public string Parse(string input)
{
var finder = new ControlStringFinder('{', ':', '}', '[', ']');
var controlStrings = finder.FindAllControlStrings(input);
string result = input;
foreach (var controlString in controlStrings)
{
if (matcher.Matches(controlString))
{
var originalString = input.Substring(controlString.Index, controlString.Length);
var specialPrepending = finder.FindPrependingSpecial(originalString.Substring(1, originalString.Length - 2));
var specialPostpending = finder.FindPostpendingSpecial(originalString.Substring(1, originalString.Length - 2));
var newString = matcher.Match(controlString);
newString = string.IsNullOrEmpty(newString) ? newString : specialPrepending + newString + specialPostpending;
result = result.Replace(originalString, newString);
}
}
return result;
}
public void FindPostpendingSpecial_IgnoresLeadingCharactersOutsideSpecialStringStarter()
{
const char SpecialStringStarter = '[';
const char SpecialStringTerminator = ']';
var input = $"foo{SpecialStringStarter}bar{SpecialStringTerminator}";
var unit = new ControlStringFinder('{', ':', '}', SpecialStringStarter, SpecialStringTerminator, 'd');
var expected = "bar";
// Act
var result = unit.FindPostpendingSpecial(input);
result.ShouldBe(expected);
}
public void FindPostpendingSpecial_WhenInputDoesNotEndWithSpecialStringTerminator_ReturnsEmptyString()
{
const char SpecialStringStarter = '[';
const char SpecialStringTerminator = ']';
var input = $"{SpecialStringStarter}bar{SpecialStringTerminator}foo";
var unit = new ControlStringFinder('{', ':', '}', SpecialStringStarter, SpecialStringTerminator, 'd');
var expected = string.Empty;
// Act
var result = unit.FindPostpendingSpecial(input);
result.ShouldBe(expected);
}
public void FindPostpendingSpecial_WhenInputIsNull_ThrowsArgumentNullException(ControlStringFinder unit)
{
Should.Throw <ArgumentNullException>(() => unit.FindPostpendingSpecial(null));
}
public void FindPostpendingSpecial_WhenInputIsEmptyString_ReturnsEmptyString(ControlStringFinder unit)
{
var actual = unit.FindPostpendingSpecial(string.Empty);
actual.ShouldBe(string.Empty);
}