106 lines
4.4 KiB
Markdown
106 lines
4.4 KiB
Markdown
{% callout type="caution" title="Can I use component testing?" %}
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Angular component testing with Nx requires **Cypress version 10.7.0** and up.
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You can migrate with to v10 via the [migrate-to-cypress-10 generator](/packages/cypress/generators/migrate-to-cypress-10).
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This generator is for Cypress based component testing.
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If you want to test components via Storybook with Cypress, then check out the [storybook-configuration generator docs](/nx-api/angular/generators/storybook-configuration). However, this functionality is deprecated, and will be removed on Nx version 18.
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{% /callout %}
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This generator is designed to get your Angular project up and running with Cypress Component Testing.
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```shell
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nx g @nx/angular:cypress-component-configuration --project=my-cool-angular-project
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```
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Running this generator, adds the required files to the specified project with a preconfigured `cypress.config.ts` designed for Nx workspaces.
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```ts {% fileName="cypress.config.ts" %}
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import { defineConfig } from 'cypress';
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import { nxComponentTestingPreset } from '@nx/angular/plugins/component-testing';
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export default defineConfig({
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component: nxComponentTestingPreset(__filename),
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});
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```
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Here is an example on how to add custom options to the configuration
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```ts {% fileName="cypress.config.ts" %}
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import { defineConfig } from 'cypress';
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import { nxComponentTestingPreset } from '@nx/angular/plugins/component-testing';
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export default defineConfig({
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component: {
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...nxComponentTestingPreset(__filename),
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// extra options here
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},
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});
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```
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## Specifying a Build Target
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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](/concepts/mental-model#the-project-graph) if one isn't provided.
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For Angular projects, the build target needs to be using the `@nx/angular:webpack-browser` or
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`@angular-devkit/build-angular:browser` executor.
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The generator will throw an error if a build target can't be found and suggest passing one in manually.
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Letting Nx infer the build target by default
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```shell
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nx g @nx/angular:cypress-component-configuration --project=my-cool-angular-project
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```
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Manually specifying the build target
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```shell
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nx g @nx/angular:cypress-component-configuration --project=my-cool-angular-project --build-target:some-angular-app:build --generate-tests
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```
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{% callout type="note" title="Build Target with Configuration" %}
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If you're wanting to use a build target with a specific configuration. i.e. `my-app:build:production`,
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then manually providing `--build-target=my-app:build:production` is the best way to do that.
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{% /callout %}
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## Auto Generating Tests
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You can optionally use the `--generate-tests` flag to generate a test file for each component in your project.
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```shell
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nx g @nx/angular:cypress-component-configuration --project=my-cool-angular-project --generate-tests
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```
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## Running Component Tests
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A new `component-test` target will be added to the specified project to run your component tests.
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```shell
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nx g component-test my-cool-angular-project
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```
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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.
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```json {% fileName="project.json" %}
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{
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"targets" {
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"component-test": {
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"executor": "@nx/cypress:cypress",
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"options": {
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"cypressConfig": "<path-to-project-root>/cypress.config.ts",
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"testingType": "component",
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"devServerTarget": "some-angular-app:build",
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"skipServe": true
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}
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}
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}
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}
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```
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## What is bundled
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When the project being tested is a dependent of the specified `--build-target`, then **assets, scripts, and styles** are applied to the component being tested. You can determine if the project is dependent by using the [project graph](/core-features/explore-graph). If there is no link between the two projects, then the **assets, scripts, and styles** won't be included in the build; therefore, they will not be applied to the component. To have a link between projects, you can import from the project being tested into the specified `--build-target` project, or set the `--build-target` project to [implicitly depend](/reference/project-configuration#implicitdependencies) on the project being tested.
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Nx also supports [React component testing](/packages/angular/generators/cypress-component-configuration).
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