Extend APCu test with int CAS

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

tests/lib/Memcache/APCuTest.php

@@ -19,4 +19,16 @@ class APCuTest extends Cache {
 		}
 		$this->instance=new \OC\Memcache\APCu($this->getUniqueID());
 	}
+
+	public function testCasIntChanged() {
+		$this->instance->set('foo', 1);
+		$this->assertTrue($this->instance->cas('foo', 1, 2));
+		$this->assertEquals(2, $this->instance->get('foo'));
+	}
+
+	public function testCasIntNotChanged() {
+		$this->instance->set('foo', 1);
+		$this->assertFalse($this->instance->cas('foo', 2, 3));
+		$this->assertEquals(1, $this->instance->get('foo'));
+	}
 }