npm test (alias for
npm run test, also
npm t works)
this will start Jest, which will scan the project directories to find test files
in our case it will find no files (there are none)
➜ jest-101 npm test No tests found, exiting with code 1
note: files are searched by specific regexes note: node_modules is skipped by default
create an empty file named test.js in the project root
> email@example.com test /Users/jaga/coding/jest-101 > jest FAIL ./test.js ● Test suite failed to run Your test suite must contain at least one test. at node_modules/@jest/core/build/TestScheduler.js:242:24 Test Suites: 1 failed, 1 total Tests: 0 total Snapshots: 0 total Time: 1.354s Ran all test suites. npm ERR! Test failed. See above for more details.
this time Jest finds the file test.js but the command fails with the error
Your test suite must contain at least one test.
Author: Jaga Santagostino