1 files changed, 56 insertions, 0 deletions
diff --git a/tests/phpunit/includes/libs/HashRingTest.php b/tests/phpunit/includes/libs/HashRingTest.php
new file mode 100644
index 00000000..68dfea1f
--- /dev/null
+++ b/tests/phpunit/includes/libs/HashRingTest.php
@@ -0,0 +1,56 @@
+<?php
+
+/**
+ * @group HashRing
+ */
+class HashRingTest extends MediaWikiTestCase {
+	/**
+	 * @covers HashRing
+	 */
+	public function testHashRing() {
+		$ring = new HashRing( array( 's1' => 1, 's2' => 1, 's3' => 2, 's4' => 2, 's5' => 2, 's6' => 3 ) );
+
+		$locations = array();
+		for ( $i = 0; $i < 20; $i++ ) {
+			$locations[ "hello$i"] = $ring->getLocation( "hello$i" );
+		}
+		$expectedLocations = array(
+			"hello0" => "s5",
+			"hello1" => "s6",
+			"hello2" => "s2",
+			"hello3" => "s5",
+			"hello4" => "s6",
+			"hello5" => "s4",
+			"hello6" => "s5",
+			"hello7" => "s4",
+			"hello8" => "s5",
+			"hello9" => "s5",
+			"hello10" => "s3",
+			"hello11" => "s6",
+			"hello12" => "s1",
+			"hello13" => "s3",
+			"hello14" => "s3",
+			"hello15" => "s5",
+			"hello16" => "s4",
+			"hello17" => "s6",
+			"hello18" => "s6",
+			"hello19" => "s3"
+		);
+
+		$this->assertEquals( $expectedLocations, $locations, 'Items placed at proper locations' );
+
+		$locations = array();
+		for ( $i = 0; $i < 5; $i++ ) {
+			$locations[ "hello$i"] = $ring->getLocations( "hello$i", 2 );
+		}
+
+		$expectedLocations = array(
+			"hello0" => array( "s5", "s6" ),
+			"hello1" => array( "s6", "s4" ),
+			"hello2" => array( "s2", "s1" ),
+			"hello3" => array( "s5", "s6" ),
+			"hello4" => array( "s6", "s4" ),
+		);
+		$this->assertEquals( $expectedLocations, $locations, 'Items placed at proper locations' );
+	}
+}