deep-assert

deep-assert

Providing a better deep-equals assertion experience.

• Easily write object and array expectations, with any() and satisfies()
• Create your own custom assertions
• Short, but precise diffs, even for large nested objects
• Works with objects, arrays, dates, buffers, etc
• Zero dependencies

Installation

npm install deep-assert

Usage

Basic

import * as assert from "assert-deep"

assert.deepEquals(getUsers() , [
  {
    id: assert.any(),
    name: "John Smith",
    active: true
  },
  {
    id: assert.any(),
    name: "Jane Smith",
    active: false
  }
])

Custom assertions

import * as assert from "assert-deep"

const uuidRegex = /^[0-9a-fA-F]{8}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{4}\-[0-9a-fA-F]{12}$/
const assertUUID = assert.satisfies(value => typeof value === "string" && value.match(uuidRegex))

assert.deepEquals(getUsers() , [
  {
    id: assertUUID(),
    name: "John Smith",
    active: true
  },
  {
    id: assertUUID(),
    name: "Jane Smith",
    active: false
  }
])

License

MIT