What are the best practices for using vue-cli-plugin-testing-coverage with Jest?

What are the best practices for using vue-cli-plugin-testing-coverage with Jest?

When using vue-cli-plugin-testing-coverage with Jest, it's important to ensure your tests are comprehensive. Start by configuring your Jest settings to include coverage thresholds, which will help you maintain a high standard of code quality.

How can I set up coverage thresholds in Jest?

You can set up coverage thresholds in your Jest configuration file (jest.config.js) by adding a 'coverageThreshold' property. For example:

module.exports = {
  coverageThreshold: {
    global: {
      branches: 80,
      functions: 80,
      lines: 80,
      statements: 80,
    },
  },
};

What should I do if my coverage is below the threshold?

If your coverage is below the threshold, review your tests to identify untested areas of your code. You may need to write additional tests to cover those gaps, ensuring that all critical paths and edge cases are tested.

Are there any tools to help visualize test coverage?

Yes, tools like Istanbul and its integration with Jest can help visualize test coverage. You can generate HTML reports that provide a detailed view of which lines of code are covered by tests.