In this view, you can test your form. The fields in your form will
be rendered as a simple HTML form. The fields are grouped and come
in a certain order; this can be defined with the form's order
tab.
You can fill in some values and click on the Test button to
submit the form.
You will now see the test form again. If all of your input was
successfully validated by the fields in the form, you the message
All fields were validated correctly above your form.
If some of the fields could not be validated, you will instead see
the message Not all fields could be validated appear, and a list
with the validation errors:
field_id indicates the field that gave this validation error.error_key is the name of the error message; you can find it
on that field's messages tab.error_text is the actual text associated with that
'error_key'; you can modify it on the field's messages tab.