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//===-- 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.uintval() == expectedBits.uintval());
// If condition == Cond_NE.
if (actualBits.isNaN())
return !expectedBits.isNaN();
return expectedBits.isNaN() ||
(actualBits.uintval() != expectedBits.uintval());
}
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);
}
// TODO: Make the matcher match specific exceptions instead of just identifying
// that an exception was raised.
class FPExceptMatcher : public __llvm_libc::testing::Matcher<bool> {
bool exceptionRaised;
public:
class FunctionCaller {
public:
virtual ~FunctionCaller(){};
virtual void call() = 0;
};
template <typename Func> static FunctionCaller *getFunctionCaller(Func func) {
struct Callable : public FunctionCaller {
Func f;
explicit Callable(Func theFunc) : f(theFunc) {}
void call() override { f(); }
};
return new Callable(func);
}
// Takes ownership of func.
explicit FPExceptMatcher(FunctionCaller *func);
bool match(bool unused) { return exceptionRaised; }
void explainError(testutils::StreamWrapper &stream) override {
stream << "A floating point exception should have been raised but it "
<< "wasn't\n";
}
};
} // namespace testing
} // namespace fputil
} // namespace __llvm_libc
#define DECLARE_SPECIAL_CONSTANTS(T) \
using FPBits = __llvm_libc::fputil::FPBits<T>; \
using UIntType = typename FPBits::UIntType; \
const T zero = T(FPBits::zero()); \
const T negZero = T(FPBits::negZero()); \
const T aNaN = T(FPBits::buildNaN(1)); \
const T inf = T(FPBits::inf()); \
const T negInf = T(FPBits::negInf());
#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))
#ifdef LLVM_LIBC_TEST_USE_FUCHSIA
#define ASSERT_RAISES_FP_EXCEPT(func) ASSERT_DEATH(func, WITH_SIGNAL(SIGFPE))
#else
#define ASSERT_RAISES_FP_EXCEPT(func) \
ASSERT_THAT( \
true, \
__llvm_libc::fputil::testing::FPExceptMatcher( \
__llvm_libc::fputil::testing::FPExceptMatcher::getFunctionCaller( \
func)))
#endif // LLVM_LIBC_TEST_USE_FUCHSIA
#endif // LLVM_LIBC_UTILS_FPUTIL_TEST_HELPERS_H
|
