public void GetSubstringByKey_InputStringIsNotEmpty_KeyIsNotEmptyAndIsFound_SubstringOptionsIsNotDefined_ReturnOriginalSubstring()
{
// Arrange
string expectedResult = "Alan follows Martin";
string key = "follows";
SubstringOptions optionIsInvalid = (SubstringOptions)2;
// Act
string actualResult = expectedResult.GetSubstringByKey(key, optionIsInvalid);
// Assert
Assert.AreEqual(expectedResult, actualResult);
}
/// <summary>
///
/// </summary>
/// <param name="str"></param>
/// <param name="key"></param>
/// <param name="option"></param>
/// <returns>Original string if it does not contain the key, otherwise a substring depending on the option specified.</returns>
public static string GetSubstringByKey(this string str, string key, SubstringOptions option)
{
if (string.IsNullOrEmpty(str) == true || string.IsNullOrEmpty(key) == true || str.Contains(key) == false)
{
return str;
}
str = str.Trim();
key = key.Trim();
int keyIndex = str.IndexOf(key);
switch (option)
{
case SubstringOptions.BeforeKey:
return str.Substring(0, keyIndex);
case SubstringOptions.AfterKey:
return str.Substring(keyIndex + key.Length);
default:
//Log this???
return str;
}
}
/// <summary>
///
/// </summary>
/// <param name="str"></param>
/// <param name="key"></param>
/// <param name="option"></param>
/// <returns>Original string if it does not contain the key, otherwise a substring depending on the option specified.</returns>
public static string GetSubstringByKey(this string str, string key, SubstringOptions option)
{
if (string.IsNullOrEmpty(str) == true || string.IsNullOrEmpty(key) == true || str.Contains(key) == false)
{
return(str);
}
str = str.Trim();
key = key.Trim();
int keyIndex = str.IndexOf(key);
switch (option)
{
case SubstringOptions.BeforeKey:
return(str.Substring(0, keyIndex));
case SubstringOptions.AfterKey:
return(str.Substring(keyIndex + key.Length));
default:
//Log this???
return(str);
}
}
internal static string SubstringBetween(string source, string leftDelimiter, string rightDelimiter, int startingIndex, SubstringOptions options)
{
bool flag = (options & SubstringOptions.Backward) == SubstringOptions.Backward;
int num = (leftDelimiter != null) ? (flag ? source.LastIndexOf(leftDelimiter, startingIndex) : source.IndexOf(leftDelimiter, startingIndex)) : 0;
if (num == -1)
{
if ((options & SubstringOptions.IgnoreMissingLeftDelimiter) == SubstringOptions.None)
{
return(null);
}
num = 0;
}
else if (leftDelimiter != null)
{
num += leftDelimiter.Length;
}
if (num < source.Length)
{
int num2 = (rightDelimiter != null) ? (flag ? source.LastIndexOf(rightDelimiter, num) : source.IndexOf(rightDelimiter, num)) : source.Length;
if (num2 == -1)
{
if ((options & SubstringOptions.IgnoreMissingRightDelimiter) == SubstringOptions.None)
{
return(null);
}
num2 = source.Length;
}
return(source.Substring(num, num2 - num));
}
if (rightDelimiter != null && (options & SubstringOptions.IgnoreMissingRightDelimiter) == SubstringOptions.None)
{
return(null);
}
return(string.Empty);
}
internal static string SubstringBetween(string source, string leftDelimiter, string rightDelimiter, SubstringOptions options)
{
return(Util.SubstringBetween(source, leftDelimiter, rightDelimiter, ((options & SubstringOptions.Backward) == SubstringOptions.Backward) ? Math.Max(0, source.Length - 1) : 0, options));
}