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@std/expect@0.215.0

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It is unknown whether this package works with Browsers
It is unknown whether this package works with Deno
It is unknown whether this package works with Node.js
It is unknown whether this package works with Cloudflare Workers
It is unknown whether this package works with Bun
•JSR Score47%•
Downloads2/wk
•
Published3 years ago (0.215.0)

This module provides jest compatible expect assertion functionality.

Currently this module supports the following matchers:

  • toBe
  • toEqual
  • toStrictEqual
  • toMatch
  • toMatchObject
  • toBeDefined
  • toBeUndefined
  • toBeNull
  • toBeNaN
  • toBeTruthy
  • toBeFalsy
  • toContain
  • toContainEqual
  • toHaveLength
  • toBeGreaterThan
  • toBeGreaterThanOrEqual
  • toBeLessThan
  • toBeLessThanOrEqual
  • toBeCloseTo
  • toBeInstanceOf
  • toThrow
  • toHaveProperty
  • toHaveLength

Also this module supports the following mock related matchers:

  • toHaveBeenCalled
  • toHaveBeenCalledTimes
  • toHaveBeenCalledWith
  • toHaveBeenLastCalledWith
  • toHaveBeenNthCalledWith
  • toHaveReturned
  • toHaveReturnedTimes
  • toHaveReturnedWith
  • toHaveLastReturnedWith
  • toHaveNthReturnedWith

The following matchers are not supported yet:

  • toMatchSnapShot
  • toMatchInlineSnapShot
  • toThrowErrorMatchingSnapShot
  • toThrowErrorMatchingInlineSnapShot

The following asymmetric matchers are not supported yet:

  • expect.anything
  • expect.any
  • expect.arrayContaining
  • expect.not.arrayContaining
  • expect.closedTo
  • expect.objectContaining
  • expect.not.objectContaining
  • expect.stringContaining
  • expect.not.stringContaining
  • expect.stringMatching
  • expect.not.stringMatching

The following uitlities are not supported yet:

  • expect.assertions
  • expect.hasAssertions
  • expect.addEqualityTester
  • expect.addSnapshotSerializer
  • expect.extend

This module is largely inspired by x/expect module by Allain Lalonde.

Examples

Example 1

import { expect } from "@std/expect";

const x = 6 * 7;
expect(x).toEqual(42);
expect(x).not.toEqual(0);

await expect(Promise.resolve(x)).resolves.toEqual(42);

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Add Package

deno add jsr:@std/expect

Import symbol

import * as expect from "@std/expect";
or

Import directly with a jsr specifier

import * as expect from "jsr:@std/expect";