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Jest · Pipe

globalSetup

Jest runs JavaScript tests. A basic test calls a function and uses expect(...).toBe(...) to check the exact result.

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Syntax

test(name, callback)
expect(value).toBe(expected)
{ "scripts": { "test": "jest" } }

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  • expect
  • toBe
  • test
  • jest.config.js
  • defineConfig
  • globalSetup
  • globalTeardown
  • --config

Source: Getting Started · Jest. Checked 2026-11-03.