ReadOnlyModeTest.php

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<?php
 
class ReadOnlyModeTest extends MediaWikiTestCase {
    public function provider() {
        $rawTests = [
            'None of anything' => [
                'confMessage' => null,
                'hasFileName' => false,
                'fileContents' => false,
                'lbMessage' => false,
                'expectedState' => false,
                'expectedMessage' => false,
                'expectedConfState' => false,
                'expectedConfMessage' => false
            ],
            'File missing' => [
                'confMessage' => null,
                'hasFileName' => true,
                'fileContents' => false,
                'lbMessage' => false,
                'expectedState' => false,
                'expectedMessage' => false,
                'expectedConfState' => false,
                'expectedConfMessage' => false
            ],
            'File empty' => [
                'confMessage' => null,
                'hasFileName' => true,
                'fileContents' => '',
                'lbMessage' => false,
                'expectedState' => false,
                'expectedMessage' => false,
                'expectedConfState' => false,
                'expectedConfMessage' => false
            ],
            'File has message' => [
                'confMessage' => null,
                'hasFileName' => true,
                'fileContents' => 'Message',
                'lbMessage' => false,
                'expectedState' => true,
                'expectedMessage' => 'Message',
                'expectedConfState' => true,
                'expectedConfMessage' => 'Message',
            ],
            'Conf has message' => [
                'confMessage' => 'Message',
                'hasFileName' => false,
                'fileContents' => false,
                'lbMessage' => false,
                'expectedState' => true,
                'expectedMessage' => 'Message',
                'expectedConfState' => true,
                'expectedConfMessage' => 'Message'
            ],
            "Conf=false means don't check the file" => [
                'confMessage' => false,
                'hasFileName' => true,
                'fileContents' => 'Message',
                'lbMessage' => false,
                'expectedState' => false,
                'expectedMessage' => false,
                'expectedConfState' => false,
                'expectedConfMessage' => false,
            ],
            'LB has message' => [
                'confMessage' => null,
                'hasFileName' => false,
                'fileContents' => false,
                'lbMessage' => 'Message',
                'expectedState' => true,
                'expectedMessage' => 'Message',
                'expectedConfState' => false,
                'expectedConfMessage' => false
            ],
            'All three have a message: conf wins' => [
                'confMessage' => 'conf',
                'hasFileName' => true,
                'fileContents' => 'file',
                'lbMessage' => 'lb',
                'expectedState' => true,
                'expectedMessage' => 'conf',
                'expectedConfState' => true,
                'expectedConfMessage' => 'conf'
            ]
        ];
        $cookedTests = [];
        foreach ( $rawTests as $desc => $test ) {
            $cookedTests[$desc] = [ $test ];
        }
        return $cookedTests;
    }
 
    private function createMode( $params, $makeLB ) {
        $config = new HashConfig( [
            'ReadOnly' => $params['confMessage'],
            'ReadOnlyFile' => $this->createFile( $params ),
        ] );
 
        $rom = new ConfiguredReadOnlyMode( $config );
 
        if ( $makeLB ) {
            $lb = $this->createLB( $params );
            $rom = new ReadOnlyMode( $rom, $lb );
        }
 
        return $rom;
    }
 
    private function createLB( $params ) {
        $lb = $this->getMockBuilder( \Wikimedia\Rdbms\LoadBalancer::class )
            ->disableOriginalConstructor()
            ->getMock();
        $lb->expects( $this->any() )->method( 'getReadOnlyReason' )
            ->willReturn( $params['lbMessage'] );
        return $lb;
    }
 
    private function createFile( $params ) {
        if ( $params['hasFileName'] ) {
            $fileName = $this->getNewTempFile();
 
            if ( $params['fileContents'] === false ) {
                unlink( $fileName );
            } else {
                file_put_contents( $fileName, $params['fileContents'] );
            }
        } else {
            $fileName = null;
        }
        return $fileName;
    }
 
    public function testWithLB( $params ) {
        $rom = $this->createMode( $params, true );
        $this->assertSame( $params['expectedMessage'], $rom->getReason() );
        $this->assertSame( $params['expectedState'], $rom->isReadOnly() );
    }
 
    public function testWithoutLB( $params ) {
        $cro = $this->createMode( $params, false );
        $this->assertSame( $params['expectedConfMessage'], $cro->getReason() );
        $this->assertSame( $params['expectedConfState'], $cro->isReadOnly() );
    }
 
    public function testSetReadOnlyReason() {
        $rom = $this->createMode(
            [
                'confMessage' => 'conf',
                'hasFileName' => false,
                'fileContents' => false,
                'lbMessage' => 'lb'
            ],
            true );
        $rom->setReason( 'override' );
        $this->assertSame( 'override', $rom->getReason() );
    }
 
    public function testClearCache() {
        $fileName = $this->getNewTempFile();
        unlink( $fileName );
        $config = new HashConfig( [
            'ReadOnly' => null,
            'ReadOnlyFile' => $fileName,
        ] );
        $cro = new ConfiguredReadOnlyMode( $config );
        $lb = $this->createLB( [ 'lbMessage' => false ] );
        $rom = new ReadOnlyMode( $cro, $lb );
 
        $this->assertSame( false, $rom->getReason(), 'initial' );
 
        file_put_contents( $fileName, 'file' );
        $this->assertSame( false, $rom->getReason(), 'stale' );
 
        $rom->clearCache();
        $this->assertSame( 'file', $rom->getReason(), 'fresh' );
    }
}