I want to validate the maximum character limit of the text field in webdriver/java
If you have some input fields, most likely you also have some limitations related to max. number of chars which user can enter there.
Let's say you have text input field which allows user to enter up to (and inclusive) 255 chars. In this case simplified test scenarios will be:
- User enters any number of valid chars (the number of chars should be <255) -> no error message should be shown next to input field
- User enters 255 valid chards to input field -> no error message should be shown next to input field
- User enters any number of valid chars (the number of chars should be >255) -> appropriate error message should be shown next to input field.
You can pretty easilly implement those scenario using webdriver and java.
For all 3 scenarios you have to implement additional method which will generate random string of specific lenght. You can find here some examples of such methods.