Upgrade guide from `TheBrainFamily/cypress-cucumber-preprocessor`
  • 12-Jun-2023
Lightrun Team
Author Lightrun Team
Upgrade guide from `TheBrainFamily/cypress-cucumber-preprocessor`

Upgrade guide from `TheBrainFamily/cypress-cucumber-preprocessor`

Lightrun Team
Lightrun Team

Explanation of the problem

The previous maintainers of the package are transferring ownership due to personal reasons, and a new maintainer is taking over. The package has undergone significant changes and improvements, including a rewrite in TypeScript, enhanced test coverage, and the introduction of new features. However, there are still some missing features and changes to the configuration options.

New Features:

  • Rewritten in TypeScript with improved test coverage.
  • Support for the “Rule” keyword.
  • Automatic filtering of specs without matching scenarios.
  • Automatic inclusion of screenshots in JSON reports.
  • Ability to add other attachments to the report.
  • JSON reports are now generated as a single file without the need for manual merging.
  • Package name has been changed to “@badeball/cypress-cucumber-preprocessor”.
  • Deprecated methods “And(..)” and “But(..)” have been replaced.

Missing Features:

  • Bundled feature files have been deprioritized.
  • Changes to configuration options with no distinction between “global” and “non-global” steps.


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Problem solution for: Upgrade guide from `TheBrainFamily/cypress-cucumber-preprocessor`

To address the ownership transfer and the related changes in the package, here are the recommended steps to solve the problem:

  1. Complete the Transfer: Ensure that the ownership transfer process is smoothly completed between the previous maintainers and the new maintainer. This may involve necessary administrative tasks and coordination.
  2. Test and Verify: Thoroughly test the re-implemented package and its new features to identify any potential issues or bugs. Pay special attention to areas where test coverage was previously lacking. Use automated testing frameworks and tools to validate the functionality and compatibility of the package.
  3. Address Missing Features: Evaluate the missing features, such as bundled feature files, and determine their importance and feasibility. If deemed necessary, work on implementing these features, considering the associated maintenance cost and performance implications.
  4. Communicate with Users: Engage with the user community by actively seeking feedback and addressing their concerns. Encourage users to report any issues or questions they encounter with the package. Respond promptly, provide support, and resolve any reported issues to ensure a positive user experience.
  5. Maintain Documentation: Update the package documentation to reflect the changes, new features, and configuration options. Ensure that the documentation is comprehensive, clear, and accessible to assist users in understanding and utilizing the package effectively.
  6. Collaborate with the Community: Foster collaboration and engagement with the user community and other contributors. Encourage discussions, share knowledge, and address community concerns and suggestions. This collaboration can lead to further improvements and help maintain the package’s quality and longevity.

By following these steps, the new maintainer can successfully address the ownership transfer, ensure the package’s stability, and provide ongoing support and improvements to meet the needs of the user community.


Other popular problems with cypress-cucumber-preprocessor

Problem 1: Step Definitions Not Found

One common issue with cypress-cucumber-preprocessor is the inability to find step definitions during test execution. This can occur when the specified step definitions are not correctly configured or when there are discrepancies between the defined step patterns and the actual step definitions. The following error message may be encountered:


Error: Step definition not found for step: "Given I am on the login page"



To resolve this issue, ensure that the step definitions are properly configured and located in the expected directories. Verify that the step patterns defined in the feature files match the step definitions exactly. Here’s an example configuration demonstrating the proper setup:


  "name": "my project",
  "dependencies": {},
  "devDependencies": {},
  "cypress-cucumber-preprocessor": {
    "stepDefinitions": "cypress/support/step_definitions/**/*.js"


Make sure to adjust the "stepDefinitions" path according to your project’s directory structure.

Problem 2: Inconsistent Test Results

Another problem that can occur with cypress-cucumber-preprocessor is inconsistent test results. Tests may pass or fail inconsistently, even when the application behavior remains the same. This can lead to confusion and difficulty in identifying the root cause of failures.


