How to use the COVERAGE library to generate code coverage and report

How to use the COVERAGE library to generate code coverage and report 1 Introduction: In software development, the code coverage is to measure whether the test case covers the measurement of all possible execution paths in the code.It can help developers evaluate the quality of testing, discover the unscrumable code area, and improve the test kit.Coverage is a Python library that can generate detailed code coverage reports to help developers better understand and analyze the test coverage. 2. Install COVERAGE: First, make sure that Python and PIP have been installed.Then execute the following commands in the command line to install the COVERAGE library: pip install coverage 3. Configure COVERAGE: Create a configuration file `.coveragerc` under the project root directory that needs to be analyzed by code coverage. This file can be used to specify the configuration option of the COVERAGE.The following is an example configuration file: [run] source = your_module branch = True [report] exclude_lines = pragma: no cover def __repr__ if self\.debug [html] directory = coverage_html_report -` [run] `part is used to specify the source code directory or module that needs to be analyzed by coverage. -` [REPORT] The part is used to configure the reporting option, which can specify the rows to be eliminated and other options. -` [html] The part is used to specify the directory when generating HTML reports. 4. Run test: Before the code coverage analysis is performed, test cases need to be performed in order to collect coverage data.According to your project, perform the corresponding test command. 5. Generate coverage report: Make sure to run the following command under the root directory of the project: coverage run -m your_test_module.py The above commands run test cases and collect coverage data. 6. Generate coverage report: Run the following command generation coverage report: coverage html The above command will generate a coverage of a HTML format and save it in the directory specified in the configuration file. 7. View coverage report: Use any browser to open the `index.html` file specified in the configuration file, and you will be able to view the detailed code coverage report generated. This is the basic step of generating code coverage using the Coverage library.By analyzing the code coverage report, you can understand the test coverage and improve the test kit as needed.