What are some usage examples of coverage.py?

What are some usage examples of coverage.py?

Coverage.py is a tool for measuring code coverage in Python programs. Here are a few examples of how to use it:

1. Basic Usage: Run your tests with coverage by using the command coverage run -m unittest discover.
2. Generating Reports: After running your tests, generate a report with coverage report or an HTML report with coverage html.
3. Configuring Coverage: You can create a .coveragerc file to customize settings like which files to include or exclude from coverage.

Can you explain how to generate an HTML report?

Sure! To generate an HTML report with coverage.py, follow these steps:

1. First, run your tests with coverage: coverage run -m unittest discover.
2. Then, generate the HTML report by executing: coverage html.
3. This will create a directory named htmlcov containing the report. You can open htmlcov/index.html in your web browser to view it.

What if I want to exclude certain files from coverage?

You can exclude files by modifying the .coveragerc configuration file. Add the following lines:

[run]
omit = path/to/excluded_file.py, path/to/another_excluded_file.py

This will ensure that those files are not included in the coverage report.

Is there a way to visualize the coverage data?

Yes! After generating the HTML report, you can visualize the coverage data directly in your web browser. The HTML report provides a detailed view of which lines of code were executed during tests, making it easy to identify untested parts of your code.