Test.h
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//===-- Base class for libc unittests ---------------------------*- 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_UNITTEST_H
#define LLVM_LIBC_UTILS_UNITTEST_H
// This file can only include headers from utils/CPP/ or utils/testutils. No
// other headers should be included.
#include "utils/CPP/TypeTraits.h"
#include "utils/testutils/ExecuteFunction.h"
#include "utils/testutils/StreamWrapper.h"
namespace __llvm_libc {
namespace testing {
class RunContext;
// Only the following conditions are supported. Notice that we do not have
// a TRUE or FALSE condition. That is because, C library funtions do not
// return boolean values, but use integral return values to indicate true or
// false conditions. Hence, it is more appropriate to use the other comparison
// conditions for such cases.
enum TestCondition {
Cond_None,
Cond_EQ,
Cond_NE,
Cond_LT,
Cond_LE,
Cond_GT,
Cond_GE,
};
namespace internal {
template <typename ValType>
bool test(RunContext &Ctx, TestCondition Cond, ValType LHS, ValType RHS,
const char *LHSStr, const char *RHSStr, const char *File,
unsigned long Line);
} // namespace internal
struct MatcherBase {
virtual ~MatcherBase() {}
virtual void explainError(testutils::StreamWrapper &OS) {
OS << "unknown error\n";
}
};
template <typename T> struct Matcher : public MatcherBase { bool match(T &t); };
// NOTE: One should not create instances and call methods on them directly. One
// should use the macros TEST or TEST_F to write test cases.
class Test {
private:
Test *Next = nullptr;
public:
virtual ~Test() {}
virtual void SetUp() {}
virtual void TearDown() {}
static int runTests();
protected:
static void addTest(Test *T);
// We make use of a template function, with |LHS| and |RHS| as explicit
// parameters, for enhanced type checking. Other gtest like unittest
// frameworks have a similar function which takes a boolean argument
// instead of the explicit |LHS| and |RHS| arguments. This boolean argument
// is the result of the |Cond| operation on |LHS| and |RHS|. Though not bad,
// |Cond| on mismatched |LHS| and |RHS| types can potentially succeed because
// of type promotion.
template <typename ValType,
cpp::EnableIfType<cpp::IsIntegral<ValType>::Value, ValType> = 0>
static bool test(RunContext &Ctx, TestCondition Cond, ValType LHS,
ValType RHS, const char *LHSStr, const char *RHSStr,
const char *File, unsigned long Line) {
return internal::test(Ctx, Cond, LHS, RHS, LHSStr, RHSStr, File, Line);
}
template <
typename ValType,
cpp::EnableIfType<cpp::IsPointerType<ValType>::Value, ValType> = nullptr>
static bool test(RunContext &Ctx, TestCondition Cond, ValType LHS,
ValType RHS, const char *LHSStr, const char *RHSStr,
const char *File, unsigned long Line) {
return internal::test(Ctx, Cond, (unsigned long long)LHS,
(unsigned long long)RHS, LHSStr, RHSStr, File, Line);
}
static bool testStrEq(RunContext &Ctx, const char *LHS, const char *RHS,
const char *LHSStr, const char *RHSStr,
const char *File, unsigned long Line);
static bool testStrNe(RunContext &Ctx, const char *LHS, const char *RHS,
const char *LHSStr, const char *RHSStr,
const char *File, unsigned long Line);
static bool testMatch(RunContext &Ctx, bool MatchResult, MatcherBase &Matcher,
const char *LHSStr, const char *RHSStr,
const char *File, unsigned long Line);
static bool testProcessExits(RunContext &Ctx, testutils::FunctionCaller *Func,
int ExitCode, const char *LHSStr,
const char *RHSStr, const char *File,
unsigned long Line);
static bool testProcessKilled(RunContext &Ctx,
testutils::FunctionCaller *Func, int Signal,
const char *LHSStr, const char *RHSStr,
const char *File, unsigned long Line);
template <typename Func> testutils::FunctionCaller *createCallable(Func f) {
struct Callable : public testutils::FunctionCaller {
Func f;
Callable(Func f) : f(f) {}
void operator()() override { f(); }
};
return new Callable(f);
}
private:
virtual void Run(RunContext &Ctx) = 0;
virtual const char *getName() const = 0;
