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cypress/cli/README.md
2021-10-07 09:31:16 -05:00

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# CLI
The CLI is used to build the [cypress npm module](https://www.npmjs.com/package/cypress) to be run within a terminal.
**The CLI has the following responsibilities:**
- Allow users to print CLI commands
- Allow users to install the Cypress executable
- Allow users to print their current Cypress version
- Allow users to run Cypress tests from the terminal
- Allow users to open Cypress in the interactive Test Runner.
- Allow users to verify that Cypress is installed correctly and executable
- Allow users to manages the Cypress binary cache
- Allow users to pass in options that change way tests are ran or recorded (browsers used, specfiles ran, grouping, parallelization)
## Building
See `scripts/build.js`. Note that the built npm package will include [NPM_README.md](NPM_README.md) as its public README file.
## Testing
### Automated
From the repo's root, you can run unit tests with:
```bash
yarn test-unit --scope cypress
yarn test-watch --scope cypress
yarn test-debug --scope cypress
```
### Updating snapshots
Prepend `SNAPSHOT_UPDATE=1` to any test command. See [`snap-shot-it` instructions](https://github.com/bahmutov/snap-shot-it#advanced-use) for more info.
```bash
SNAPSHOT_UPDATE=1 yarn test-unit --scope cypress
```
#### Type Linting
When testing with `dtslint`, you may need to remove existing typescript installations before running the type linter (for instance, on OS X, you might `rm -rf ~/.dts/typescript-installs`) in order to reproduce issues with new versions of typescript (i.e., `@next`).
### Manual
To build and test an NPM package:
- `yarn`
- `yarn build`
This creates `build` folder.
- `cd build; yarn pack`
This creates an archive, usually named `cypress-v<version>.tgz`. You can install this archive from other projects, but because there is no corresponding binary yet (probably), skip binary download. For example from inside `cypress-example-kitchensink` folder
```shell
yarn add ~/{your-dirs}/cypress/cli/build/cypress-3.3.1.tgz --ignore-scripts
```
Which installs the `tgz` file we have just built from folder `Users/jane-lane/{your-dirs}/cypress/cli/build`.
#### Module API
The module API can be tested locally using something like:
```typescript
/* @ts-ignore */
import cypress from '../../cli/lib/cypress'
const run = cypress.run as (options?: Partial<CypressCommandLine.CypressRunOptions>) => Promise<CypressCommandLine.CypressRunResult | CypressCommandLine.CypressFailedRunResult>
run({
spec: './cypress/component/advanced/framer-motion/Motion.spec.tsx',
testingType: 'component',
/* @ts-ignore */
dev: true,
}).then(results => {
console.log(results)
})
```
Note that the `dev` flag is required for local testing, as otherwise the command will fail with a binary error.