llvm-capstone/libc/utils/FPUtil/TestHelpers.h
Siva Chandra Reddy db936e0e91 [libc][NFC] Add library of floating point test matchers.
This eliminates UnitTest's dependency on FPUtil and hence prevents
non-math tests from depending indirectly on FPUtil. The patch
essentially moves some of the existing pieces into a library of its own.

Along the way, renamed add_math_unittest to add_fp_unittest.

Reviewed By: lntue

Differential Revision: https://reviews.llvm.org/D85486
2020-08-07 23:34:15 -07:00

93 lines
3.6 KiB
C++

//===-- TestMatchers.h ------------------------------------------*- 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_UTILS_FPUTIL_TEST_HELPERS_H
#define LLVM_LIBC_UTILS_FPUTIL_TEST_HELPERS_H
#include "FPBits.h"
#include "utils/UnitTest/Test.h"
namespace __llvm_libc {
namespace fputil {
namespace testing {
template <typename ValType>
cpp::EnableIfType<cpp::IsFloatingPointType<ValType>::Value, void>
describeValue(const char *label, ValType value,
testutils::StreamWrapper &stream);
template <typename T, __llvm_libc::testing::TestCondition Condition>
class FPMatcher : public __llvm_libc::testing::Matcher<T> {
static_assert(__llvm_libc::cpp::IsFloatingPointType<T>::Value,
"FPMatcher can only be used with floating point values.");
static_assert(Condition == __llvm_libc::testing::Cond_EQ ||
Condition == __llvm_libc::testing::Cond_NE,
"Unsupported FPMathcer test condition.");
T expected;
T actual;
public:
FPMatcher(T expectedValue) : expected(expectedValue) {}
bool match(T actualValue) {
actual = actualValue;
fputil::FPBits<T> actualBits(actual), expectedBits(expected);
if (Condition == __llvm_libc::testing::Cond_EQ)
return (actualBits.isNaN() && expectedBits.isNaN()) ||
(actualBits.bitsAsUInt() == expectedBits.bitsAsUInt());
// If condition == Cond_NE.
if (actualBits.isNaN())
return !expectedBits.isNaN();
return expectedBits.isNaN() ||
(actualBits.bitsAsUInt() != expectedBits.bitsAsUInt());
}
void explainError(testutils::StreamWrapper &stream) override {
describeValue("Expected floating point value: ", expected, stream);
describeValue(" Actual floating point value: ", actual, stream);
}
};
template <__llvm_libc::testing::TestCondition C, typename T>
FPMatcher<T, C> getMatcher(T expectedValue) {
return FPMatcher<T, C>(expectedValue);
}
} // namespace testing
} // namespace fputil
} // namespace __llvm_libc
#define EXPECT_FP_EQ(expected, actual) \
EXPECT_THAT( \
actual, \
__llvm_libc::fputil::testing::getMatcher<__llvm_libc::testing::Cond_EQ>( \
expected))
#define ASSERT_FP_EQ(expected, actual) \
ASSERT_THAT( \
actual, \
__llvm_libc::fputil::testing::getMatcher<__llvm_libc::testing::Cond_EQ>( \
expected))
#define EXPECT_FP_NE(expected, actual) \
EXPECT_THAT( \
actual, \
__llvm_libc::fputil::testing::getMatcher<__llvm_libc::testing::Cond_NE>( \
expected))
#define ASSERT_FP_NE(expected, actual) \
ASSERT_THAT( \
actual, \
__llvm_libc::fputil::testing::getMatcher<__llvm_libc::testing::Cond_NE>( \
expected))
#endif // LLVM_LIBC_UTILS_FPUTIL_TEST_HELPERS_H