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// Copyright (c) 2012 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/gfx/safe_integer_conversions.h"
#include <limits>
#include "testing/gtest/include/gtest/gtest.h"
namespace gfx {
TEST(SafeIntegerConversions, ClampToInt) {
EXPECT_EQ(0, ClampToInt(std::numeric_limits<float>::quiet_NaN()));
float max = std::numeric_limits<int>::max();
float min = std::numeric_limits<int>::min();
float infinity = std::numeric_limits<float>::infinity();
int int_max = std::numeric_limits<int>::max();
int int_min = std::numeric_limits<int>::min();
EXPECT_EQ(int_max, ClampToInt(infinity));
EXPECT_EQ(int_max, ClampToInt(max));
EXPECT_EQ(int_max, ClampToInt(max + 100));
EXPECT_EQ(-100, ClampToInt(-100.5f));
EXPECT_EQ(0, ClampToInt(0));
EXPECT_EQ(100, ClampToInt(100.5f));
EXPECT_EQ(int_min, ClampToInt(-infinity));
EXPECT_EQ(int_min, ClampToInt(min));
EXPECT_EQ(int_min, ClampToInt(min - 100));
}
TEST(SafeIntegerConversions, ToFlooredInt) {
EXPECT_EQ(0, ToFlooredInt(std::numeric_limits<float>::quiet_NaN()));
float max = std::numeric_limits<int>::max();
float min = std::numeric_limits<int>::min();
float infinity = std::numeric_limits<float>::infinity();
int int_max = std::numeric_limits<int>::max();
int int_min = std::numeric_limits<int>::min();
EXPECT_EQ(int_max, ToFlooredInt(infinity));
EXPECT_EQ(int_max, ToFlooredInt(max));
EXPECT_EQ(int_max, ToFlooredInt(max + 100));
EXPECT_EQ(-101, ToFlooredInt(-100.5f));
EXPECT_EQ(0, ToFlooredInt(0));
EXPECT_EQ(100, ToFlooredInt(100.5f));
EXPECT_EQ(int_min, ToFlooredInt(-infinity));
EXPECT_EQ(int_min, ToFlooredInt(min));
EXPECT_EQ(int_min, ToFlooredInt(min - 100));
}
TEST(SafeIntegerConversions, ToCeiledInt) {
EXPECT_EQ(0, ToCeiledInt(std::numeric_limits<float>::quiet_NaN()));
float max = std::numeric_limits<int>::max();
float min = std::numeric_limits<int>::min();
float infinity = std::numeric_limits<float>::infinity();
int int_max = std::numeric_limits<int>::max();
int int_min = std::numeric_limits<int>::min();
EXPECT_EQ(int_max, ToCeiledInt(infinity));
EXPECT_EQ(int_max, ToCeiledInt(max));
EXPECT_EQ(int_max, ToCeiledInt(max + 100));
EXPECT_EQ(-100, ToCeiledInt(-100.5f));
EXPECT_EQ(0, ToCeiledInt(0));
EXPECT_EQ(101, ToCeiledInt(100.5f));
EXPECT_EQ(int_min, ToCeiledInt(-infinity));
EXPECT_EQ(int_min, ToCeiledInt(min));
EXPECT_EQ(int_min, ToCeiledInt(min - 100));
}
TEST(SafeIntegerConversions, ToRoundedInt) {
EXPECT_EQ(0, ToRoundedInt(std::numeric_limits<float>::quiet_NaN()));
float max = std::numeric_limits<int>::max();
float min = std::numeric_limits<int>::min();
float infinity = std::numeric_limits<float>::infinity();
int int_max = std::numeric_limits<int>::max();
int int_min = std::numeric_limits<int>::min();
EXPECT_EQ(int_max, ToRoundedInt(infinity));
EXPECT_EQ(int_max, ToRoundedInt(max));
EXPECT_EQ(int_max, ToRoundedInt(max + 100));
EXPECT_EQ(-100, ToRoundedInt(-100.1f));
EXPECT_EQ(-101, ToRoundedInt(-100.5f));
EXPECT_EQ(-101, ToRoundedInt(-100.9f));
EXPECT_EQ(0, ToRoundedInt(0));
EXPECT_EQ(100, ToRoundedInt(100.1f));
EXPECT_EQ(101, ToRoundedInt(100.5f));
EXPECT_EQ(101, ToRoundedInt(100.9f));
EXPECT_EQ(int_min, ToRoundedInt(-infinity));
EXPECT_EQ(int_min, ToRoundedInt(min));
EXPECT_EQ(int_min, ToRoundedInt(min - 100));
}
} // namespace gfx
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