How can I measure test coverage in React Native using Testing Library?

How can I measure test coverage in React Native using Testing Library?

You can measure test coverage in React Native by using Jest along with the React Native Testing Library. First, ensure you have Jest configured in your project.

What do I need to add to my Jest configuration for coverage?

In your Jest configuration, you can add the collectCoverage option set to true, and specify the coverageDirectory to store the coverage reports.

Can you show me an example of a Jest configuration?

Sure! Here's a basic example:

{
  "collectCoverage": true,
  "coverageDirectory": "coverage",
  "coverageThreshold": {
    "global": {
      "branches": 80,
      "functions": 80,
      "lines": 80,
      "statements": 80
    }
  }
}

How do I run the tests to generate the coverage report?

You can run your tests with coverage by using the command jest --coverage. This will generate a coverage report in the specified directory.