The purpose of this script is to compare code coverage of two program runs, stored in two folders. The two folders should contain the same source code, but the coverage data may be different in each. The difference in coverage can be due to running two different test suites.
The tool will use gcovr to collect coverage information. Then it will display the following:
- Total number of unique lines covered by each run
- Number of unique lines covered in each file source
- Line numbers in each file that are uniquely covered
- Python 3.8
- gcovr
Before running, make sure the two source folders are present in the root directory, and contain the gcovr instrumented code and data.
Next, run the following command:
$ python3 unique_lines.py --source-1 run-1 --source-2 run-2 --summary
In the above example run-1 stores the first target program run, and run-2 stores the second target program run.
--summary is an optional argument. You can omit it if you want to get coverage line numbers.
The output is displayed in a json like format.