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How to run tests with Jest from the command line

Unit Testing: Jestcli, command, jest, run

Jest flags: --watch for Git-tracked changes, --watchAll for all files, --runInBand for serial debugging, --clearCache for errors, --findRelatedTests for specific files. Configure moduleNameMapper for path aliases. Debug with node --inspect-brk. Use jest.useFakeTimers() for timer tests.

Node.js Core

How to run a JavaScript file with Node.js

Node.js Corenode.js, run, script, terminal

Node.js command-line arguments with process.argv. Access script inputs starting at index 2 or use slice(2). Parse flags with libraries like yargs or commander.