How can one “Enter CAPTCHA” using Selenium’s Web Driver ?
I don’t think it is possible to enter CAPTCHA in an automated way.
The whole idea behind it is that it’s supposed to be a test to verify that indeed a human is doing the test rather than a computer i.e. “automation”.
If you need a workaround for development/testing environment, you should ideally just disable the captcha module of the app.
Alternatively, you could ask the dev team to configure the captcha in the test environment to only accept 1 value.