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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/gfx/geometry/vector2d.h"
#include <stddef.h>
#include <cmath>
#include <limits>
#include "testing/gtest/include/gtest/gtest.h"
namespace gfx {
TEST(Vector2dTest, IsZero) {
EXPECT_TRUE(Vector2d().IsZero());
EXPECT_TRUE(Vector2d(0, 0).IsZero());
EXPECT_FALSE(Vector2d(1, 0).IsZero());
EXPECT_FALSE(Vector2d(0, -2).IsZero());
EXPECT_FALSE(Vector2d(1, -2).IsZero());
}
TEST(Vector2dTest, Add) {
Vector2d i1(3, 5);
Vector2d i2(4, -1);
EXPECT_EQ(Vector2d(3, 5), i1 + Vector2d());
EXPECT_EQ(Vector2d(3 + 4, 5 - 1), i1 + i2);
EXPECT_EQ(Vector2d(3 - 4, 5 + 1), i1 - i2);
}
TEST(Vector2dTest, Negative) {
EXPECT_EQ(Vector2d(0, 0), -Vector2d(0, 0));
EXPECT_EQ(Vector2d(-3, -3), -Vector2d(3, 3));
EXPECT_EQ(Vector2d(3, 3), -Vector2d(-3, -3));
EXPECT_EQ(Vector2d(-3, 3), -Vector2d(3, -3));
EXPECT_EQ(Vector2d(3, -3), -Vector2d(-3, 3));
}
TEST(Vector2dTest, Length) {
int values[][2] = {
{0, 0}, {10, 20}, {20, 10}, {-10, -20}, {-20, 10}, {10, -20},
};
for (auto& value : values) {
int v0 = value[0];
int v1 = value[1];
double length_squared =
static_cast<double>(v0) * v0 + static_cast<double>(v1) * v1;
double length = std::sqrt(length_squared);
Vector2d vector(v0, v1);
EXPECT_EQ(static_cast<float>(length_squared), vector.LengthSquared());
EXPECT_EQ(static_cast<float>(length), vector.Length());
}
}
TEST(Vector2dTest, SetToMinMax) {
Vector2d a;
a = Vector2d(3, 5);
EXPECT_EQ(Vector2d(3, 5), a);
a.SetToMax(Vector2d(2, 4));
EXPECT_EQ(Vector2d(3, 5), a);
a.SetToMax(Vector2d(3, 5));
EXPECT_EQ(Vector2d(3, 5), a);
a.SetToMax(Vector2d(4, 2));
EXPECT_EQ(Vector2d(4, 5), a);
a.SetToMax(Vector2d(8, 10));
EXPECT_EQ(Vector2d(8, 10), a);
a.SetToMin(Vector2d(9, 11));
EXPECT_EQ(Vector2d(8, 10), a);
a.SetToMin(Vector2d(8, 10));
EXPECT_EQ(Vector2d(8, 10), a);
a.SetToMin(Vector2d(11, 9));
EXPECT_EQ(Vector2d(8, 9), a);
a.SetToMin(Vector2d(7, 11));
EXPECT_EQ(Vector2d(7, 9), a);
a.SetToMin(Vector2d(3, 5));
EXPECT_EQ(Vector2d(3, 5), a);
}
TEST(Vector2dTest, IntegerOverflow) {
int int_max = std::numeric_limits<int>::max();
int int_min = std::numeric_limits<int>::min();
Vector2d max_vector(int_max, int_max);
Vector2d min_vector(int_min, int_min);
Vector2d test;
test = Vector2d();
test += Vector2d(int_max, int_max);
EXPECT_EQ(test, max_vector);
test = Vector2d();
test += Vector2d(int_min, int_min);
EXPECT_EQ(test, min_vector);
test = Vector2d(10, 20);
test += Vector2d(int_max, int_max);
EXPECT_EQ(test, max_vector);
test = Vector2d(-10, -20);
test += Vector2d(int_min, int_min);
EXPECT_EQ(test, min_vector);
test = Vector2d();
test -= Vector2d(int_max, int_max);
EXPECT_EQ(test, Vector2d(-int_max, -int_max));
test = Vector2d();
test -= Vector2d(int_min, int_min);
EXPECT_EQ(test, max_vector);
test = Vector2d(10, 20);
test -= Vector2d(int_min, int_min);
EXPECT_EQ(test, max_vector);
test = Vector2d(-10, -20);
test -= Vector2d(int_max, int_max);
EXPECT_EQ(test, min_vector);
test = Vector2d();
test -= Vector2d(int_min, int_min);
EXPECT_EQ(test, max_vector);
test = -Vector2d(int_min, int_min);
EXPECT_EQ(test, max_vector);
}
TEST(Vector2dTest, Transpose) {
gfx::Vector2d v(1, -2);
EXPECT_EQ(gfx::Vector2d(-2, 1), TransposeVector2d(v));
v.Transpose();
EXPECT_EQ(gfx::Vector2d(-2, 1), v);
}
} // namespace gfx
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