More complete, more straightforward JobQueueMemoryTest

[mediawiki.git] / tests / phpunit / maintenance / fetchTextTest.php

<?php

require_once __DIR__ . "/../../../maintenance/fetchText.php";

/**
 * Mock for the input/output of FetchText
 *
 * FetchText internally tries to access stdin and stdout. We mock those aspects
 * for testing.
 */
class SemiMockedFetchText extends FetchText {

        /**
         * @var string|null Text to pass as stdin
         */
        private $mockStdinText = null;

        /**
         * @var bool Whether or not a text for stdin has been provided
         */
        private $mockSetUp = false;

        /**
         * @var array Invocation counters for the mocked aspects
         */
        private $mockInvocations = array( 'getStdin' => 0 );

        /**
         * Data for the fake stdin
         *
         * @param string $stdin The string to be used instead of stdin
         */
        function mockStdin( $stdin ) {
                $this->mockStdinText = $stdin;
                $this->mockSetUp = true;
        }

        /**
         * Gets invocation counters for mocked methods.
         *
         * @return array An array, whose keys are function names. The corresponding values
         * denote the number of times the function has been invoked.
         */
        function mockGetInvocations() {
                return $this->mockInvocations;
        }

        // -----------------------------------------------------------------
        // Mocked functions from FetchText follow.

        function getStdin( $len = null ) {
                $this->mockInvocations['getStdin']++;
                if ( $len !== null ) {
                        throw new PHPUnit_Framework_ExpectationFailedException(
                                "Tried to get stdin with non null parameter" );
                }

                if ( !$this->mockSetUp ) {
                        throw new PHPUnit_Framework_ExpectationFailedException(
                                "Tried to get stdin before setting up rerouting" );
                }

                return fopen( 'data://text/plain,' . $this->mockStdinText, 'r' );
        }
}

/**
 * TestCase for FetchText
 *
 * @group Database
 * @group Dump
 * @covers FetchText
 */
class FetchTextTest extends MediaWikiTestCase {

        // We add 5 Revisions for this test. Their corresponding text id's
        // are stored in the following 5 variables.
        private $textId1;
        private $textId2;
        private $textId3;
        private $textId4;
        private $textId5;

        /**
         * @var Exception|null As the current MediaWikiTestCase::run is not
         * robust enough to recover from thrown exceptions directly, we cannot
         * throw frow within addDBData, although it would be appropriate. Hence,
         * we catch the exception and store it until we are in setUp and may
         * finally rethrow the exception without crashing the test suite.
         */
        private $exceptionFromAddDBData;

        /**
         * @var FetchText The (mocked) FetchText that is to test
         */
        private $fetchText;

        /**
         * Adds a revision to a page, while returning the resuting text's id
         *
         * @param WikiPage $page The page to add the revision to
         * @param string $text The revisions text
         * @param string $summary The revisions summare
         * @return int
         * @throws MWException
         */
        private function addRevision( $page, $text, $summary ) {
                $status = $page->doEditContent(
                        ContentHandler::makeContent( $text, $page->getTitle() ),
                        $summary
                );

                if ( $status->isGood() ) {
                        $value = $status->getValue();
                        $revision = $value['revision'];
                        $id = $revision->getTextId();

                        if ( $id > 0 ) {
                                return $id;
                        }
                }

                throw new MWException( "Could not determine text id" );
        }

        function addDBData() {
                $this->tablesUsed[] = 'page';
                $this->tablesUsed[] = 'revision';
                $this->tablesUsed[] = 'text';

                $wikitextNamespace = $this->getDefaultWikitextNS();

                try {
                        $title = Title::newFromText( 'FetchTextTestPage1', $wikitextNamespace );
                        $page = WikiPage::factory( $title );
                        $this->textId1 = $this->addRevision(
                                $page,
                                "FetchTextTestPage1Text1",
                                "FetchTextTestPage1Summary1"
                        );

