DifferenceEngineTest.php

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<?php

class DifferenceEngineTest extends MediaWikiTestCase {

    protected $context;

    private static $revisions;

    protected function setUp() {
        parent::setUp();

        $title = $this->getTitle();

        $this->context = new RequestContext();
        $this->context->setTitle( $title );

        if ( !self::$revisions ) {
            self::$revisions = $this->doEdits();
        }
    }

    protected function getTitle() {
        $namespace = $this->getDefaultWikitextNS();
        return Title::newFromText( 'Kitten', $namespace );
    }

    protected function doEdits() {
        $title = $this->getTitle();
        $page = WikiPage::factory( $title );

        $strings = array( "it is a kitten", "two kittens", "three kittens", "four kittens" );
        $revisions = array();

        foreach ( $strings as $string ) {
            $content = ContentHandler::makeContent( $string, $title );
            $page->doEditContent( $content, 'edit page' );
            $revisions[] = $page->getLatest();
        }

        return $revisions;
    }

    public function testMapDiffPrevNext() {
        $cases = $this->getMapDiffPrevNextCases();

        foreach ( $cases as $case ) {
            list( $expected, $old, $new, $message ) = $case;

            $diffEngine = new DifferenceEngine( $this->context, $old, $new, 2, true, false );
            $diffMap = $diffEngine->mapDiffPrevNext( $old, $new );
            $this->assertEquals( $expected, $diffMap, $message );
        }
    }

    private function getMapDiffPrevNextCases() {
        $revs = self::$revisions;

        return array(
            array( array( $revs[1], $revs[2] ), $revs[2], 'prev', 'diff=prev' ),
            array( array( $revs[2], $revs[3] ), $revs[2], 'next', 'diff=next' ),
            array( array( $revs[1], $revs[3] ), $revs[1], $revs[3], 'diff=' . $revs[3] )
        );
    }

    public function testLoadRevisionData() {
        $cases = $this->getLoadRevisionDataCases();

        foreach ( $cases as $case ) {
            list( $expectedOld, $expectedNew, $old, $new, $message ) = $case;

            $diffEngine = new DifferenceEngine( $this->context, $old, $new, 2, true, false );
            $diffEngine->loadRevisionData();

            $this->assertEquals( $diffEngine->getOldid(), $expectedOld, $message );
            $this->assertEquals( $diffEngine->getNewid(), $expectedNew, $message );
        }
    }

    private function getLoadRevisionDataCases() {
        $revs = self::$revisions;

        return array(
            array( $revs[2], $revs[3], $revs[3], 'prev', 'diff=prev' ),
            array( $revs[2], $revs[3], $revs[2], 'next', 'diff=next' ),
            array( $revs[1], $revs[3], $revs[1], $revs[3], 'diff=' . $revs[3] ),
            array( $revs[1], $revs[3], $revs[1], 0, 'diff=0' )
        );
    }

    public function testGetOldid() {
        $revs = self::$revisions;

        $diffEngine = new DifferenceEngine( $this->context, $revs[1], $revs[2], 2, true, false );
        $this->assertEquals( $revs[1], $diffEngine->getOldid(), 'diff get old id' );
    }

    public function testGetNewid() {
        $revs = self::$revisions;

        $diffEngine = new DifferenceEngine( $this->context, $revs[1], $revs[2], 2, true, false );
        $this->assertEquals( $revs[2], $diffEngine->getNewid(), 'diff get new id' );
    }

}