1 files changed, 148 insertions, 0 deletions
diff --git a/www/wiki/tests/phpunit/includes/diff/DifferenceEngineTest.php b/www/wiki/tests/phpunit/includes/diff/DifferenceEngineTest.php
new file mode 100644
index 00000000..57aeb200
--- /dev/null
+++ b/www/wiki/tests/phpunit/includes/diff/DifferenceEngineTest.php
@@ -0,0 +1,148 @@
+<?php
+
+use Wikimedia\TestingAccessWrapper;
+
+/**
+ * @covers DifferenceEngine
+ *
+ * @todo tests for the rest of DifferenceEngine!
+ *
+ * @group Database
+ * @group Diff
+ *
+ * @author Katie Filbert < aude.wiki@gmail.com >
+ */
+class DifferenceEngineTest extends MediaWikiTestCase {
+
+	protected $context;
+
+	private static $revisions;
+
+	protected function setUp() {
+		parent::setUp();
+
+		$title = $this->getTitle();
+
+		$this->context = new RequestContext();
+		$this->context->setTitle( $title );
+
+		if ( !self::$revisions ) {
+			self::$revisions = $this->doEdits();
+		}
+	}
+
+	/**
+	 * @return Title
+	 */
+	protected function getTitle() {
+		$namespace = $this->getDefaultWikitextNS();
+		return Title::newFromText( 'Kitten', $namespace );
+	}
+
+	/**
+	 * @return int[] Revision ids
+	 */
+	protected function doEdits() {
+		$title = $this->getTitle();
+		$page = WikiPage::factory( $title );
+
+		$strings = [ "it is a kitten", "two kittens", "three kittens", "four kittens" ];
+		$revisions = [];
+
+		foreach ( $strings as $string ) {
+			$content = ContentHandler::makeContent( $string, $title );
+			$page->doEditContent( $content, 'edit page' );
+			$revisions[] = $page->getLatest();
+		}
+
+		return $revisions;
+	}
+
+	public function testMapDiffPrevNext() {
+		$cases = $this->getMapDiffPrevNextCases();
+
+		foreach ( $cases as $case ) {
+			list( $expected, $old, $new, $message ) = $case;
+
+			$diffEngine = new DifferenceEngine( $this->context, $old, $new, 2, true, false );
+			$diffMap = $diffEngine->mapDiffPrevNext( $old, $new );
+			$this->assertEquals( $expected, $diffMap, $message );
+		}
+	}
+
+	private function getMapDiffPrevNextCases() {
+		$revs = self::$revisions;
+
+		return [
+			[ [ $revs[1], $revs[2] ], $revs[2], 'prev', 'diff=prev' ],
+			[ [ $revs[2], $revs[3] ], $revs[2], 'next', 'diff=next' ],
+			[ [ $revs[1], $revs[3] ], $revs[1], $revs[3], 'diff=' . $revs[3] ]
+		];
+	}
+
+	public function testLoadRevisionData() {
+		$cases = $this->getLoadRevisionDataCases();
+
+		foreach ( $cases as $case ) {
+			list( $expectedOld, $expectedNew, $old, $new, $message ) = $case;
+
+			$diffEngine = new DifferenceEngine( $this->context, $old, $new, 2, true, false );
+			$diffEngine->loadRevisionData();
+
+			$this->assertEquals( $diffEngine->getOldid(), $expectedOld, $message );
+			$this->assertEquals( $diffEngine->getNewid(), $expectedNew, $message );
+		}
+	}
+
+	private function getLoadRevisionDataCases() {
+		$revs = self::$revisions;
+
+		return [
+			[ $revs[2], $revs[3], $revs[3], 'prev', 'diff=prev' ],
+			[ $revs[2], $revs[3], $revs[2], 'next', 'diff=next' ],
+			[ $revs[1], $revs[3], $revs[1], $revs[3], 'diff=' . $revs[3] ],
+			[ $revs[1], $revs[3], $revs[1], 0, 'diff=0' ]
+		];
+	}
+
+	public function testGetOldid() {
+		$revs = self::$revisions;
+
+		$diffEngine = new DifferenceEngine( $this->context, $revs[1], $revs[2], 2, true, false );
+		$this->assertEquals( $revs[1], $diffEngine->getOldid(), 'diff get old id' );
+	}
+
+	public function testGetNewid() {
+		$revs = self::$revisions;
+
+		$diffEngine = new DifferenceEngine( $this->context, $revs[1], $revs[2], 2, true, false );
+		$this->assertEquals( $revs[2], $diffEngine->getNewid(), 'diff get new id' );
+	}
+
+	public function provideLocaliseTitleTooltipsTestData() {
+		return [
+			'moved paragraph left shoud get new location title' => [
+				'<a class="mw-diff-movedpara-left">⚫</a>',
+				'<a class="mw-diff-movedpara-left" title="(diff-paragraph-moved-tonew)">⚫</a>',
+			],
+			'moved paragraph right shoud get old location title' => [
+				'<a class="mw-diff-movedpara-right">⚫</a>',
+				'<a class="mw-diff-movedpara-right" title="(diff-paragraph-moved-toold)">⚫</a>',
+			],
+			'nothing changed when key not hit' => [
+				'<a class="mw-diff-movedpara-rightis">⚫</a>',
+				'<a class="mw-diff-movedpara-rightis">⚫</a>',
+			],
+		];
+	}
+
+	/**
+	 * @dataProvider provideLocaliseTitleTooltipsTestData
+	 */
+	public function testAddLocalisedTitleTooltips( $input, $expected ) {
+		$this->setContentLang( 'qqx' );
+		$diffEngine = TestingAccessWrapper::newFromObject( new DifferenceEngine() );
+		$this->assertEquals( $expected, $diffEngine->addLocalisedTitleTooltips( $input ) );
+	}
+
+}