This server allows you to capture a browser to run tests in, loads the test targets to the captured browser, controls the testing process, and exchanges data between the browser and PyCharm, so you can view test results without leaving the IDE.
The test server does not necessarily have to be on your machine, it can be launched right from PyCharm through the Cucumber.js test runner. Cucumber.js runs tests that are called features and are written in the Gherkin language. Each feature is described in a separate file with the extension
On this page:
Before you start
- Download and install Node.js. The runtime environment is required for two reasons:
- The Cucumber.js test runner is started through Node.js.
- NPM, which is a part of the runtime environment, is also the easiest way to download the Cucumber.js test runner.
If you are going to use the command line mode, make sure the path to the parent folder of the Node.js executable file and the path to the
npmfolder are added to the
PATHvariable. This enables you to launch the Cucumber.js test runner and npm from any folder.
- Install and enable the NodeJS repository plugin as described in Installing, Updating and Uninstalling Repository Plugins and Enabling and Disabling Plugins.
- Install and enable the Cucumber.js and Gherkin plugins. The plugins are not bundled with PyCharm, but they can be installed from the JetBrains plugin repository as described in Installing, Updating and Uninstalling Repository Plugins and Enabling and Disabling Plugins. Once enabled, the plugins are available at the IDE level, that is, you can use them in all your PyCharm projects.
- Local installation in a specific project restricts the use of the test runner to this project.
- Global installation makes the test runner available at the PyCharm level so it can be used in any PyCharm project. Moreover, during installation the parent folder of the test runner is automatically added to the
PATHvariable, which enables you to launch the test runner from any folder.
- Because Cucumber.js is a test framework, which is of no need for those who are going to re-use your application, it is helpful to have it excluded from download for the future. This is done by marking the tool as a development dependency, which actually means adding the tool in the
devDependenciessection of the
- launch the embedded Terminal ( or by hovering your mouse pointer over in the lower left corner of PyCharm and choosing Terminal from the menu and type one of the following commands at the command line prompt:
npm install cucumberto install Cucumber.js in your project.
npm install -g cucumberto install Cucumber.js globally. The
-gkey makes the test runner run in the global mode. Because the installation is performed through NPM, the Cucumber.js test runner is installed in the
npmfolder. Make sure this parent folder is added to the
PATHvariable. This enables you to launch the test runner from any folder.
npm install --dev cucumberto install Cucumber.js as a development dependency. After installation, the test runner is added to the
devDependenciessection of the
You can also install the
cucumber package on the Node.js and NPM page of the Settings dialog box as described in Installing and Removing External Software Using Node Package Manager.
Creating a Cucumber.js run configuration
- Open the Run/Debug Configuration dialog box by doing one of the following:
- Click the Add button on the toolbar and select the Cucumber.js configuration type. The Run/Debug Configuration: Cucumber.js dialog box opens.
- In the Feature file or directory text box, specify the tests to run. Cucumber.js runs tests that are called features and are written in the Gherkin language. Each feature is described in a separate file with the extension
- In the Executable path text box, specify the location of the cucumber executable file,
.bat, or other depending on the operating system used. The location depends on the installation mode, see Installing the Cucumber.js test runner.
- Optionally, specify the command line arguments to be passed to the Cucumber.js executable file, such as
--tags TAG_EXPRESSION), or
--coffee. For details, see Cucumber's native built-in help available through the
- Apply the changes and close the dialog box.
- To launch the tests according to a run configuration, select the Cucumber.js run/debug configuration from the list on the main toolbar and click the Run button to the right of the list.
- The test server starts automatically without any steps from your side. View and analyze messages from the test server in the Run tool window.
- Monitor test execution in the Test Runner tab of the Run tool window as described in Monitoring and Managing Tests.