static Test *Start;
static Test *End;
};
} // namespace testing
} // namespace __llvm_libc
#define TEST(SuiteName, TestName) \
class SuiteName##_##TestName : public __llvm_libc::testing::Test { \
public: \
SuiteName##_##TestName() { addTest(this); } \
void Run(__llvm_libc::testing::RunContext &) override; \
const char *getName() const override { return #SuiteName "." #TestName; } \
}; \
SuiteName##_##TestName SuiteName##_##TestName##_Instance; \
void SuiteName##_##TestName::Run(__llvm_libc::testing::RunContext &Ctx)
#define TEST_F(SuiteClass, TestName) \
class SuiteClass##_##TestName : public SuiteClass { \
public: \
SuiteClass##_##TestName() { addTest(this); } \
void Run(__llvm_libc::testing::RunContext &) override; \
const char *getName() const override { return #SuiteClass "." #TestName; } \
}; \
SuiteClass##_##TestName SuiteClass##_##TestName##_Instance; \
void SuiteClass##_##TestName::Run(__llvm_libc::testing::RunContext &Ctx)
#define EXPECT_EQ(LHS, RHS) \
__llvm_libc::testing::Test::test(Ctx, __llvm_libc::testing::Cond_EQ, (LHS), \
(RHS), #LHS, #RHS, __FILE__, __LINE__)
#define ASSERT_EQ(LHS, RHS) \
if (!EXPECT_EQ(LHS, RHS)) \
return
#define EXPECT_NE(LHS, RHS) \
__llvm_libc::testing::Test::test(Ctx, __llvm_libc::testing::Cond_NE, (LHS), \
(RHS), #LHS, #RHS, __FILE__, __LINE__)
#define ASSERT_NE(LHS, RHS) \
if (!EXPECT_NE(LHS, RHS)) \
return
#define EXPECT_LT(LHS, RHS) \
__llvm_libc::testing::Test::test(Ctx, __llvm_libc::testing::Cond_LT, (LHS), \
(RHS), #LHS, #RHS, __FILE__, __LINE__)
#define ASSERT_LT(LHS, RHS) \
if (!EXPECT_LT(LHS, RHS)) \
return
#define EXPECT_LE(LHS, RHS) \
__llvm_libc::testing::Test::test(Ctx, __llvm_libc::testing::Cond_LE, (LHS), \
(RHS), #LHS, #RHS, __FILE__, __LINE__)
#define ASSERT_LE(LHS, RHS) \
if (!EXPECT_LE(LHS, RHS)) \
return
#define EXPECT_GT(LHS, RHS) \
__llvm_libc::testing::Test::test(Ctx, __llvm_libc::testing::Cond_GT, (LHS), \
(RHS), #LHS, #RHS, __FILE__, __LINE__)
#define ASSERT_GT(LHS, RHS) \
if (!EXPECT_GT(LHS, RHS)) \
return
#define EXPECT_GE(LHS, RHS) \
__llvm_libc::testing::Test::test(Ctx, __llvm_libc::testing::Cond_GE, (LHS), \
(RHS), #LHS, #RHS, __FILE__, __LINE__)
#define ASSERT_GE(LHS, RHS) \
if (!EXPECT_GE(LHS, RHS)) \
return
#define EXPECT_STREQ(LHS, RHS) \
__llvm_libc::testing::Test::testStrEq(Ctx, (LHS), (RHS), #LHS, #RHS, \
__FILE__, __LINE__)
#define ASSERT_STREQ(LHS, RHS) \
if (!EXPECT_STREQ(LHS, RHS)) \
return
#define EXPECT_STRNE(LHS, RHS) \
__llvm_libc::testing::Test::testStrNe(Ctx, (LHS), (RHS), #LHS, #RHS, \
__FILE__, __LINE__)
#define ASSERT_STRNE(LHS, RHS) \
if (!EXPECT_STRNE(LHS, RHS)) \
return
#define EXPECT_TRUE(VAL) EXPECT_EQ((VAL), true)
#define ASSERT_TRUE(VAL) \
if (!EXPECT_TRUE(VAL)) \
return
#define EXPECT_FALSE(VAL) EXPECT_EQ((VAL), false)
#define ASSERT_FALSE(VAL) \
if (!EXPECT_FALSE(VAL)) \
return
#define EXPECT_EXITS(FUNC, EXIT) \
__llvm_libc::testing::Test::testProcessExits( \
Ctx, __llvm_libc::testing::Test::createCallable(FUNC), EXIT, #FUNC, \
#EXIT, __FILE__, __LINE__)
#define ASSERT_EXITS(FUNC, EXIT) \
if (!EXPECT_EXITS(FUNC, EXIT)) \
return
#define EXPECT_DEATH(FUNC, SIG) \
__llvm_libc::testing::Test::testProcessKilled( \
Ctx, __llvm_libc::testing::Test::createCallable(FUNC), SIG, #FUNC, #SIG, \
__FILE__, __LINE__)
#define ASSERT_DEATH(FUNC, EXIT) \
if (!EXPECT_DEATH(FUNC, EXIT)) \
return
#define __CAT1(a, b) a##b
#define __CAT(a, b) __CAT1(a, b)
#define UNIQUE_VAR(prefix) __CAT(prefix, __LINE__)
#define EXPECT_THAT(MATCH, MATCHER) \
do { \
auto UNIQUE_VAR(__matcher) = (MATCHER); \
__llvm_libc::testing::Test::testMatch( \
Ctx, UNIQUE_VAR(__matcher).match((MATCH)), UNIQUE_VAR(__matcher), \
#MATCH, #MATCHER, __FILE__, __LINE__); \
} while (0)
#define ASSERT_THAT(MATCH, MATCHER) \
do { \
auto UNIQUE_VAR(__matcher) = (MATCHER); \
if (!__llvm_libc::testing::Test::testMatch( \
Ctx, UNIQUE_VAR(__matcher).match((MATCH)), UNIQUE_VAR(__matcher), \
#MATCH, #MATCHER, __FILE__, __LINE__)) \
return; \
} while (0)
#endif // LLVM_LIBC_UTILS_UNITTEST_H