Cypress Parallel Save
Reduce up to 40% your Cypress suite execution time parallelizing the test run on the same machine.
cypress-parallel
Reduce up to 40% your Cypress suite execution time parallelizing the test run on the same machine.
| cypress | cypress-parallel |
|---|---|
 |
 |
Run your Cypress tests in parallel (locally)
How it works
🔍 - Search for existing Cypress tests
📄 - Read (if exists) a weight file
⚖️ - Split spec files into different threads
⚙️ - For each thread it runs the Cypress command you've passed as argument
📈 - Wait for all threads to finish and collects the result in a single report
How to use
Install
npm i cypress-parallel -D
or
yarn add cypress-parallel -D
Add a new script
In your package.json add a new script:
"scripts" :{
...
"cy:run": "cypress run", // It can be any cypress command with any argument
"cy:parallel" : "cypress-parallel -s cy:run -t 2 -d '<your-cypress-specs-folder>' -a '\"<your-cypress-cmd-args>\"'"
...
}
With Arguments
Sample:
-a '\"--config baseUrl=http://localhost:3000\"'
Launch the new script
npm run cy:parallel
or
Run with npx (no package installation needed)
npx cy:parallel -s cy:run -t 2 -d '<your-cypress-specs-folder>' -a '"<your-cypress-cmd-args>"'
Passing Specs
cypress-parallel -s cy:run -t 2 -a '\"<your-cypress-cmd-args>\"' --spec path/to/spec1.spec.js path/to/spec2.spec.js
Scripts options
| Option | Alias | Description | Type |
|---|---|---|---|
| --help | Show help | ||
| --version | Show version number | ||
| --script | -s | Your npm Cypress command | string |
| --args | -a | Your npm Cypress command arguments | string |
| --threads | -t | Number of threads | number |
| --specsDir | -d | Cypress specs directory | string |
| --spec | Cypress spec file paths | string | |
| --weightsJson | -w | Parallel weights json file | string |
| --reporter | -r | Reporter to pass to Cypress. | string |
| --reporterOptions | -o | Reporter options | string |
| --reporterModulePath | -n | Specify the reporter module path | string |
| --bail | -b | Exit on first failing thread | string |
| --verbose | -v | Some additional logging | string |
| --strictMode | -m | Add stricter checks after running the tests | boolean |
NB: If you use cypress-cucumber-preprocesor, please disable the strictMode to avoid possible errors:
"scripts" :{
...
"cy:parallel" : "cypress-parallel -s cy:run -t 4 -m false"
...
}
NB: If your cypress-multi-reporters module is not found on the same level as your Cypress suite (e.g. in a mono-repo) then you can specify the module directory for Cypress to search within.
"scripts" :{
...
"cy:parallel" : "cypress-parallel -s cy:run -t 4 -n .../../../node_modules/cypress-multi-reporters"
...
}
Env variables
CYPRESS_THREAD
You can get the current thread index by reading the CYPRESS_THREAD variable.
const threadIndex = process.env.CYPRESS_THREAD;
// return 1, 2, 3, 4, ...
Contributors
Looking for contributors.
License
This project is licensed under the MIT license. See LICENSE.
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