116 lines
4.0 KiB
PHP
116 lines
4.0 KiB
PHP
<?php
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/**
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* Test the database access and core functionality of MathRenderer.
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*
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* @group Math
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* @group Database //Used by needsDB
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*/
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class MathDatabaseTest extends MediaWikiTestCase {
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/**
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* @var MathRenderer
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*/
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private $renderer;
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const SOME_TEX = "a+b";
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const SOME_HTML = "a<sub>b</sub> and so on";
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const SOME_MATHML = "iℏ∂_tΨ=H^Ψ<mrow><\ci>";
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const SOME_CONSERVATIVENESS = 2;
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const SOME_OUTPUTHASH = 'C65c884f742c8591808a121a828bc09f8<';
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/**
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* creates a new database connection and a new math renderer
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* TODO: Check if there is a way to get database access without creating
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* the connection to the database explicitly
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* function addDBData() {
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* $this->tablesUsed[] = 'math';
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* }
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* was not sufficient.
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*/
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protected function setup() {
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parent::setUp();
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// TODO: figure out why this is necessary
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$this->db = wfGetDB( DB_MASTER );
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// Create a new instance of MathSource
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$this->renderer = new MathTexvc( self::SOME_TEX );
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$this->tablesUsed[] = 'math';
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}
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/**
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* Checks the tex and hash functions
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* @covers MathRenderer::getInputHash()
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*/
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public function testInputHash() {
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$expectedhash = $this->db->encodeBlob( pack( "H32", md5( self::SOME_TEX ) ) );
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$this->assertEquals( $expectedhash, $this->renderer->getInputHash() );
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}
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/**
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* Helper function to set the current state of the sample renderer instance to the test values
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*/
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public function setValues() {
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// set some values
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$this->renderer->setTex( self::SOME_TEX );
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$this->renderer->setMathml( self::SOME_MATHML );
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$this->renderer->setHtml( self::SOME_HTML );
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$this->renderer->setOutputHash( self::SOME_OUTPUTHASH );
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}
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/**
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* Checks database access. Writes an entry and reads it back.
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* @covers MathRenderer::writeDatabaseEntry()
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* @covers MathRenderer::readDatabaseEntry()
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*/
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public function testDBBasics() {
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$this->setValues();
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$this->renderer->writeToDatabase( $this->db );
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$renderer2 = new MathTexvc( self::SOME_TEX );
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$this->assertTrue( $renderer2->readFromDatabase(), 'Reading from database failed' );
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// comparing the class object does now work due to null values etc.
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$this->assertEquals( $this->renderer->getTex(), $renderer2->getTex(), "test if tex is the same" );
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$this->assertEquals( $this->renderer->getMathml(), $renderer2->getMathml(), "Check MathML encoding" );
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$this->assertEquals( $this->renderer->getHtml(), $renderer2->getHtml(), 'test if HTML is the same' );
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}
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/**
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* Checks the creation of the math table.
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* @covers MathHooks::onLoadExtensionSchemaUpdates
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*/
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public function testCreateTable() {
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$this->setMwGlobals( 'wgMathValidModes', array( 'png' ) );
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$this->db->dropTable( "math", __METHOD__ );
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$dbu = DatabaseUpdater::newForDB( $this->db );
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$dbu->doUpdates( array( "extensions" ) );
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$this->expectOutputRegex( '/(.*)Creating math table(.*)/' );
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$this->setValues();
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$this->renderer->writeToDatabase();
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$res = $this->db->select( "math", "*" );
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$row = $res->fetchRow();
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$this->assertEquals( 10, sizeof( $row ) );
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}
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/*
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* This test checks if no additional write operation
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* is performed, if the entry already existed in the database.
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*/
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public function testNoWrite() {
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$this->setValues();
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$inputHash = $this->renderer->getInputHash();
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$this->assertTrue( $this->renderer->isChanged() );
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$this->assertTrue( $this->renderer->writeCache(), "Write new entry" );
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$res = $this->db->selectField( "math", "math_inputhash",
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array( "math_inputhash" => $inputHash ) );
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$this->assertTrue( $res !== false, "Check database entry" );
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$this->assertTrue( $this->renderer->readFromDatabase(), "Read entry from database" );
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$this->assertFalse( $this->renderer->isChanged() );
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// modify the database entry manually
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$this->db->delete( "math", array( "math_inputhash" => $inputHash ) );
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// the renderer should not be aware of the modification and should not recreate the entry
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$this->assertFalse( $this->renderer->writeCache() );
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// as a result no entry can be found in the database.
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$this->assertFalse( $this->renderer->readFromDatabase() );
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}
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}
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