Tips for troubleshooting TypeScript integration tests within Pycharm

Currently, I have been utilizing PyCharm to code in typescript. To run tests in the integration directory, I execute npm run test:integration. However, I am now looking to debug the tests. The directory structure looks like this:

my_project
 /src
 /tests
   /integration

For running tests, I am using Jest. I have configured a new Jest setup, but unfortunately, it is not working and showing an error message:

No tests found In ~/PycharmProjects/my_project/src

Even though the test directory is defined as: 

~/PycharmProjects/my_project/tests/integration

What steps should I take to resolve this issue?

typescriptjestjspycharm

Answer №1

Once you've finished installing, it's important to set up Jest in PyCharm. You can do this by navigating to the run menu and selecting Edit Configurations. Follow the instructions provided in this link to properly configure Jest in PyCharm. This will ensure that PyCharm can identify and run your Jest integration tests accurately, allowing you to debug them effectively. Since you've already completed steps 1 to 3, you can skip those.

Below is a thorough step-by-step guide on creating a Jest run configuration in PyCharm for your integration tests, rephrased from their original instructions:

Step-by-Step Guide for Creating a Jest Run Configuration

  1. Access the Run/Debug Configuration Dialog:

    • Go to Run in the main menu.
    • Choose Edit Configurations....

  2. Add a New Jest Configuration:

    • Click the + button on the left-hand side.
    • Select Jest from the list.

  3. Specify the Node.js Interpreter:

    • Node Interpreter: Opt for the Project alias to use the project's default interpreter. PyCharm typically detects this automatically.
    • Alternatively, select another configured local or remote interpreter, or click the Browse button to configure a new one.

  4. Indicate the Jest Package Location:

    • Jest Package: Point to the location of the jest package. This is typically found at 
      <your_project_root>/node_modules/jest/bin/jest.js
      .

  5. Set the Working Directory:

    • Working Directory: By default, this is set to the project root. If necessary, adjust it to the desired folder, such as ~/PycharmProjects/my_project.

  6. Specify the Tests to Run:

    • Tests: Specify a specific test, suite, entire test file, or a folder containing test files. For your scenario, it should be 
      ~/PycharmProjects/my_project/tests/integration
      .

  7. Optionally Specify the Jest Configuration File:

    • Configuration File: Optionally, provide the jest.config.js or jest.config.ts file. Click the Browse button to select the file or enter the path directly.
    • If this field is left empty, PyCharm will search for a package.json file with a jest key or generate a default Jest configuration.

  8. Additional Settings:

    • Jest Options: To activate watch mode, include the --watch flag.
    • Environment Variables: Specify any necessary environment variables, which will be accessible in process.env.
    • Node Options: Add Node.js-specific command-line options, like --inspect for debugging purposes.

Example Jest Configuration

Below is an example setup for the Run/Debug Configuration: Jest dialog:

  1. Node Interpreter: Project (auto-filled by PyCharm).
  2. Jest Package: 
    ~/PycharmProjects/my_project/node_modules/jest/bin/jest.js
    .
  3. Working Directory: ~/PycharmProjects/my_project.
  4. Tests: 
    ~/PycharmProjects/my_project/tests/integration
    .
  5. Configuration File: 
    ~/PycharmProjects/my_project/jest.config.js
    (if applicable).

Learn how to set up a jest.config.js

Running and Debugging Tests

  1. Select the Jest Configuration:

    • From the dropdown menu in the top-right corner of PyCharm, select the Jest configuration you just created.

  2. Run or Debug:

    • To start the tests, click the Run or Debug button.

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