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docs: replace deprecated karma-coverage-istanbul-reporter (#41246) 

'karma-coverage-istanbul-reporter' usage has been deprecated since version 11.
Please install 'karma-coverage' and update 'karma.conf.js.' For more info, see https://github.com/karma-runner/karma-coverage/blob/master/README.md

PR Close #41246
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Manuele Dones 2021-03-17 18:14:44 +01:00 committed by Misko Hevery
parent e23994191c
commit ac9c4289e0
1 changed files with 18 additions and 11 deletions
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25
aio/content/guide/testing-code-coverage.md
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@ -38,20 +38,27 @@ 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. 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. 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. To enable this, open the [Karma](https://karma-runner.github.io) test platform configuration file, `karma.conf.js`, and add the `check` property in the `coverageReporter:` key.
``` ```js
coverageIstanbulReporter: { coverageReporter: {
reports: [ 'html', 'lcovonly' ], dir: require('path').join(__dirname, './coverage/<project-name>'),
fixWebpackSourcePaths: true, subdir: '.',
thresholds: { reporters: [
{ type: 'html' },
{ type: 'text-summary' }
],
check: {
global: {
statements: 80, statements: 80,
lines: 80,
branches: 80, branches: 80,
functions: 80 functions: 80,
lines: 80
}
} }
} }
``` ```
The `thresholds` property causes the tool to enforce a minimum of 80% code coverage when the unit tests are run in the project. The `check` property causes the tool to enforce a minimum of 80% code coverage when the unit tests are run in the project.
You can find more info about the different coverage configuration options [here](https://github.com/karma-runner/karma-coverage/blob/master/docs/configuration.md).