Coverage:

It is a tool used for showing the percentage of your codebase covered by tests.

Test Coverage is an important indicator of software quality and an essential part of software maintenance. It helps in evaluating the test cases by providing the data on different coverage items. It is a useful tool for finding untested part of a code.

Test coverage can help in monitoring the quality of testing and assist in directing the test generators to create test cases that cover areas that have not been tested. It helps to measure the quality and identifies unnecessary test cases which will not increase coverage.

Benefits of Test Coverage:

• Defect prevention in the project.
• It creates additional test cases to increase coverage.
• It helps in determining a quantitative measure of code coverage, which indirectly measures the quality of the application or product.

Installation

Pip install coverage

Use "coverage run" to run your program and gather data:

coverage run manage.py test

coverage report -m  # provides the report for the tests

Individual app test can be run using the command

coverage run --source=app1,app2 manage.py test