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#ifndef PseudoUnitTest_h
#define PseudoUnitTest_h
#include "options.h"
#include <functional>
#include <iostream>
#include <sstream>
/** Helper to perform multiple checks within the same `ctest` test.
* Checks are performed using the various overloads of `operator()`
* and their results are logged and tracked so that the `result()` method
* will return `EXIT_FAILURE` if any of them failed (and `EXIT_SUCCESS` otherwise).
*/
class PseudoUnitTest
{
public:
/** test a boolean condition */
void operator()(const std::string& label, bool condition)
{
this->record(condition, label);
}
/** test the execution of a function */
template<typename F>
void operator()(const std::string& label, F function)
{
this->testFunction<Dummy>(label, function);
}
/** test the execution of a function expecting a given exception */
template<typename E, typename F>
void expect(const std::string& label, F function)
{
this->testFunction<E>(label, function);
}
/** test the equality of two values with `==` */
template<typename T1, typename T2>
void operator()(const std::string& label, const T1& actual, const T2& expected)
{
const bool success = actual == expected;
this->record(success, label, this->comparisonMessage(actual, expected, success ? "==" : "!="));
}
/** test the equality of two values with a comparator */
template<typename T1, typename T2, typename F>
void operator()(const std::string& label, const T1& actual, const T2& expected, F comparator)
{
const bool success = comparator(actual, expected);
this->record(success, label, this->comparisonMessage(actual, expected, success ? "~=" : "!="));
}
int result()
{
const bool success = this->failCount == 0;
return success ? EXIT_SUCCESS : EXIT_FAILURE;
}
private:
size_t failCount = 0;
size_t passCount = 0;
/* execute `function` and:
* - *pass* on normal termination when `E` is `Dummy`
* - *fail* on normal termination when `E` is any other exception
* - *pass* when an exception of type `E` is caught
* - *fail* when anything else is caught
*/
template<typename E, typename F>
void testFunction(const std::string& label, F function)
{
try
{
function();
if (std::is_same<E, Dummy>::value)
{
this->record(true, label);
}
else
{
this->record(false, label, "did not throw");
}
}
catch (const E& e)
{
this->record(true, label, e.what());
}
catch (const char* msg)
{
this->record(false, label, msg);
}
catch (const std::string& msg)
{
this->record(false, label, msg);
}
catch (const std::exception& e)
{
this->record(false, label, std::string("unexpected exception (") + e.what() + ")");
}
catch (...)
{
this->record(false, label, "unexpected exception");
}
}
void record(const bool success, const std::string& label, const std::string& message = "")
{
(success ? passCount : failCount)++;
this->log(success, label, message);
}
template<typename T>
std::string toString(const T& value)
{
std::stringstream ss;
ss << value;
return ss.str();
}
template<typename T>
std::string toString(const std::vector<T>& value)
{
std::stringstream ss;
size_t i = 0;
for (const T& item : value)
{
ss << (i++ ? ", " : "{ ") << this->toString(item);
}
ss << " }";
return ss.str();
}
protected:
template<typename T1, typename T2>
std::string comparisonMessage(const T1& actual, const T2& expected, const std::string& comp)
{
const std::string actualStr = this->toString(actual);
const std::string expectedStr = this->toString(expected);
if (actualStr != expectedStr)
{
std::stringstream ss;
ss << actualStr << " " << comp << " " << expectedStr;
return ss.str();
}
else
{
return "";
}
}
virtual void log(const bool success, const std::string& label, const std::string& message)
{
const std::string line = message.empty() ? label : (label + ": " + message);
const std::string icon = success ? u8"\u2714" : u8"\u2718";
(success ? std::cout : std::cerr) << icon << " " << line << std::endl;
}
private:
class Dummy : public std::exception
{
};
};
#endif
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