To add a regular expression in a test, in the Test editor, select a step for which to apply the expression and select the matches regex or doesn't match regex operator.
To verify a regular expression before applying it to the test, type the expression and click the
Toggle regular expression assistant icon . In the
Test regular expression tab, type the text that matches the regular
expression. If the match is correct, the color of the matching text changes.
The Captured Group tab displays the groups of regular expressions used within parentheses. The Overall group appears by default.