GzDumpReaderTest::testRewind()   A
last analyzed

Complexity

Conditions 1
Paths 1

Size

Total Lines 8

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
dl 0
loc 8
rs 10
c 0
b 0
f 0
cc 1
nc 1
nop 0
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<?php
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declare( strict_types = 1 );
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namespace Wikibase\JsonDumpReader\Tests\Unit\Reader;
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use PHPUnit\Framework\TestCase;
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use Wikibase\JsonDumpReader\Reader\GzDumpReader;
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/**
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 * @covers \Wikibase\JsonDumpReader\Reader\GzDumpReader
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 *
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 * @licence GNU GPL v2+
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 * @author Jeroen De Dauw < [email protected] >
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 */
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class GzDumpReaderTest extends TestCase {
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	public function testGivenInvalidGzPath_exceptionIsThrown() {
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		$this->expectException( 'RuntimeException' );
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		$reader = new GzDumpReader( __DIR__ . '/../../data/does-not-exist.json.gz' );
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		$reader->nextJsonLine();
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	}
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	private function assertFindsEntity( GzDumpReader $reader, $expectedId ) {
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		$line = $reader->nextJsonLine();
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		$this->assertJson( $line );
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		$this->assertContains( $expectedId, $line );
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	}
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	public function testGivenGzFileWithNoEntities_nullIsReturned() {
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		$reader = new GzDumpReader( ( new \JsonDumpData() )->getEmptyGzDumpPath() );
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		$this->assertNull( $reader->nextJsonLine() );
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	}
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	public function testGivenGzFileWithFiveEntities_fiveEntityAreFound() {
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		$reader = new GzDumpReader( ( new \JsonDumpData() )->getFiveEntitiesGzDumpPath() );
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		$this->assertFindsEntity( $reader, 'Q1' );
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		$this->assertFindsEntity( $reader, 'Q8' );
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		$this->assertFindsEntity( $reader, 'P16' );
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		$this->assertFindsEntity( $reader, 'P19' );
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		$this->assertFindsEntity( $reader, 'P22' );
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		$this->assertNull( $reader->nextJsonLine() );
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	}
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	public function testRewind() {
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		$reader = new GzDumpReader( ( new \JsonDumpData() )->getFiveEntitiesGzDumpPath() );
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		$this->assertFindsEntity( $reader, 'Q1' );
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		$this->assertFindsEntity( $reader, 'Q8' );
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		$reader->rewind();
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		$this->assertFindsEntity( $reader, 'Q1' );
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	}
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	public function testResumeFromPosition() {
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		$reader = new GzDumpReader( ( new \JsonDumpData() )->getFiveEntitiesGzDumpPath() );
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		$this->assertFindsEntity( $reader, 'Q1' );
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		$this->assertFindsEntity( $reader, 'Q8' );
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		$position = $reader->getPosition();
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		unset( $reader );
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		$newReader = new GzDumpReader( ( new \JsonDumpData() )->getFiveEntitiesGzDumpPath() );
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		$newReader->seekToPosition( $position );
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		$this->assertFindsEntity( $newReader, 'P16' );
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	}
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}