libc/test/src/stdfix/AbsTest.h

   1 //===-- Utility class to test fixed-point abs -------------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "test/UnitTest/Test.h"
  10
  11 #include "src/__support/fixed_point/fx_rep.h"
  12
  13 template <typename T> class AbsTest : public LIBC_NAMESPACE::testing::Test {
  14
  15   using FXRep = LIBC_NAMESPACE::fixed_point::FXRep<T>;
  16   static constexpr T zero = FXRep::ZERO();
  17   static constexpr T min = FXRep::MIN();
  18   static constexpr T max = FXRep::MAX();
  19   static constexpr T half = static_cast<T>(0.5);
  20   static constexpr T neg_half = static_cast<T>(-0.5);
  21
  22 public:
  23   typedef T (*AbsFunc)(T);
  24
  25   void testSpecialNumbers(AbsFunc func) {
  26     EXPECT_EQ(zero, func(zero));
  27     EXPECT_EQ(max, func(min));
  28     EXPECT_EQ(max, func(max));
  29     EXPECT_EQ(half, func(half));
  30     EXPECT_EQ(half, func(neg_half));
  31   }
  32 };
  33
  34 #define LIST_ABS_TESTS(T, func)                                                \
  35   using LlvmLibcAbsTest = AbsTest<T>;                                          \
  36   TEST_F(LlvmLibcAbsTest, SpecialNumbers) { testSpecialNumbers(&func); }       \
  37   static_assert(true, "Require semicolon.")