Wikibase\DataModel\Services\Tests\EntityId\InMemoryEntityIdPagerTest

Complexity

Total Complexity

6

Size/Duplication

Total Lines	108
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	3

Importance

Changes

0

6 Methods

Rating	Name	Duplication	Size	Complexity
A	testReturnsEmptyArrayWhenThereAreNoIds()	0	6	1
A	testReturnsTheFirstIdsUpToLimit()	0	17	1
A	testReturnsLessItemsIfThereAreFew()	0	14	1
A	testReturnsNextBatch()	0	19	1
A	testCanResumeFromPosition()	0	28	1
A	testCanAddIds()	0	15	1

<?php

namespace Wikibase\DataModel\Services\Tests\EntityId;

use PHPUnit\Framework\TestCase;
use Wikibase\DataModel\Entity\ItemId;
use Wikibase\DataModel\Services\EntityId\InMemoryEntityIdPager;

/**
 * @covers \Wikibase\DataModel\Services\EntityId\InMemoryEntityIdPager
 *
 * @license GPL-2.0-or-later
 */
class InMemoryEntityIdPagerTest extends TestCase {

	public function testReturnsEmptyArrayWhenThereAreNoIds() {
		$this->assertSame(
			[],
			( new InMemoryEntityIdPager() )->fetchIds( 10 )
		);
	}

	public function testReturnsTheFirstIdsUpToLimit() {
		$pager = new InMemoryEntityIdPager(
			new ItemId( 'Q1' ),
			new ItemId( 'Q2' ),
			new ItemId( 'Q3' ),
			new ItemId( 'Q4' ),
			new ItemId( 'Q5' )
		);

		$this->assertEquals(
			[
				new ItemId( 'Q1' ),
				new ItemId( 'Q2' ),
			],
			$pager->fetchIds( 2 )
		);
	}

	public function testReturnsLessItemsIfThereAreFew() {
		$pager = new InMemoryEntityIdPager(
			new ItemId( 'Q1' ),
			new ItemId( 'Q2' )
		);

		$this->assertEquals(
			[
				new ItemId( 'Q1' ),
				new ItemId( 'Q2' ),
			],
			$pager->fetchIds( 5 )
		);
	}

	public function testReturnsNextBatch() {
		$pager = new InMemoryEntityIdPager(
			new ItemId( 'Q1' ),
			new ItemId( 'Q2' ),
			new ItemId( 'Q3' ),
			new ItemId( 'Q4' ),
			new ItemId( 'Q5' )
		);

		$pager->fetchIds( 2 );

		$this->assertEquals(
			[
				new ItemId( 'Q3' ),
				new ItemId( 'Q4' ),
			],
			$pager->fetchIds( 2 )
		);
	}

	public function testCanResumeFromPosition() {
		$firstPager = new InMemoryEntityIdPager(
			new ItemId( 'Q1' ),
			new ItemId( 'Q2' ),
			new ItemId( 'Q3' ),
			new ItemId( 'Q4' ),
			new ItemId( 'Q5' )
		);

		$secondPager = new InMemoryEntityIdPager(
			new ItemId( 'Q1' ),
			new ItemId( 'Q2' ),
			new ItemId( 'Q3' ),
			new ItemId( 'Q4' ),
			new ItemId( 'Q5' )
		);

		$firstPager->fetchIds( 2 );
		$secondPager->setPosition( $firstPager->getPosition() );

		$this->assertEquals(
			[
				new ItemId( 'Q3' ),
				new ItemId( 'Q4' ),
			],
			$secondPager->fetchIds( 2 )
		);
	}

	public function testCanAddIds() {
		$pager = new InMemoryEntityIdPager(
			new ItemId( 'Q1' )
		);

		$pager->addEntityId( new ItemId( 'Q2' ) );

		$this->assertEquals(
			[
				new ItemId( 'Q1' ),
				new ItemId( 'Q2' ),
			],
			$pager->fetchIds( 2 )
		);
	}

}