.toBeEmpty()

Use .toBeEmpty when checking if a String '', Array [], Object {}, or Iterable is empty. Because toBeEmpty supports checking for emptiness of Iterables, you can use it to check whether a Map, or Set is empty, as well as checking that a generator yields no values.

test('passes when given an empty string', () => {
  expect('').toBeEmpty();
  expect('hello').not.toBeEmpty();
});

test('passes when given an empty array', () => {
  expect([]).toBeEmpty();
  expect(['hello']).not.toBeEmpty();
});

test('passes when given an empty object', () => {
  expect({}).toBeEmpty();
  expect({ hello: 'world' }).not.toBeEmpty();
});

Tests