public void Product_Null()
{
//Arrange
Product currentProduct = null;
string companyName = null;
if (currentProduct != null && currentProduct.ProductVendor != null) {
companyName = currentProduct.ProductVendor.CompanyName;
}
string expected = null;
//Act
var actual = companyName;
//Assert
Assert.AreEqual(expected, actual);
}