                        $title = Title::newFromText( 'FetchTextTestPage2', $wikitextNamespace );
                        $page = WikiPage::factory( $title );
                        $this->textId2 = $this->addRevision(
                                $page,
                                "FetchTextTestPage2Text1",
                                "FetchTextTestPage2Summary1"
                        );
                        $this->textId3 = $this->addRevision(
                                $page,
                                "FetchTextTestPage2Text2",
                                "FetchTextTestPage2Summary2"
                        );
                        $this->textId4 = $this->addRevision(
                                $page,
                                "FetchTextTestPage2Text3",
                                "FetchTextTestPage2Summary3"
                        );
                        $this->textId5 = $this->addRevision(
                                $page,
                                "FetchTextTestPage2Text4 some additional Text  ",
                                "FetchTextTestPage2Summary4 extra "
                        );
                } catch ( Exception $e ) {
                        // We'd love to pass $e directly. However, ... see
                        // documentation of exceptionFromAddDBData
                        $this->exceptionFromAddDBData = $e;
                }
        }

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

                // Check if any Exception is stored for rethrowing from addDBData
                if ( $this->exceptionFromAddDBData !== null ) {
                        throw $this->exceptionFromAddDBData;
                }

                $this->fetchText = new SemiMockedFetchText();
        }

        /**
         * Helper to relate FetchText's input and output
         * @param string $input
         * @param string $expectedOutput
         */
        private function assertFilter( $input, $expectedOutput ) {
                $this->fetchText->mockStdin( $input );
                $this->fetchText->execute();
                $invocations = $this->fetchText->mockGetInvocations();
                $this->assertEquals( 1, $invocations['getStdin'],
                        "getStdin invocation counter" );
                $this->expectOutputString( $expectedOutput );
        }

        // Instead of the following functions, a data provider would be great.
        // However, as data providers are evaluated /before/ addDBData, a data
        // provider would not know the required ids.

        function testExistingSimple() {
                $this->assertFilter( $this->textId2,
                        $this->textId2 . "\n23\nFetchTextTestPage2Text1" );
        }

        function testExistingSimpleWithNewline() {
                $this->assertFilter( $this->textId2 . "\n",
                        $this->textId2 . "\n23\nFetchTextTestPage2Text1" );
        }

        function testExistingSeveral() {
                $this->assertFilter( "$this->textId1\n$this->textId5\n"
                                . "$this->textId3\n$this->textId3",
                        implode( "", array(
                                $this->textId1 . "\n23\nFetchTextTestPage1Text1",
                                $this->textId5 . "\n44\nFetchTextTestPage2Text4 "
                                        . "some additional Text",
                                $this->textId3 . "\n23\nFetchTextTestPage2Text2",
                                $this->textId3 . "\n23\nFetchTextTestPage2Text2"
                        ) ) );
        }

        function testEmpty() {
                $this->assertFilter( "", null );
        }

        function testNonExisting() {
                $this->assertFilter( $this->textId5 + 10, ( $this->textId5 + 10 ) . "\n-1\n" );
        }

        function testNegativeInteger() {
                $this->assertFilter( "-42", "-42\n-1\n" );
        }

        function testFloatingPointNumberExisting() {
                // float -> int -> revision
                $this->assertFilter( $this->textId3 + 0.14159,
                        $this->textId3 . "\n23\nFetchTextTestPage2Text2" );
        }

        function testFloatingPointNumberNonExisting() {
                $this->assertFilter( $this->textId5 + 3.14159,
                        ( $this->textId5 + 3 ) . "\n-1\n" );
        }

        function testCharacters() {
                $this->assertFilter( "abc", "0\n-1\n" );
        }

        function testMix() {
                $this->assertFilter( "ab\n" . $this->textId4 . ".5cd\n\nefg\n" . $this->textId2
                                . "\n" . $this->textId3,
                        implode( "", array(
                                "0\n-1\n",
                                $this->textId4 . "\n23\nFetchTextTestPage2Text3",
                                "0\n-1\n",
                                "0\n-1\n",
                                $this->textId2 . "\n23\nFetchTextTestPage2Text1",
                                $this->textId3 . "\n23\nFetchTextTestPage2Text2"
                        ) ) );
        }
}