Run/Debug Configuration: Mocha
Before you start
Mocha-specific configuration settings
In this field, specify the Node.js interpreter to use. Choose one of the configured interpreters or click and configure a new one as described in Configuring a local Node.js interpreter. If you choose the
In this field, type the Node.js-specific command-line options to be passed to the Node.js executable file. See Node Parameters for details.
In this field, specify the working directory of the application. By default, the Working directory field shows the project root folder. To change this predefined setting, specify the path to the desired folder or choose a previously used folder from the list.
In this field, specify the environment variables for the Node.js executable file, if applicable. Click Browse to the right of the field and configure a list of variables in the Environment Variables dialog, that opens:
The definitions of variables are displayed in the Environment variables read-only field with semicolons as separators, for example:
In this field, specify the Mocha installation home /npm/node_modules/mocha. If you installed Mocha regularly through the Node Package Manager, JetBrains Rider detects the Mocha installation home itself. Alternatively, type the path to executable file manually, or click Browse and select the location in the dialog, that opens.
From this list, choose the interface according to which the tests in the test folder are written. JetBrains Rider will recognize only tests that comply with the chosen interface. If during test execution JetBrains Rider runs against a test of another interface, the test session will be canceled with an error. This means that all the tests in the specified test folder must be written according to the same interface and this interface must be chosen from the list.
Extra Mocha options
In this field, specify additional Mocha command-line options. For example, add a
As a result, any test in the current run configuration restarts automatically on changing the related source code, without clicking the Rerun button .
In this area, specify the tests to be executed. The available options are:
Docker container settings
This read-only field shows port and volume bindings. Click to open the command preview.
In this area, specify the commands and options to be passed to Docker Compose. Accept the default settings or click and specify custom ones, for example, custom Docker Compose flags, like
Check the Command Preview.
When you edit a run configuration (but not a run configuration template), you can specify the following options:
Specify a name for the run/debug configuration to quickly identify it when editing or running the configuration, for example, from the Run popup Alt+Shift+F10.
Allow parallel run
Select to allow running multiple instances of this run configuration in parallel.
By default, it is disabled, and when you start this configuration while another instance is still running, JetBrains Rider suggests to stop the running instance and start another one. This is helpful when a run/debug configuration consumes a lot of resources and there is no good reason to run multiple instances.
Store as project file
Save the file with the run configuration settings to share it with other team members. The default location is .idea/runConfigurations. However, if you do not want to share the .idea directory, you can save the configuration to any other directory within the project.
By default, it is disabled, and JetBrains Rider stores run configuration settings in .idea/workspace.xml.
The tree view of run/debug configurations has a toolbar that helps you manage configurations available in your solution as well as adjust default configurations templates.
Create a run/debug configuration.
Delete the selected run/debug configuration. Note that you cannot delete default configurations.
Create a copy of the selected run/debug configuration. Note that you create copies of default configurations.
The button is displayed only when you select a temporary configuration. Click this button to save a temporary configuration as permanent.
Move into new folder / Create new folder. You can group run/debug configurations by placing them into folders.
To create a folder, select the configurations within a category, click , and specify the folder name. If only a category is in focus, an empty folder is created.
Then, to move a configuration into a folder, between the folders or out of a folder, use drag or and buttons.
To remove grouping, select a folder and click .
Click this button to sort configurations in the alphabetical order.
In this area, you can specify tasks to be performed before starting the selected run/debug configuration. The tasks are performed in the order they appear in the list.
Click this icon to add one of the following available tasks:
Click this icon to remove the selected task from the list.
Click this icon to edit the selected task. Make the necessary changes in the dialog that opens.
Click these icons to move the selected task one line up or down in the list. The tasks are performed in the order that they appear in the list.
Show this page
Select this checkbox to show the run/debug configuration settings prior to actually starting the run/debug configuration.
Activate tool window
Otherwise, if the checkbox is cleared, the tool window is hidden. However, when the configuration is running, you can open the corresponding tool window for it yourself by pressing Alt+4 or Alt+5.