1 // Copyright (c) 2012 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/gfx/geometry/safe_integer_conversions.h"
6
7 #include <limits>
8
9 #include "testing/gtest/include/gtest/gtest.h"
10
11 namespace gfx {
12
TEST(SafeIntegerConversions,ToFlooredInt)13 TEST(SafeIntegerConversions, ToFlooredInt) {
14 float max = std::numeric_limits<int>::max();
15 float min = std::numeric_limits<int>::min();
16 float infinity = std::numeric_limits<float>::infinity();
17
18 int int_max = std::numeric_limits<int>::max();
19 int int_min = std::numeric_limits<int>::min();
20
21 EXPECT_EQ(int_max, ToFlooredInt(infinity));
22 EXPECT_EQ(int_max, ToFlooredInt(max));
23 EXPECT_EQ(int_max, ToFlooredInt(max + 100));
24
25 EXPECT_EQ(-101, ToFlooredInt(-100.5f));
26 EXPECT_EQ(0, ToFlooredInt(0.f));
27 EXPECT_EQ(100, ToFlooredInt(100.5f));
28
29 EXPECT_EQ(int_min, ToFlooredInt(-infinity));
30 EXPECT_EQ(int_min, ToFlooredInt(min));
31 EXPECT_EQ(int_min, ToFlooredInt(min - 100));
32 }
33
TEST(SafeIntegerConversions,ToCeiledInt)34 TEST(SafeIntegerConversions, ToCeiledInt) {
35 float max = std::numeric_limits<int>::max();
36 float min = std::numeric_limits<int>::min();
37 float infinity = std::numeric_limits<float>::infinity();
38
39 int int_max = std::numeric_limits<int>::max();
40 int int_min = std::numeric_limits<int>::min();
41
42 EXPECT_EQ(int_max, ToCeiledInt(infinity));
43 EXPECT_EQ(int_max, ToCeiledInt(max));
44 EXPECT_EQ(int_max, ToCeiledInt(max + 100));
45
46 EXPECT_EQ(-100, ToCeiledInt(-100.5f));
47 EXPECT_EQ(0, ToCeiledInt(0.f));
48 EXPECT_EQ(101, ToCeiledInt(100.5f));
49
50 EXPECT_EQ(int_min, ToCeiledInt(-infinity));
51 EXPECT_EQ(int_min, ToCeiledInt(min));
52 EXPECT_EQ(int_min, ToCeiledInt(min - 100));
53 }
54
TEST(SafeIntegerConversions,ToRoundedInt)55 TEST(SafeIntegerConversions, ToRoundedInt) {
56 float max = std::numeric_limits<int>::max();
57 float min = std::numeric_limits<int>::min();
58 float infinity = std::numeric_limits<float>::infinity();
59
60 int int_max = std::numeric_limits<int>::max();
61 int int_min = std::numeric_limits<int>::min();
62
63 EXPECT_EQ(int_max, ToRoundedInt(infinity));
64 EXPECT_EQ(int_max, ToRoundedInt(max));
65 EXPECT_EQ(int_max, ToRoundedInt(max + 100));
66
67 EXPECT_EQ(-100, ToRoundedInt(-100.1f));
68 EXPECT_EQ(-101, ToRoundedInt(-100.5f));
69 EXPECT_EQ(-101, ToRoundedInt(-100.9f));
70 EXPECT_EQ(0, ToRoundedInt(0.f));
71 EXPECT_EQ(100, ToRoundedInt(100.1f));
72 EXPECT_EQ(101, ToRoundedInt(100.5f));
73 EXPECT_EQ(101, ToRoundedInt(100.9f));
74
75 EXPECT_EQ(int_min, ToRoundedInt(-infinity));
76 EXPECT_EQ(int_min, ToRoundedInt(min));
77 EXPECT_EQ(int_min, ToRoundedInt(min - 100));
78 }
79
80 } // namespace gfx
81