//both input strings, actual and expected, has different UPC-A code and different check digit which are equal 7 and 0
public void CkeckDigitByZeroPath_ActualNotExpected_ReturnsUPCcodeWithCkeckDigit()
{
Assert.AreNotEqual("111111111117", UPC_CheckDigit.Calculate_check_digit("00000000000"));
}
//both input strings, actual and expected, has different UPC-A code and different check digit which are equal 4 and 7
public void CkeckDigitByNotZeroPath_ActualNotExpected_ReturnsUPCcodeWithCkeckDigit()
{
Assert.AreNotEqual("712345678904", UPC_CheckDigit.Calculate_check_digit("11111111111"));
}
//both input strings, actual and expected, has different UPC-A code but same check digit which is equal 0
public void CkeckDigitByZeroPath_NotExpectedUPCcode_ReturnsUPCcodeWithCkeckDigit()
{
Assert.AreNotEqual("919959191090", UPC_CheckDigit.Calculate_check_digit("00000000000"));
}
public void CkeckDigitOnInvalidArgument_InvalidFormatOfUPCcode_ThrowsException()
{
Assert.Throws <FormatException>(() => UPC_CheckDigit.Calculate_check_digit("7l234567890"));
}
public void CkeckDigitOnInvalidArgument_UPCcodeIsToShort_ThrowsException()
{
Assert.Throws <ArgumentOutOfRangeException>(() => UPC_CheckDigit.Calculate_check_digit("7234567890"));
}
public void CkeckDigitOnInvalidArgument_UPCcodeIsNull_ThrowsException()
{
Assert.Throws <ArgumentNullException>(() => UPC_CheckDigit.Calculate_check_digit(null));
}
public void CkeckDigitByZeroPath__UPCcode_ReturnsUPCcodeWithCkeckDigit()
{
Assert.AreEqual("000000000000", UPC_CheckDigit.Calculate_check_digit("00000000000"));
}
public void CkeckDigitByNotZeroPath_UPCcode_ReturnsUPCcodeWithCkeckDigit(String exp_upc_code_with_check_digit, String upc_code)
{
Assert.AreEqual(exp_upc_code_with_check_digit, UPC_CheckDigit.Calculate_check_digit(upc_code));
}
