public async Task GetSamplesAsyncShouldReturnSamples()
        {
            //arrange
            Sample sample = new Sample();

            _projectBLMock.Setup(i => i.GetSamplesAsync());
            SampleController sampleController = new SampleController(_projectBLMock.Object);

            //act
            var result = await sampleController.GetSamplesAsync();

            //assert
            Assert.IsType <OkObjectResult>(result);
        }