protected function setUp() { parent::setUp(); $this->frameBuffer = $this->getMock(FrameBuffer::class); $this->frameBuffer->expects($this->any())->method('getHeight')->willReturn(self::TEST_HEIGHT); $this->frameBuffer->expects($this->any())->method('getWidth')->willReturn(self::TEST_WIDTH); $this->encoder = new JsonFrameEncoder($this->frameBuffer); }