@codejedi365/jest-serial-runner
v2.0.1
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Extending the Jest default runner to run tests serially by default
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jest-serial-runner
Simple wrapper over the default Jest runner that forces serial execution of test files. This is equivalent to running with --runInBand
flag by default.
Why? Sometimes you have limited/restricted resources on the test machine (like in a docker container) and running the default jest-runner
always runs in parallel unless specified otherwise. Integration tests are another scenario where running concurrent instances causes issues so using this runner ensures only 1 test runs at a time.
Installation
npm install @codejedi365/jest-serial-runner --save-dev
Usage
Option 1: Specify the runner in your Jest
config
/* jest.config.json */
{
// ...
"runner": "@codejedi365/jest-serial-runner"
// ...
}
Option 2: To specify the runner for a subset of files such as for integration tests.
/* jest.config.js */
module.exports = {
// ...
projects: [
{
// Uses the jest default runner for specification testing
displayName: "UNIT",
testMatch: ["<rootDir>/src/**/__tests__/*.spec.ts"]
},
{
// Uses the serial runner instead for integration test files
displayName: "INTEGRATION",
runner: "@codejedi365/jest-serial-runner",
testMatch: ["<rootDir>/tests/**/*.integration-test.ts"]
}
]
}
Contributors
PR's & Issue contributions welcome! Please adhere to contributing guidelines or your submission will be closed or delayed.
Acknowledgements
Origin: gabrieli/jest-serial-runner
Contributors