// Converts parameter "inputNumberText" with parameter "sourceBaseText" into
// a text number with the base of "targetBaseText" and returns it.
private string GetConvertedTextNumberFromBaseTextNumber(string inputNumberText, string sourceBaseText, string targetBaseText, out bool validInput)
{
validInput = false;
// Check if any input by the user is empty or has only spaces
if (inputNumberText.Trim() == String.Empty)
{
return("Enter a number to be converted !");
}
else if (sourceBaseText.Trim() == String.Empty)
{
return("Enter a number as source base for the number to be converted !");
}
else if (targetBaseText.Trim() == String.Empty)
{
return("Enter number as target base for the number to be converted !");
}
// Checks if strings for source base and target base are made of only digits.
if (this.IsOnlyDigits(sourceBaseText) == false)
{
return("Number as source base must be only digits !");
}
else if (this.IsOnlyDigits(targetBaseText) == false)
{
return("Number as target base must be only digits !");
}
if (Int32.TryParse(sourceBaseText, out int sourceBase) == false)
{
return("The number for the source base must be only digits !");
}
if (Int32.TryParse(targetBaseText, out int targetBase) == false)
{
return("The number for the target base must be only digits !");
}
// First step for conversion by converting input text number into a numeric value.
// Additionally checking if input text number has only valid chars and the base is greater than zeor
int numericValue;
try
{
numericValue = NumberBaseConverting.NumberValueFromTextNumber(inputNumberText, sourceBase);
if (numericValue == -1)
{
return($"source base \"{sourceBase}\" is not high enough for the input text number !");
}
}
catch (ArgumentOutOfRangeException)
{
return($"The number for source base \"{sourceBase}\" is not greater than zero!");
}
catch (ArgumentException)
{
return($"The input text number \"{inputNumberText}\" is has not valid symbols !");
}
// Last step of conversion. Converting numeric value into text number as a
try
{
string result = NumberBaseConverting.TextNumberFromNumberValue(numericValue, targetBase);
validInput = true;
return(result);
}
catch (ArgumentOutOfRangeException)
{
return($"The number for target base \"{targetBase}\" is not greater than zero !");
}
}
public static void NumberValueFromTextNumber_ShouldThrowTextNumberIsEmpty()
=> Assert.Throws <ArgumentException>("textNumber", () => NumberBaseConverting.NumberValueFromTextNumber("", 2));
public static void NumberValueFromTextNumber_ShouldThrowWhenTextNumberIsNull()
=> Assert.Throws <ArgumentNullException>("textNumber", () => NumberBaseConverting.NumberValueFromTextNumber(null, 2));
public static void NumberValueFromTextNumber_ShouldThrowWhenBaseIsOutOfValidRange(int invalidBase)
=> Assert.Throws <ArgumentOutOfRangeException>("sourceBase", () => NumberBaseConverting.NumberValueFromTextNumber("1", invalidBase));
public static void NumberValueFromTextNumber_ShouldThrowWhenTextNumberHasInvalidSymbol(string unvalidTextNumber, int validBase)
=> Assert.Throws <ArgumentException>("textNumber", () => NumberBaseConverting.NumberValueFromTextNumber(unvalidTextNumber, validBase));
public static void NumberValueFromTextNumber_ShouldConvertTextNumberToNumericValueRight(string textNumber, int sourceBase, int expected) => Assert.Equal(expected, NumberBaseConverting.NumberValueFromTextNumber(textNumber, sourceBase));