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/// \file engine/test_result.hpp
/// Representation of test case results.

#if !defined(ENGINE_TEST_RESULT_HPP)
#define ENGINE_TEST_RESULT_HPP

#include <istream>
#include <ostream>
#include <string>

namespace engine {


/// Representation of a single test result.
///
/// A test result is a simple pair of (type, reason).  The type indicates the
/// semantics of the results, and the optional reason provides an extra
/// description of the result type.
///
/// In general, a 'passed' result will not have a reason attached, because a
/// successful test case does not deserve any kind of explanation.  We used to
/// special-case this with a very complex class hierarchy, but it proved to
/// result in an extremely-complex to maintain code base that provided no
/// benefits.  As a result, we allow any test type to carry a reason.
class test_result {
public:
    /// Type definitions for all possible test case results.
    enum result_type {
        broken,
        expected_failure,
        failed,
        passed,
        skipped,
    };

private:
    /// The type of the result.
    result_type _type;

    /// A description of the result; may be empty.
    std::string _reason;

public:
    test_result(const result_type, const std::string& = "");
    static test_result parse(std::istream&);

    result_type type(void) const;
    const std::string& reason(void) const;

    bool good(void) const;

    bool operator==(const test_result&) const;
    bool operator!=(const test_result&) const;
};


std::ostream& operator<<(std::ostream&, const test_result&);


}  // namespace engine


#endif  // !defined(ENGINE_TEST_RESULT_HPP)