58 lines
1.9 KiB
Markdown
58 lines
1.9 KiB
Markdown
{@a code-coverage}
|
|
|
|
# Find out how much code you're testing
|
|
|
|
The CLI can run unit tests and create code coverage reports.
|
|
Code coverage reports show you any parts of your code base that may not be properly tested by your unit tests.
|
|
|
|
<div class="alert is-helpful">
|
|
|
|
For the sample app that the testing guides describe, see the <live-example embedded-style noDownload>sample app</live-example>.
|
|
|
|
For the tests features in the testing guides, see <live-example stackblitz="specs" noDownload>tests</live-example>.
|
|
|
|
</div>
|
|
|
|
|
|
To generate a coverage report run the following command in the root of your project.
|
|
|
|
<code-example language="sh" class="code-shell">
|
|
ng test --no-watch --code-coverage
|
|
</code-example>
|
|
|
|
When the tests are complete, the command creates a new `/coverage` folder in the project. Open the `index.html` file to see a report with your source code and code coverage values.
|
|
|
|
If you want to create code-coverage reports every time you test, you can set the following option in the CLI configuration file, `angular.json`:
|
|
|
|
```
|
|
"test": {
|
|
"options": {
|
|
"codeCoverage": true
|
|
}
|
|
}
|
|
```
|
|
|
|
## Code coverage enforcement
|
|
|
|
The code coverage percentages let you estimate how much of your code is tested.
|
|
If your team decides on a set minimum amount to be unit tested, you can enforce this minimum with the Angular CLI.
|
|
|
|
For example, suppose you want the code base to have a minimum of 80% code coverage.
|
|
To enable this, open the [Karma](https://karma-runner.github.io) test platform configuration file, `karma.conf.js`, and add the following in the `coverageIstanbulReporter:` key.
|
|
|
|
```
|
|
coverageIstanbulReporter: {
|
|
reports: [ 'html', 'lcovonly' ],
|
|
fixWebpackSourcePaths: true,
|
|
thresholds: {
|
|
statements: 80,
|
|
lines: 80,
|
|
branches: 80,
|
|
functions: 80
|
|
}
|
|
}
|
|
```
|
|
|
|
The `thresholds` property causes the tool to enforce a minimum of 80% code coverage when the unit tests are run in the project.
|
|
|