[SalesForce] sfdx-lwc-jest’ is not recognized as an internal or external command

I am trying to run LWC Jest test, While i'm run this command:"sfdx force:lightning:lwc:test:run"

I am getting this error: 'sfdx-lwc-jest' is not recognized as an internal or external command,'.

Error body is:

C:\Testing\Auto59\test>sfdx force:lightning:lwc:test:run
'C:\Testing\Auto59\test\node_modules\@salesforce\sfdx-lwc-jest\bin\sfdx-lwc-jest' is not recognized as an internal or external command,
operable program or batch file.
Test run complete. Exited with status code: 1

Reference Link: https://github.com/salesforce/sfdx-plugin-lwc-test

Best Answer

This feature isn't installed by default.

You can add it via:

sfdx force:lightning:lwc:test:setup

Or:

npm install
npm install @salesforce/sfdx-lwc-jest --save-dev

(The first npm install is not a typo; this is used to install all other named packages in package.json and their dependencies.)

Once installed, the command should then work as documented.

You can read more about this in the documentation.

Related Solutions

[SalesForce] LightningComponentBundle “Not available for deploy for this API version” error

Looks like I have found already a culprit here. It is very important to check sourceApiVersion property of project.json configuration.

Looks like this value was 44.0 in my project. Probably because I have created it before updating the salesforce-cli tool. Then I updated the CLI and even reinstalled it but the project version has not been changed.

{
  "packageDirectories": [
    {
      "path": "force-app",
      "default": true
    }
  ],
  "namespace": "",
  "sfdcLoginUrl": "https://login.salesforce.com",
  "sourceApiVersion": /*"44.0"=>*/"45.0"
}

Now after updating this configuration settings, it started working successfully.

[SalesForce] Help needed: Writing a Jest Test for an LWC with a slot

I don't know much about Jest but I can spot a potential problem.

You're creating a test element (let testElement = createElement('c-my-wizard', { is: MyWizard });) and later attempting to modify its DOM.

LWC only lets you manipulate an element's DOM if you decorate it with a lwc:dom="manual" in it's definition. The error gives you that hint.

The component you created gets rendered as <c-my-wizard></c-my-wizard> but it should get rendered as <c-my-wizard lwc:dom="manual"></c-my-wizard>

My lack of knowledge in Jest will preclude me from fixing your syntax, but if you can add that directive you'll be good to go

Best Answer

Related Solutions

[SalesForce] LightningComponentBundle “Not available for deploy for this API version” error

[SalesForce] Help needed: Writing a Jest Test for an LWC with a slot

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