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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/platform/geometry/math_functions.h"
#include <limits>
#include "testing/gtest/include/gtest/gtest.h"
namespace blink {
namespace {
enum class TestOperatorType {
kRoundNearest,
kRoundUp,
kRoundDown,
kRoundToZero,
kMod,
kRem,
};
TEST(MathFunctionsTest, EvaluateSteppedValueFunction_SmallB) {
struct {
double a;
double b;
double expected;
} tests[] = {
{42.0, std::numeric_limits<double>::min(), 42.0},
{42.0, std::numeric_limits<double>::denorm_min(), 42.0},
{42.0, std::numeric_limits<double>::epsilon(), 42.0},
{std::numeric_limits<double>::min(), std::numeric_limits<double>::min(),
std::numeric_limits<double>::min()},
{std::numeric_limits<double>::min(),
std::numeric_limits<double>::denorm_min(),
std::numeric_limits<double>::min()},
{std::numeric_limits<double>::min(),
std::numeric_limits<double>::epsilon(), 0.0},
{std::numeric_limits<double>::denorm_min(),
std::numeric_limits<double>::min(), 0.0},
{std::numeric_limits<double>::denorm_min(),
std::numeric_limits<double>::denorm_min(),
std::numeric_limits<double>::denorm_min()},
{std::numeric_limits<double>::denorm_min(),
std::numeric_limits<double>::epsilon(), 0.0},
{-42.0, std::numeric_limits<double>::min(), -42.0},
{-42.0, std::numeric_limits<double>::denorm_min(), -42.0},
{-42.0, std::numeric_limits<double>::epsilon(), -42.0},
{-std::numeric_limits<double>::min(), std::numeric_limits<double>::min(),
-std::numeric_limits<double>::min()},
{-std::numeric_limits<double>::min(),
std::numeric_limits<double>::denorm_min(),
-std::numeric_limits<double>::min()},
{-std::numeric_limits<double>::min(),
std::numeric_limits<double>::epsilon(), -0.0},
{-std::numeric_limits<double>::denorm_min(),
std::numeric_limits<double>::min(), -0.0},
{-std::numeric_limits<double>::denorm_min(),
std::numeric_limits<double>::denorm_min(),
-std::numeric_limits<double>::denorm_min()},
{-std::numeric_limits<double>::denorm_min(),
std::numeric_limits<double>::epsilon(), -0.0},
};
for (const auto& test : tests) {
EXPECT_EQ(EvaluateSteppedValueFunction(TestOperatorType::kRoundNearest,
test.a, test.b),
test.expected)
<< "a=" << test.a << " b=" << test.b;
}
}
} // namespace
} // namespace blink
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