  31   // Passing in identical rectangles.
  32   EXPECT_FLOAT_EQ(1.0f, PercentCoveredBy(rect_1, rect_1));
  33
  34   // |rect_1| completely contains |rect_2|.
  35   EXPECT_FLOAT_EQ(0.075f, PercentCoveredBy(rect_1, rect_2));
  36   EXPECT_FLOAT_EQ(1.0f, PercentCoveredBy(rect_2, rect_1));
  37
  38   // |rect_2| and |rect_3| do not intersect.
  39   EXPECT_FLOAT_EQ(0.0f, PercentCoveredBy(rect_2, rect_3));
  40
  41   // |rect_1| and |rect_3| have a nonzero area of intersection which
  42   // is smaller than the area of either rectangle.
  43   EXPECT_NEAR(0.272f, PercentCoveredBy(rect_1, rect_3), error);
  44   EXPECT_NEAR(0.768f, PercentCoveredBy(rect_3, rect_1), error);
  45
  46   // |rect_4| has no area.
  47   EXPECT_FLOAT_EQ(0.0f, PercentCoveredBy(rect_2, rect_4));
  48   EXPECT_FLOAT_EQ(0.0f, PercentCoveredBy(rect_4, rect_2));
  49 }
  50
  51 TEST(RectBasedTargetingUtils, DistanceSquaredFromCenterToPoint) {
  52   gfx::Rect rect_1(gfx::Point(0, 0), gfx::Size(10, 10));
  53   gfx::Rect rect_2(gfx::Point(20, 0), gfx::Size(80, 10));
  54   gfx::Rect rect_3(gfx::Point(0, 20), gfx::Size(10, 20));
  55
  56   gfx::Point point_1(5, 5);
  57   gfx::Point point_2(25, 5);
  58   gfx::Point point_3(11, 15);
  59   gfx::Point point_4(33, 44);
  60
  61   EXPECT_EQ(0, DistanceSquaredFromCenterToPoint(point_1, rect_1));
  62   EXPECT_EQ(1225, DistanceSquaredFromCenterToPoint(point_2, rect_2));
  63   EXPECT_EQ(3025, DistanceSquaredFromCenterToPoint(point_1, rect_2));
  64   EXPECT_EQ(1025, DistanceSquaredFromCenterToPoint(point_2, rect_3));
  65   EXPECT_EQ(2501, DistanceSquaredFromCenterToPoint(point_3, rect_2));
  66   EXPECT_EQ(136, DistanceSquaredFromCenterToPoint(point_3, rect_1));
  67   EXPECT_EQ(980, DistanceSquaredFromCenterToPoint(point_4, rect_3));
  68 }
  69
  70 }  // namespace views