1 files changed, 31 insertions, 0 deletions
diff --git a/tests/phpunit/includes/LocalisationCacheTest.php b/tests/phpunit/includes/LocalisationCacheTest.php
new file mode 100644
index 00000000..356db87c
--- /dev/null
+++ b/tests/phpunit/includes/LocalisationCacheTest.php
@@ -0,0 +1,31 @@
+<?php
+
+class LocalisationCacheTest extends MediaWikiTestCase {
+	public function testPuralRulesFallback() {
+		$cache = Language::getLocalisationCache();
+
+		$this->assertEquals(
+			$cache->getItem( 'ru', 'pluralRules' ),
+			$cache->getItem( 'os', 'pluralRules' ),
+			'os plural rules (undefined) fallback to ru (defined)'
+		);
+
+		$this->assertEquals(
+			$cache->getItem( 'ru', 'compiledPluralRules' ),
+			$cache->getItem( 'os', 'compiledPluralRules' ),
+			'os compiled plural rules (undefined) fallback to ru (defined)'
+		);
+
+		$this->assertNotEquals(
+			$cache->getItem( 'ksh', 'pluralRules' ),
+			$cache->getItem( 'de', 'pluralRules' ),
+			'ksh plural rules (defined) dont fallback to de (defined)'
+		);
+
+		$this->assertNotEquals(
+			$cache->getItem( 'ksh', 'compiledPluralRules' ),
+			$cache->getItem( 'de', 'compiledPluralRules' ),
+			'ksh compiled plural rules (defined) dont fallback to de (defined)'
+		);
+	}
+}