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Documentation Grafana k6 JavaScript API jslib k6-testing Non-Retrying Assertions toBeDefined()

toBeDefined()

The toBeDefined() method asserts that a value is defined, meaning it is not undefined.

Syntax

JavaScript Copy

expect(actual).toBeDefined();
expect(actual).not.toBeDefined();

Returns

Description

The toBeDefined() method checks if a value is defined (not undefined). It passes for all values except undefined, including null, false, 0, empty strings, and empty objects/arrays.

Usage

JavaScript Copy

import { expect } from 'https://jslib.k6.io/k6-testing/0.6.1/index.js';

export default function () {
  expect(null).toBeDefined();
  expect(false).toBeDefined();
  expect(0).toBeDefined();
  expect('').toBeDefined();
  expect([]).toBeDefined();
  expect({}).toBeDefined();
  expect(NaN).toBeDefined();
}