First install jest-extended with the npm install --save-dev jest-extended
command and use the toBeEmpty
assertion as in the following example:
const { toBeEmpty } = require('jest-extended');
expect.extend({ toBeEmpty });
describe('setFulltextSearchTermsFilter', () => {
test('returns filter without $text when fulltextSearchTerms is empty', () => {
const fulltextSearchTerms = [];
const filter = {};
const searchInclude = 'any';
expect(searchUtils.setFulltextSearchTermsFilter(fulltextSearchTerms, filter, searchInclude)).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.
Project: codever
- File: search.utils.spec.js
Reference -
https://jest-extended.jestcommunity.dev/docs/matchers/tobeempty
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