libc/test/src/math/smoke/IsNanTest.h

//===-- Utility class to test different flavors of isnan --------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_LIBC_TEST_SRC_MATH_SMOKE_ISNANTEST_H
#define LLVM_LIBC_TEST_SRC_MATH_SMOKE_ISNANTEST_H

#include "test/UnitTest/FEnvSafeTest.h"
#include "test/UnitTest/FPMatcher.h"
#include "test/UnitTest/Test.h"

template <typename T>
class IsNanTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {

  DECLARE_SPECIAL_CONSTANTS(T)

public:
  using IsNanFunc = int (*)(T);

  void testSpecialNumbers(IsNanFunc func) {
    EXPECT_EQ(func(aNaN), 1);
    EXPECT_EQ(func(neg_aNaN), 1);
    EXPECT_EQ(func(sNaN), 1);
    EXPECT_EQ(func(neg_sNaN), 1);
    EXPECT_EQ(func(inf), 0);
    EXPECT_EQ(func(neg_inf), 0);
    EXPECT_EQ(func(min_normal), 0);
    EXPECT_EQ(func(max_normal), 0);
    EXPECT_EQ(func(neg_max_normal), 0);
    EXPECT_EQ(func(min_denormal), 0);
    EXPECT_EQ(func(neg_min_denormal), 0);
    EXPECT_EQ(func(max_denormal), 0);
    EXPECT_EQ(func(zero), 0);
    EXPECT_EQ(func(neg_zero), 0);
  }

  void testRoundedNumbers(IsNanFunc func) {
    EXPECT_EQ(func(T(1.0)), 0);
    EXPECT_EQ(func(T(-1.0)), 0);
    EXPECT_EQ(func(T(10.0)), 0);
    EXPECT_EQ(func(T(-10.0)), 0);
    EXPECT_EQ(func(T(1234.0)), 0);
    EXPECT_EQ(func(T(-1234.0)), 0);
  }
};

#define LIST_ISNAN_TESTS(T, func)                                              \
  using LlvmLibcIsNanTest = IsNanTest<T>;                                      \
  TEST_F(LlvmLibcIsNanTest, SpecialNumbers) { testSpecialNumbers(&func); }     \
  TEST_F(LlvmLibcIsNanTest, RoundedNumbers) { testRoundedNumbers(&func); }

#endif // LLVM_LIBC_TEST_SRC_MATH_SMOKE_ISNANTEST_H