1 files changed, 104 insertions, 0 deletions
diff --git a/tests/phpunit/includes/GlobalFunctions/wfThumbIsStandardTest.php b/tests/phpunit/includes/GlobalFunctions/wfThumbIsStandardTest.php
new file mode 100644
index 00000000..448250a6
--- /dev/null
+++ b/tests/phpunit/includes/GlobalFunctions/wfThumbIsStandardTest.php
@@ -0,0 +1,104 @@
+<?php
+
+/**
+ * @group GlobalFunctions
+ * @covers ::wfThumbIsStandard
+ */
+class WfThumbIsStandardTest extends MediaWikiTestCase {
+
+	protected function setUp() {
+		parent::setUp();
+
+		$this->setMwGlobals( array(
+			'wgThumbLimits' => array(
+				100,
+				401
+			),
+			'wgImageLimits' => array(
+				array( 300, 225 ),
+				array( 800, 600 ),
+			),
+			'wgMediaHandlers' => array(
+				'unknown/unknown' => 'MockBitmapHandler',
+			),
+		) );
+	}
+
+	public static function provideThumbParams() {
+		return array(
+			// Thumb limits
+			array(
+				'Standard thumb width',
+				true,
+				array( 'width' => 100 ),
+			),
+			array(
+				'Standard thumb width',
+				true,
+				array( 'width' => 401 ),
+			),
+			// wfThumbIsStandard should match Linker::processResponsiveImages
+			// in its rounding behaviour.
+			array(
+				'Standard thumb width (HiDPI 1.5x) - incorrect rounding',
+				false,
+				array( 'width' => 601 ),
+			),
+			array(
+				'Standard thumb width (HiDPI 1.5x)',
+				true,
+				array( 'width' => 602 ),
+			),
+			array(
+				'Standard thumb width (HiDPI 2x)',
+				true,
+				array( 'width' => 802 ),
+			),
+			array(
+				'Non-standard thumb width',
+				false,
+				array( 'width' => 300 ),
+			),
+			// Image limits
+			// Note: Image limits are measured as pairs. Individual values
+			// may be non-standard based on the aspect ratio.
+			array(
+				'Standard image width/height pair',
+				true,
+				array( 'width' => 250, 'height' => 225 ),
+			),
+			array(
+				'Standard image width/height pair',
+				true,
+				array( 'width' => 667, 'height' => 600 ),
+			),
+			array(
+				'Standard image width where image does not fit aspect ratio',
+				false,
+				array( 'width' => 300 ),
+			),
+			array(
+				'Implicit width from image width/height pair aspect ratio fit',
+				true,
+				// 2000x1800 fit inside 300x225 makes w=250
+				array( 'width' => 250 ),
+			),
+			array(
+				'Height-only is always non-standard',
+				false,
+				array( 'height' => 225 ),
+			),
+		);
+	}
+
+	/**
+	 * @dataProvider provideThumbParams
+	 */
+	public function testIsStandard( $message, $expected, $params ) {
+		$this->assertSame(
+			$expected,
+			wfThumbIsStandard( new FakeDimensionFile( array( 2000, 1800 ) ), $params ),
+			$message
+		);
+	}
+}