To address this issue, it is crucial to ensure that the tests and the application environment are set up consistently. Consider the following factors:

  1. Test Environment: Make sure the test environment is properly configured, including any necessary dependencies, fixtures, or test data.
  2. Test Isolation: Ensure that tests are isolated from one another to avoid interference or shared state. Use appropriate mechanisms, such as beforeEach and afterEach hooks, to set up and clean up the test environment.
  3. Test Stability: Verify that the application under test is stable and reliable. Monitor for any external factors that may introduce variability in test results, such as network connectivity issues or server timeouts.

Problem 3: Performance Degradation

Cypress tests powered by cypress-cucumber-preprocessor may experience performance degradation, especially when dealing with large feature files or complex scenarios. Tests may become slow and impact the overall test execution time.


To improve performance, consider the following strategies:

  1. Test Optimization: Review the feature files and step definitions to identify any bottlenecks or areas where optimizations can be applied. Refactor and simplify the steps, eliminate unnecessary waits or delays, and use efficient selectors and assertions.
  2. Test Parallelization: If your test suite is extensive, consider running tests in parallel to distribute the workload across multiple machines or processes. Cypress provides parallelization capabilities that can significantly reduce execution time.
  3. Test Data Management: Efficiently manage test data by leveraging techniques such as test data factories, data caching, or database optimizations. This can help reduce the setup time and improve overall test performance.


A brief introduction to cypress-cucumber-preprocessor

Cypress-cucumber-preprocessor is a powerful testing tool that integrates Cypress, a popular end-to-end testing framework, with Cucumber, a behavior-driven development (BDD) tool. It allows developers and testers to write and execute feature files in a human-readable format using the Gherkin syntax, along with corresponding step definitions. Cypress-cucumber-preprocessor enables the execution of Cucumber scenarios as Cypress tests, providing a seamless and expressive way to perform BDD-style testing.

The tool enhances the capabilities of Cypress by enabling the use of Given-When-Then steps and the organization of tests into feature files. It simplifies the process of writing and maintaining test scenarios by providing a structured approach that promotes collaboration between technical and non-technical stakeholders. Cypress-cucumber-preprocessor leverages the power of Cypress, offering features such as powerful selectors, intelligent assertions, and easy-to-use test runners, while maintaining the natural language readability and clarity provided by Cucumber’s Gherkin syntax.

By combining the flexibility and expressiveness of Cucumber with the robustness and simplicity of Cypress, cypress-cucumber-preprocessor empowers teams to create comprehensive and maintainable end-to-end test suites. It facilitates the adoption of behavior-driven development practices and encourages clear communication and collaboration among team members. With its seamless integration and extensive capabilities, cypress-cucumber-preprocessor is a valuable tool for implementing BDD testing in Cypress-based projects.

Most popular use cases for cypress-cucumber-preprocessor


  1. Behavior-driven Development (BDD) Testing: Cypress-cucumber-preprocessor enables the use of Cucumber’s Gherkin syntax for writing feature files and corresponding step definitions. This allows teams to adopt a BDD approach to testing, where test scenarios are written in a human-readable format that promotes collaboration and clarity. Here’s an example of a feature file written in Gherkin syntax:


Feature: Login Functionality
  As a user
  I want to login to my account
  So that I can access the protected features

  Scenario: Successful login
    Given I am on the login page
    When I enter my valid credentials
    And I click the login button
    Then I should be redirected to the dashboard
    And I should see a welcome message


  1. Integration with Cypress: Cypress-cucumber-preprocessor seamlessly integrates with Cypress, a powerful end-to-end testing framework. It leverages Cypress’s features such as powerful selectors, intelligent assertions, and easy-to-use test runners, providing a solid foundation for executing BDD-style tests. Test scenarios written using the Gherkin syntax are transformed into Cypress tests, allowing teams to take advantage of Cypress’s capabilities while maintaining the readability and clarity of the original feature files.
  2. Collaboration and Maintainability: By using cypress-cucumber-preprocessor, teams can enhance collaboration between technical and non-technical stakeholders. The clear and descriptive nature of Gherkin scenarios promotes better communication and understanding of the expected behavior of the application. Furthermore, the separation of feature files and step definitions allows for easier maintenance and reusability of test code. Teams can work together to write and maintain feature files, while developers can implement the corresponding step definitions in Cypress, resulting in a maintainable and scalable test suite.



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