SQL Navigator unit test frameworks and created a coverage report


We are using SQL NAVIGATOR IDE 6.7 to develop our plsql codes. We would like to write unit test to plsql codes in this IDE.
1- Which framework can we use for writing unit test?
2- How can we create a coverage report?
3- How can we write unit testing and see coverage report in Sql Navigator?

(NOTE: I have searched a lot on the internet. I saw only sql developer ide and its extension is utPlsql for unit testing. But We are using SQL Navigator IDE.)

It is urgent issue.
Thank you for your helps.
Kind regards,