Testing regular expression with RegexDesigner.NET

We have a new QAInsigh.net content contributor today! Friend and fellow QA Engineer Rohit Mathur writes:

I was going through Scott Hanselman’s blog and he mentions (in his Ultimate Tool list) the RegEx tool RegexDesigner.NET by Chris Sells.

I found the tool very useful trying to evaluate the RegEx used in our Corillian online banking implementations. In our implementations the list of regular expressions are contained in a .config file. 

You can extract ‘the Date’ RegEx out of the .config file:

<add key="Date" value="^([0]?[1-9]|[1][0-2])[/-]([0]?[1-9]|[1|2]\d|[3][0|1])[/-](\d{4})$"/>

and then, using the RegexDesigner tool, you can test the Regular Expression to see what format/characters are allowed/disallowed: