public function testDeleteKey() { $connectionMock = $this->getMock('\\OC\\DB\\Connection', array(), array(), '', false); $connectionMock->expects($this->once())->method('delete')->with($this->equalTo('*PREFIX*preferences'), $this->equalTo(array('userid' => 'grg', 'appid' => 'bar', 'configkey' => 'foo'))); $preferences = new OC\Preferences($connectionMock); $preferences->deleteKey('grg', 'bar', 'foo'); }