ArrayDiffFormatterTest.php

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<?php

class ArrayDiffFormatterTest extends MediaWikiTestCase {

    public function testFormat( $input, $expectedOutput ) {
        $instance = new ArrayDiffFormatter();
        $output = $instance->format( $input );
        $this->assertEquals( $expectedOutput, $output );
    }

    private function getMockDiff( $edits ) {
        $diff = $this->getMockBuilder( 'Diff' )
            ->disableOriginalConstructor()
            ->getMock();
        $diff->expects( $this->any() )
            ->method( 'getEdits' )
            ->will( $this->returnValue( $edits ) );
        return $diff;
    }

    private function getMockDiffOp( $type = null, $orig = array(), $closing = array() ) {
        $diffOp = $this->getMockBuilder( 'DiffOp' )
            ->disableOriginalConstructor()
            ->getMock();
        $diffOp->expects( $this->any() )
            ->method( 'getType' )
            ->will( $this->returnValue( $type ) );
        $diffOp->expects( $this->any() )
            ->method( 'getOrig' )
            ->will( $this->returnValue( $orig ) );
        if ( $type === 'change' ) {
            $diffOp->expects( $this->any() )
                ->method( 'getClosing' )
                ->with( $this->isType( 'integer' ) )
                ->will( $this->returnCallback( function () {
                    return 'mockLine';
                } ) );
        } else {
            $diffOp->expects( $this->any() )
                ->method( 'getClosing' )
                ->will( $this->returnValue( $closing ) );
        }
        return $diffOp;
    }

    public function provideTestFormat() {
        $emptyArrayTestCases = array(
            $this->getMockDiff( array() ),
            $this->getMockDiff( array( $this->getMockDiffOp( 'add' ) ) ),
            $this->getMockDiff( array( $this->getMockDiffOp( 'delete' ) ) ),
            $this->getMockDiff( array( $this->getMockDiffOp( 'change' ) ) ),
            $this->getMockDiff( array( $this->getMockDiffOp( 'copy' ) ) ),
            $this->getMockDiff( array( $this->getMockDiffOp( 'FOOBARBAZ' ) ) ),
            $this->getMockDiff( array( $this->getMockDiffOp( 'add', 'line' ) ) ),
            $this->getMockDiff( array( $this->getMockDiffOp( 'delete', array(), array( 'line' ) ) ) ),
            $this->getMockDiff( array( $this->getMockDiffOp( 'copy', array(), array( 'line' ) ) ) ),
        );

        $otherTestCases = array();
        $otherTestCases[] = array(
            $this->getMockDiff( array( $this->getMockDiffOp( 'add', array( ), array( 'a1' ) ) ) ),
            array( array( 'action' => 'add', 'new' => 'a1', 'newline' => 1 ) ),
        );
        $otherTestCases[] = array(
            $this->getMockDiff( array( $this->getMockDiffOp( 'add', array( ), array( 'a1', 'a2' ) ) ) ),
            array(
                array( 'action' => 'add', 'new' => 'a1', 'newline' => 1 ),
                array( 'action' => 'add', 'new' => 'a2', 'newline' => 2 ),
            ),
        );
        $otherTestCases[] = array(
            $this->getMockDiff( array( $this->getMockDiffOp( 'delete', array( 'd1' ) ) ) ),
            array( array( 'action' => 'delete', 'old' => 'd1', 'oldline' => 1 ) ),
        );
        $otherTestCases[] = array(
            $this->getMockDiff( array( $this->getMockDiffOp( 'delete', array( 'd1', 'd2' ) ) ) ),
            array(
                array( 'action' => 'delete', 'old' => 'd1', 'oldline' => 1 ),
                array( 'action' => 'delete', 'old' => 'd2', 'oldline' => 2 ),
            ),
        );
        $otherTestCases[] = array(
            $this->getMockDiff( array( $this->getMockDiffOp( 'change', array( 'd1' ), array( 'a1' ) ) ) ),
            array( array(
                'action' => 'change',
                'old' => 'd1',
                'new' => 'mockLine',
                'newline' => 1, 'oldline' => 1
            ) ),
        );
        $otherTestCases[] = array(
            $this->getMockDiff( array( $this->getMockDiffOp(
                'change',
                array( 'd1', 'd2' ),
                array( 'a1', 'a2' )
            ) ) ),
            array(
                array(
                    'action' => 'change',
                    'old' => 'd1',
                    'new' => 'mockLine',
                    'newline' => 1, 'oldline' => 1
                ),
                array(
                    'action' => 'change',
                    'old' => 'd2',
                    'new' => 'mockLine',
                    'newline' => 2, 'oldline' => 2
                ),
            ),
        );

        $testCases = array();
        foreach ( $emptyArrayTestCases as $testCase ) {
            $testCases[] = array( $testCase, array() );
        }
        foreach ( $otherTestCases as $testCase ) {
            $testCases[] = array( $testCase[0], $testCase[1] );
        }
        return $testCases;
    }

}