| .. _lcov_code_coverage: |
| |
| Code coverage with lcov |
| ======================= |
| |
| Prerequisites |
| ------------- |
| |
| Ensure required packages are installed: |
| |
| :: |
| |
| $ make install-deps |
| |
| The Linux gcov and lcov tools can be fussy about gcc / g++ compiler |
| versions. As of this writing, Ubuntu 22.04 gcov / lcov works with |
| the latest gcc version (``11.3.0``). |
| |
| Generate coverage for a test case |
| --------------------------------- |
| |
| As a first run, in order to generate the coverage report of |
| a specific plugin or test, run for example |
| |
| :: |
| |
| $ make test-cov TEST=fib |
| |
| Then open the file ``.build-root/test-coverage/html/index.html`` in a Chrome browser. |
| |
| Improving test coverage |
| ----------------------- |
| |
| When doing modifications on the test cases, you can run |
| |
| :: |
| |
| # This will run the test & report the result in the coverage data |
| $ make test-cov-build TEST=fib |
| |
| # This will generate the html report with the current coverage data |
| $ make test-cov-post |
| |
| # To reset the coverage data use |
| $ make test-cov-prep |