substance/test/utils.test.js

Substance is a JavaScript library for web-based content editing. It provides building blocks for realizing custom text editors and web-based publishing system. It is developed to power our online editing platform [Substance](http://substance.io).

import { test } from 'substance-test'
import { flattenOften, isEqual } from 'substance'

test('utils: flattenOften should flatten multiple rounds', (t) => {
  const arr = [1, [2, 3, [4, 5]]]
  const result = flattenOften(arr, 2)
  t.deepEqual([1, 2, 3, 4, 5], result, 'array should be flattened.')
  t.end()
})

test('utils: flattenOften should stop at max', (t) => {
  const arr = [1, [2, 3, [4, 5]]]
  const result = flattenOften(arr, 1)
  t.deepEqual([1, 2, 3, [4, 5]], result, 'array should be flattened only once.')
  t.end()
})

test('utils: isEqual on primitives', (t) => {
  t.ok(isEqual(1, 1), '1 === 1')
  t.ok(isEqual('foo', 'foo'), '"foo" === "foo"')
  t.notOk(isEqual('foo', 'bar'), '"foo" !== "bar"')
  t.notOk(isEqual(null, undefined), 'null !== undefined')
  t.end()
})

test('utils: isEqual on arrays', (t) => {
  t.ok(isEqual([1, [2, 3, [4, 5]]], [1, [2, 3, [4, 5]]]), 'should do a deep array comparison')
  t.notOk(isEqual([1, [2, 3, [4, 5]]], [1, [2, 3, [4, 5, 6]]]), 'should detect inequality on deeper level')
  t.end()
})

test('utils: isEqual on objects', (t) => {
  t.ok(isEqual({ foo: 'foo', bar: { bla: 'bla', blupp: {} }, baz: [1, 2, 3] }, { foo: 'foo', bar: { bla: 'bla', blupp: {} }, baz: [1, 2, 3] }), 'should do a deep object comparison')
  t.notOk(isEqual({ foo: 'foo', bar: { bla: 'bla', blupp: {} }, baz: [1, 2, 3] }, { foo: 'foo', bar: { bla: 'bla', blupp: { a: 'a' } }, baz: [1, 2, 3] }), 'should detect inequality on deeper level')
  t.end()
})