@nrwl/angular:cypress-component-configuration

Add a Cypress component testing configuration to an existing project. Cypress v10.7.0 or higher is required.

Can I use component testing?

Angular component testing with Nx requires Cypress version 10.7.0 and up.

You can migrate with to v10 via the migrate-to-cypress-10 generator.

This generator is for Cypress based component testing.

If you want to test components via Storybook with Cypress, then check out the storybook-configuration generator docs

This generator is designed to get your Angular project up and running with Cypress Component Testing.

nx g @nrwl/angular:cypress-component-configuration --project=my-cool-angular-project

Running this generator, adds the required files to the specified project with a preconfigured cypress.config.ts designed for Nx workspaces.

cypress.config.ts
import { defineConfig } from 'cypress';
import { nxComponentTestingPreset } from '@nrwl/angular/plugins/component-testing';

export default defineConfig({
  component: nxComponentTestingPreset(__filename),
});

Here is an example on how to add custom options to the configuration

cypress.config.ts
import { defineConfig } from 'cypress';
import { nxComponentTestingPreset } from '@nrwl/angular/plugins/component-testing';

export default defineConfig({
  component: {
    ...nxComponentTestingPreset(__filename),
    // extra options here
  },
});

Specifying a Build Target

Component testing requires a build target to correctly run the component test dev server. This option can be manually specified with --build-target=some-angular-app:build, but Nx will infer this usage from the project graph if one isn't provided.

For Angular projects, the build target needs to be using the @nrwl/angular:webpack-browser or @angular-devkit/build-angular:browser executor. The generator will throw an error if a build target can't be found and suggest passing one in manually.

Letting Nx infer the build target by default

nx g @nrwl/angular:cypress-component-configuration --project=my-cool-angular-project

Manually specifying the build target

nx g @nrwl/angular:cypress-component-configuration --project=my-cool-angular-project --build-target:some-angular-app:build --generate-tests

Build Target with Configuration

If you're wanting to use a build target with a specific configuration. i.e. my-app:build:production, then manually providing --build-target=my-app:build:production is the best way to do that.

Auto Generating Tests

You can optionally use the --generate-tests flag to generate a test file for each component in your project.

nx g @nrwl/angular:cypress-component-configuration --project=my-cool-angular-project --generate-tests

Running Component Tests

A new component-test target will be added to the specified project to run your component tests.

nx g component-test my-cool-angular-project

Here is an example of the project configuration that is generated. The --build-target option is added as the devServerTarget which can be changed as needed.

project.json
{
  "targets" {
    "component-test": {
      "executor": "@nrwl/cypress:cypress",
      "options": {
        "cypressConfig": "<path-to-project-root>/cypress.config.ts",
        "testingType": "component",
        "devServerTarget": "some-angular-app:build",
        "skipServe": true
      }
    }
  }
}

Nx also supports React component testing.

Usage

nx generate cypress-component-configuration ...

By default, Nx will search for cypress-component-configuration in the default collection provisioned in workspace.json.

You can specify the collection explicitly as follows:

nx g @nrwl/angular:cypress-component-configuration ...

Show what will be generated without writing to disk:

nx g cypress-component-configuration ... --dry-run

Options

project

Required

string

The name of the project to add cypress component testing configuration to

buildTarget

string

Pattern: ^[^:\\s]+:[^:\\s]+(:\\S+)?$

A build target used to configure Cypress component testing in the format of project:target[:configuration]. The build target should be an angular app. If not provided we will try to infer it from your projects usage.

generateTests

boolean

Default: false

Generate default component tests for existing components in the project

skipFormat

boolean

Default: false

Skip formatting files