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#ifndef PatternistSDK_TestBaseLine_H

#define PatternistSDK_TestBaseLine_H

#include <QString>

#include "Global.h"

#include "TestResult.h"

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

class QDomNamedNodeMap;

class QDomNode;

class QDomNodeList;

template<typename T> class QList;

namespace QPatternistSDK

{

    /**

     * @short Represents an expected test result for a test case.

     *

     * TestBaseLine represents a valid outcome for a test case,

     * the "base line". A XQTS test case can have many different valid

     * base lines, and one TestBaseLine instance represents on of them.

     *

     * Of highest interest, TestBaseLine have the function scan() and

     * scanErrors(), which allows serialized output to be

     * compared to the base line.

     *

     * @ingroup PatternistSDK

     * @author Frans Englich <frans.englich@nokia.com>

     */

    class Q_PATTERNISTSDK_EXPORT TestBaseLine

    {

    public:

        typedef QList<TestBaseLine *> List;

        /**

         * Identifies what kind of comparator to use. The documentation

         * for each enumerator is copied from

         * <a href="http://www.w3.org/XML/Query/test-suite/Guidelines

         * for Running the XML Query Test Suite.html">Guidelines

         * for Running the XML Query Test Suite</a>

         */

        enum Type

        {

            /**

             * The test harness must canonicalize both, the actual result

             * and the expected result according to the "Canonical XML" recommendation [2],

             * which refers to a number of open-source implementations. Byte-comparison can

             * then be applied to the resulting XML documents. If the test harness does

             * this process in a different manner, it must be documented.

             */

            XML,

            /**

             * For XML fragments, the same root node must be created for both,

             * implementation result and test suite result. The resulting XML

             * can be compared using XML comparison.

             */

            Fragment,

            /**

             * Text (that has been produced by XML serialization) is compared

             * using byte-comparison.

             */

            Text,

            /**

             * No comparison needs to be applied; the result is always @c true if

             * the implementation successfully executes the test case.

             */

            Ignore,

            /**

             * A human is required to make the call about correctness of the result

             * according to the description in the test case.

             */

            Inspect,

            /**

             * The expected result of the test case is an error, identified as an

             * eight-character error code (e.g., XPST0003). The result of a test is

             * @c true, if the implementation raises an error. However, raising an error

             * because an implementation does not support the feature is not

             * considered a correct result.

             */

            ExpectedError,

            /**

             * A special comparison for the schema validation tests. The details

             * can only be 'true' or 'false' depending on whether it is a valid

             * schema or not.

             */

            SchemaIsValid

        };

        /**

         * Takes a string identifying a comparator either in the XSL-T or the

         * XQuery test suite, and returns an enum value for it.

         *

         * If the value is unknown, the code asserts.

         */

        static Type identifierFromString(const QString &string);

        /**

         * @returns a display name for @p id. For example, if Inspect was passed, "Inspect"

         * would be returned.

         */

        static QString displayName(const Type id);

        /**

         * Compares @p items(typically the result of an evaluation) against

         * the base lines @p lines.

         *

         * @returns the status of the first base line which passes,

         * otherwise TestResult::Fail.

         */

        static TestResult::Status scan(const QString &serialized,

                                       const TestBaseLine::List &lines);

        static TestResult::Status scanErrors(const ErrorHandler::Message::List &errors,

                                             const TestBaseLine::List &lines);

        /**

         * Constructs a TestBaseLine of type @p type.

         */

        TestBaseLine(const Type type);

        /**

         * What @p details contains depends on the type(). If the type() is ExpectedError,

         * @p details contains the relevant error code. If the type() is one which compares

         * result against a base line, it is a filename locating the baseline.

         */

        void setDetails(const QString &details);

        Type type() const;

        QString details() const;

        void toXML(XMLWriter &receiver) const;

    protected:

        TestResult::Status verify(const QString &serializedInput) const;

    private:

        static bool isDeepEqual(const QDomNode &n1, const QDomNode &n2);

        /**

         * @returns @c true if the nodes in @p cl1 are equal to @p cl2, by calling isDeepEqual()

         * for each pair.

         */

        static bool isChildrenDeepEqual(const QDomNodeList &cl1, const QDomNodeList &cl2);

        /**

         * Considers @p cl1 and @p cl2 to be lists containing attributes. The list are equal

         * if they contain attributes by same value and name, but regardless of order.

         */

        static bool isAttributesEqual(const QDomNamedNodeMap &cl1, const QDomNamedNodeMap &cl2);

        const Type m_type;

        QString m_details;

    };

}

QT_END_NAMESPACE

QT_END_HEADER

#endif

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