5 - Test what you change with Carryforward Flags
Although Flags can help separate out different test suites, not every project will run the entire test suite for every commit. Carryforward Flags can be used here to maintain consistent coverage values.
Update CI workflows to run on applicable changes
Pull the latest frommain and create a new branchstep5
git checkout maingit pullgit checkout -b 'step5'Let’s set up our demo repository to only run workflows if the affected code is changed.
GitLab CI
Edit both sections of the workflow
pipelines: default: - parallel: - step: condition: changesets: includePaths: - "api/**" ... name: api ... - step: condition: changesets: includePaths: - "web/**" ... name: frontend ...Now, if we make a change to only code in theweb directory, thefrontend workflow will run.
Add coverage to the frontend
Let’s add a test to our calculator.
... test('test operation', () => { const calculator = new calc.Calculator(); calculator.chooseOperation('+'); expect(calculator.operation).toBeUndefined(); calculator.appendNumber(1); calculator.appendNumber(2); calculator.chooseOperation('+'); expect(calculator.currentOperand).toBe(''); expect(calculator.operation).toBe('+'); expect(calculator.previousOperand).toBe('12'); calculator.appendNumber(3); calculator.appendNumber(4); expect(calculator.currentOperand).toBe('34'); expect(calculator.operation).toBe('+'); expect(calculator.previousOperand).toBe('12'); })...Runcd web && npm run test to ensure that the test has been added correctly. You should expect the output to match below.
PASS static/js/calculator.test.js Calculator test suite ✓ calculator clears (1 ms) ✓ calculator can input numbers ✓ calculator can deletes (1 ms) ✓ test operation (1 ms)---------------|---------|----------|---------|---------|-------------------File | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s---------------|---------|----------|---------|---------|-------------------All files | 29.5 | 21.21 | 55.55 | 30.35 | calculator.js | 29.5 | 21.21 | 55.55 | 30.35 | 29,37-113---------------|---------|----------|---------|---------|-------------------Test Suites: 1 passed, 1 totalTests: 4 passed, 4 totalSnapshots: 0 totalTime: 0.47 s, estimated 1 sTurn Flags into Carryforward Flags
Finally, we will need to make a change to ourcodecov.yml file to ensure that Flags are marked as Carryforward.
...flag_management: default_rules: carryforward: true individual_flags: ......Commit and push your changes to GitHub.
git add .git commit -m 'step5: add Carryforward Flags'git push origin step5Notice that only thefrontend workflow runs. In theFlag section of the Codecov comment, you will only see thefrontend Flag.
Conclusion
At this point, you have worked through the major features of Codecov. From here, you can explore other advanced aspects of the product.
Updated almost 2 years ago