How to verify a string on webpage?

Gatling (Open-Source)
1

I am testing login. Along with the HTTP response I also want to test that the page after successful login has “Welcome” string.
Which check statement should I use for the same?

2

You can use a regex. E.g.:

.check(regex(“Welcome”))

Just make sure it’s a string that isn’t also on your login page, or failed logins will still pass.

3

I am testing invalid login. After trying to login with invalid login credentials, I am getting following text on the login page:

Invalid User Name/Password credentials.



I am checking it with following check:

.check(regex("Invalid User Name/Password credentials.")))



However, the check is failing. What can be wrong here?
4

Are you sure this text message is actually in the login response, and not already in the page, displayed by some javascript?