public async Task ExecutePostProcessingAsyncWithoutCancellationToken_GetCalledBy_ReadAsMultipartAsync()
        {
            // Arrange
            MultipartFormDataContent multipartContent           = new MultipartFormDataContent();
            Mock <MultipartFormDataStreamProvider> mockProvider = new Mock <MultipartFormDataStreamProvider>(ValidPath);

            mockProvider.CallBase = true;

            // Act
            var provider = await multipartContent.ReadAsMultipartAsync(mockProvider.Object);

            // Assert
            mockProvider.Verify(p => p.ExecutePostProcessingAsync(), Times.Once());
        }