@arrows/array/src/has_.test.ts

Functional tools for JS arrays

import { has_ } from "./index"

describe("Array flat", () => {
  it("returns true if the array has provided index", () => {
    const arr = [1, 2, 3, 4]
    const index = 2

    const result = has_(index, arr)
    const result2 = has_(index)(arr)
    const expected = true

    expect(result).toEqual(result2)
    expect(result).toEqual(expected)
  })

  it("returns false if the array does not have provided index", () => {
    const arr = [1, 2, 3, 4]
    const index = 10

    const result = has_(index, arr)
    const result2 = has_(index)(arr)
    const expected = false

    expect(result).toEqual(result2)
    expect(result).toEqual(expected)
  })
})