helpers.js

import {getDocument, checkContainerType} from '../helpers'

test('returns global document if exists', () => {
  expect(getDocument()).toBe(document)
})

describe('query container validation throws when validation fails', () => {
  test('undefined as container', () => {
    expect(() =>
      checkContainerType(undefined),
    ).toThrowErrorMatchingInlineSnapshot(
      `"Expected container to be an Element, a Document or a DocumentFragment but got undefined."`,
    )
  })
  test('null as container', () => {
    expect(() => checkContainerType(null)).toThrowErrorMatchingInlineSnapshot(
      `"Expected container to be an Element, a Document or a DocumentFragment but got null."`,
    )
  })
  test('array as container', () => {
    expect(() => checkContainerType([])).toThrowErrorMatchingInlineSnapshot(
      `"Expected container to be an Element, a Document or a DocumentFragment but got Array."`,
    )
  })
  test('object as container', () => {
    expect(() => checkContainerType({})).toThrowErrorMatchingInlineSnapshot(
      `"Expected container to be an Element, a Document or a DocumentFragment but got Object."`,
    )
  })
})