Is there an option to show all test descriptions when I run jest tests?

When running Jest tests, it can be helpful to see all the test descriptions in order to get a better understanding of what each test is doing. By default, Jest only shows the test descriptions for the tests that are currently running or have failed. However, there are a few options available to show all test descriptions.

Option 1: Using the –verbose flag

The simplest way to show all test descriptions is to use the --verbose flag when running your Jest tests. This flag provides more detailed output, including all test descriptions. Here’s an example:

npx jest --verbose

Option 2: Using the –listTests flag

Another option is to use the --listTests flag, which will print a list of all the test files and their descriptions without actually running the tests. This can be useful if you just want to see the test descriptions without running the tests themselves. Here’s an example:

npx jest --listTests

Option 3: Using a custom reporter

If you want more control over how the test descriptions are displayed, you can create a custom reporter. Jest allows you to define custom reporters that can modify or enhance the default test output. Here’s an example of a custom reporter that prints all test descriptions:

// custom-reporter.js
class CustomReporter {
  onTestResult(test, testResult) {
    console.log(test.description);
  }
}

module.exports = CustomReporter;

To use this custom reporter, you’ll need to specify it in your Jest configuration. Add the following to your jest.config.js file:

// jest.config.js
module.exports = {
  reporters: ['/custom-reporter.js']
};

Now, when you run your Jest tests, the custom reporter will be used and all test descriptions will be printed.

These are the three options available to show all test descriptions when running Jest tests. Whether you prefer the simplicity of the --verbose flag, the quick overview provided by the --listTests flag, or the flexibility of a custom reporter, you can choose the option that best suits your needs.