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/// \file engine/drivers/list_tests.hpp
/// Driver to obtain a list of test cases out of a test suite.
///
/// This driver module implements the logic to extract a list of test cases out
/// of a particular test suite.

#if !defined(ENGINE_DRIVERS_LIST_TESTS_HPP)
#define ENGINE_DRIVERS_LIST_TESTS_HPP

#include <set>

#include "engine/filters.hpp"
#include "engine/test_case.hpp"
#include "engine/test_program.hpp"
#include "utils/fs/path.hpp"
#include "utils/optional.hpp"

namespace engine {
namespace drivers {
namespace list_tests {


/// Abstract definition of the hooks for this driver.
class base_hooks {
public:
    virtual ~base_hooks(void) = 0;

    /// Called when a test case is identified in a test suite.
    ///
    /// \param test_case The data describing the test case.
    virtual void got_test_case(const engine::test_case& test_case) = 0;
};


/// Tuple containing the results of this driver.
class result {
public:
    /// Filters that did not match any available test case.
    ///
    /// The presence of any filters here probably indicates a usage error.  If a
    /// test filter does not match any test case, it is probably a typo.
    std::set< test_filter > unused_filters;

    /// Initializer for the tuple's fields.
    ///
    /// \param unused_filters_ The filters that did not match any test case.
    result(const std::set< test_filter >& unused_filters_) :
        unused_filters(unused_filters_)
    {
    }
};


result drive(const utils::fs::path&, const utils::optional< utils::fs::path >,
             const std::set< test_filter >&, base_hooks&);


}  // namespace list_tests
}  // namespace drivers
}  // namespace engine

#endif  // !defined(ENGINE_DRIVERS_LIST_TESTS_HPP)