HooksTest.php

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<?php

class HooksTest extends MediaWikiTestCase {

    function setUp() {
        global $wgHooks;
        parent::setUp();
        Hooks::clear( 'MediaWikiHooksTest001' );
        unset( $wgHooks['MediaWikiHooksTest001'] );
    }

    public static function provideHooks() {
        $i = new NothingClass();

        return array(
            array(
                'Object and method',
                array( $i, 'someNonStatic' ),
                'changed-nonstatic',
                'changed-nonstatic'
            ),
            array( 'Object and no method', array( $i ), 'changed-onevent', 'original' ),
            array(
                'Object and method with data',
                array( $i, 'someNonStaticWithData', 'data' ),
                'data',
                'original'
            ),
            array( 'Object and static method', array( $i, 'someStatic' ), 'changed-static', 'original' ),
            array(
                'Class::method static call',
                array( 'NothingClass::someStatic' ),
                'changed-static',
                'original'
            ),
            array( 'Global function', array( 'NothingFunction' ), 'changed-func', 'original' ),
            array( 'Global function with data', array( 'NothingFunctionData', 'data' ), 'data', 'original' ),
            array( 'Closure', array( function ( &$foo, $bar ) {
                $foo = 'changed-closure';

                return true;
            } ), 'changed-closure', 'original' ),
            array( 'Closure with data', array( function ( $data, &$foo, $bar ) {
                $foo = $data;

                return true;
            }, 'data' ), 'data', 'original' )
        );
    }

    public function testOldStyleHooks( $msg, array $hook, $expectedFoo, $expectedBar ) {
        global $wgHooks;
        $foo = $bar = 'original';

        $wgHooks['MediaWikiHooksTest001'][] = $hook;
        wfRunHooks( 'MediaWikiHooksTest001', array( &$foo, &$bar ) );

        $this->assertSame( $expectedFoo, $foo, $msg );
        $this->assertSame( $expectedBar, $bar, $msg );
    }

    public function testNewStyleHooks( $msg, $hook, $expectedFoo, $expectedBar ) {
        $foo = $bar = 'original';

        Hooks::register( 'MediaWikiHooksTest001', $hook );
        Hooks::run( 'MediaWikiHooksTest001', array( &$foo, &$bar ) );

        $this->assertSame( $expectedFoo, $foo, $msg );
        $this->assertSame( $expectedBar, $bar, $msg );
    }

    public function testNewStyleHookInteraction() {
        global $wgHooks;

        $a = new NothingClass();
        $b = new NothingClass();

        $wgHooks['MediaWikiHooksTest001'][] = $a;
        $this->assertTrue(
            Hooks::isRegistered( 'MediaWikiHooksTest001' ),
            'Hook registered via $wgHooks should be noticed by Hooks::isRegistered'
        );

        Hooks::register( 'MediaWikiHooksTest001', $b );
        $this->assertEquals(
            2,
            count( Hooks::getHandlers( 'MediaWikiHooksTest001' ) ),
            'Hooks::getHandlers() should return hooks registered via wgHooks as well as Hooks::register'
        );

        $foo = 'quux';
        $bar = 'qaax';

        Hooks::run( 'MediaWikiHooksTest001', array( &$foo, &$bar ) );
        $this->assertEquals(
            1,
            $a->calls,
            'Hooks::run() should run hooks registered via wgHooks as well as Hooks::register'
        );
        $this->assertEquals(
            1,
            $b->calls,
            'Hooks::run() should run hooks registered via wgHooks as well as Hooks::register'
        );
    }

    public function testUncallableFunction() {
        Hooks::register( 'MediaWikiHooksTest001', 'ThisFunctionDoesntExist' );
        Hooks::run( 'MediaWikiHooksTest001', array() );
    }

    public function testFalseReturn() {
        Hooks::register( 'MediaWikiHooksTest001', function ( &$foo ) {
            return false;
        } );
        Hooks::register( 'MediaWikiHooksTest001', function ( &$foo ) {
            $foo = 'test';

            return true;
        } );
        $foo = 'original';
        Hooks::run( 'MediaWikiHooksTest001', array( &$foo ) );
        $this->assertSame( 'original', $foo, 'Hooks continued processing after a false return.' );
    }

    public function testFatalError() {
        Hooks::register( 'MediaWikiHooksTest001', function () {
            return 'test';
        } );
        Hooks::run( 'MediaWikiHooksTest001', array() );
    }
}

function NothingFunction( &$foo, &$bar ) {
    $foo = 'changed-func';

    return true;
}

function NothingFunctionData( $data, &$foo, &$bar ) {
    $foo = $data;

    return true;
}

class NothingClass {
    public $calls = 0;

    public static function someStatic( &$foo, &$bar ) {
        $foo = 'changed-static';

        return true;
    }

    public function someNonStatic( &$foo, &$bar ) {
        $this->calls++;
        $foo = 'changed-nonstatic';
        $bar = 'changed-nonstatic';

        return true;
    }

    public function onMediaWikiHooksTest001( &$foo, &$bar ) {
        $this->calls++;
        $foo = 'changed-onevent';

        return true;
    }

    public function someNonStaticWithData( $data, &$foo, &$bar ) {
        $this->calls++;
        $foo = $data;

        return true;
    }
}