public function setUp() { $this->event = $this->getMockBuilder('\\StateMachine\\EventInterface')->disableOriginalConstructor()->getMock(); $this->event->expects($this->any())->method('__toString')->willReturn('eventName'); $this->flag = $this->getMockBuilder('\\StateMachine\\Flag')->disableOriginalConstructor()->getMock(); $this->flag->expects($this->any())->method('__toString')->willReturn('flagName'); }