karma-cucumber-reporter is a specialized Karma plugin designed to transform test results from the Karma test runner into the Cucumber JSON format. This output is primarily intended for consumption by external tools like `cucumber-reporting` to generate comprehensive BDD-style reports. The current stable version is 1.0.4, suggesting a mature and stable state rather than active, rapid development. Its key differentiator lies in its strict requirement for a specific test structure: top-level `describe('PREFIX FEATURE', ...)` and nested `describe('SCENARIO NAME', ...)` blocks, which allows it to accurately map Karma's test outcomes to Cucumber features and scenarios. It integrates seamlessly into Karma's configuration, writing the resulting JSON to a specified file or standard output.
npm install karma-cucumber-reporterVerified import paths — ran on the pinned version, not inferred.
This quickstart demonstrates how to install and configure `karma-cucumber-reporter` in `karma.conf.js`. It includes an example test file structured with the required `PREFIX FEATURE` and `SCENARIO` `describe` blocks, showing how to produce a `cucumber-report.json` output file compatible with Cucumber reporting tools.
Structure your test files using outer `describe('YOUR_PREFIX Your Feature Name', ...)` and inner `describe('Your Scenario Name', ...)` blocks for all tests intended for the Cucumber report.Ensure `cucumberReporter.prefix` in `karma.conf.js` is identical to the prefix used in your feature `describe` blocks in test files.
Always include one or more `describe('Scenario Name', ...)` blocks within each `describe('Prefix Feature Name', ...)` block.Ensure `reporters: ['progress', 'cucumber']` and `plugins: [..., require('karma-cucumber-reporter')]` are correctly configured in `karma.conf.js`.Verify `cucumberReporter.out` is set to a valid file path (e.g., `./cucumber-report.json`) and that test `describe` blocks adhere to `describe('YOUR_PREFIX FEATURE_NAME', function() { describe('SCENARIO_NAME', function() { ... }); });` where `YOUR_PREFIX` matches the `cucumberReporter.prefix` option.Ensure your tests conform strictly to `describe('YourPrefix Your Feature Name', function() { describe('Your Scenario Name', function() { ... }); });` and that `cucumberReporter.prefix` in `karma.conf.js` exactly matches `YourPrefix`.