TextSlotDiffRendererTest.php

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<?php
 
use Wikimedia\Assert\ParameterTypeException;
 
class TextSlotDiffRendererTest extends MediaWikiTestCase {
 
    public function testGetDiff(
        Content $oldContent = null, Content $newContent = null, $expectedResult
    ) {
        if ( $expectedResult instanceof Exception ) {
            $this->setExpectedException( get_class( $expectedResult ), $expectedResult->getMessage() );
        }
 
        $slotDiffRenderer = $this->getTextSlotDiffRenderer();
        $diff = $slotDiffRenderer->getDiff( $oldContent, $newContent );
        if ( $expectedResult instanceof Exception ) {
            return;
        }
        $plainDiff = $this->getPlainDiff( $diff );
        $this->assertSame( $expectedResult, $plainDiff );
    }
 
    public function provideGetDiff() {
        $this->mergeMwGlobalArrayValue( 'wgContentHandlers', [
            'testing' => DummyContentHandlerForTesting::class,
            'testing-nontext' => DummyNonTextContentHandler::class,
        ] );
 
        return [
            'same text' => [
                $this->makeContent( "aaa\nbbb\nccc" ),
                $this->makeContent( "aaa\nbbb\nccc" ),
                "",
            ],
            'different text' => [
                $this->makeContent( "aaa\nbbb\nccc" ),
                $this->makeContent( "aaa\nxxx\nccc" ),
                " aaa aaa\n-bbb+xxx\n ccc ccc",
            ],
            'no right content' => [
                $this->makeContent( "aaa\nbbb\nccc" ),
                null,
                "-aaa+ \n-bbb \n-ccc ",
            ],
            'no left content' => [
                null,
                $this->makeContent( "aaa\nbbb\nccc" ),
                "- +aaa\n +bbb\n +ccc",
            ],
            'no content' => [
                null,
                null,
                new InvalidArgumentException( '$oldContent and $newContent cannot both be null' ),
            ],
            'non-text left content' => [
                $this->makeContent( '', 'testing-nontext' ),
                $this->makeContent( "aaa\nbbb\nccc" ),
                new ParameterTypeException( '$oldContent', 'TextContent|null' ),
            ],
            'non-text right content' => [
                $this->makeContent( "aaa\nbbb\nccc" ),
                $this->makeContent( '', 'testing-nontext' ),
                new ParameterTypeException( '$newContent', 'TextContent|null' ),
            ],
        ];
    }
 
    // no separate test for getTextDiff() as getDiff() is just a thin wrapper around it
 
    private function getTextSlotDiffRenderer() {
        $slotDiffRenderer = new TextSlotDiffRenderer();
        $slotDiffRenderer->setStatsdDataFactory( new NullStatsdDataFactory() );
        $slotDiffRenderer->setLanguage( Language::factory( 'en' ) );
        $slotDiffRenderer->setWikiDiff2MovedParagraphDetectionCutoff( 0 );
        $slotDiffRenderer->setEngine( TextSlotDiffRenderer::ENGINE_PHP );
        return $slotDiffRenderer;
    }
 
    private function getPlainDiff( $diff ) {
        $replacements = [
            html_entity_decode( '&nbsp;' ) => ' ',
            html_entity_decode( '&minus;' ) => '-',
        ];
        return str_replace( array_keys( $replacements ), array_values( $replacements ),
            trim( strip_tags( $diff ), "\n" ) );
    }
 
    private function makeContent( $str, $model = CONTENT_MODEL_TEXT ) {
        return ContentHandler::makeContent( $str, null, $model );
    }
 
}