public async Task SegmentControllerUpsertReturnsSuccessForUpdate(string mediaTypeName)
        {
            // Arrange
            var existingModel = A.Fake <RelatedCareersSegmentModel>();

            existingModel.SequenceNumber = 123;

            var modelToUpsert = A.Fake <RelatedCareersSegmentModel>();

            modelToUpsert.SequenceNumber = 124;

            var controller             = BuildSegmentController(mediaTypeName);
            var expectedUpsertResponse = HttpStatusCode.OK;

            A.CallTo(() => FakeRelatedCareersSegmentService.GetByIdAsync(A <Guid> .Ignored)).Returns(existingModel);
            A.CallTo(() => FakeRelatedCareersSegmentService.UpsertAsync(A <RelatedCareersSegmentModel> .Ignored)).Returns(expectedUpsertResponse);

            // Act
            var result = await controller.Put(modelToUpsert).ConfigureAwait(false);

            // Assert
            A.CallTo(() => FakeRelatedCareersSegmentService.UpsertAsync(A <RelatedCareersSegmentModel> .Ignored)).MustHaveHappenedOnceExactly();
            var okResult = Assert.IsType <StatusCodeResult>(result);

            Assert.Equal((int)HttpStatusCode.OK, okResult.StatusCode);

            controller.Dispose();
        }