public void Should_Set_FileName()
{
var sut = new ProductPresenter(mockProductView.Object, mockProductRepo.Object, mockOpenFileDialog.Object);
mockOpenFileDialog.Setup(o => o.ShowDialog()).Returns(DialogResult.OK);
sut.BrowseForFileName();
mockProductView.Verify(x => x.SetFileName(It.IsAny <string>()), Times.Once());
}