moy-fp/test/List/indexOf.test.js

A functional programming library.

import __ from '../../src/Function/__'
/**
 * a -> [a] -> Number
 */
import indexOf from '../../src/List/indexOf'

test('indexOf(not using __), not reference type, contains', () => {
  expect(
    indexOf(3)([1, 2, 3, 4])
  ).toBe(2)
})

test('indexOf(not using __), not reference type, not contains', () => {
  expect(
    indexOf(5)([1, 2, 3, 4])
  ).toBe(-1)
})

test('indexOf(not using __), reference type, contains', () => {
  expect(
    indexOf({a: 3})([{a: 1}, {a: 2}, {a: 3}, {a: 4}])
  ).toBe(2)
})

test('indexOf(not using __), reference type, not contains', () => {
  expect(
    indexOf({a: 5})([{a: 1}, {a: 2}, {a: 3}, {a: 4}])
  ).toBe(-1)
})

test('indexOf(using __), not reference type, contains', () => {
  expect(
    indexOf(__, [1, 2, 3, 4])(3)
  ).toBe(2)
})