to have keys
- <object> to [not] [only] have keys <array>
- <object> to [not] [only] have keys <string+>
Asserts the presence of a list of keys.
expect({ a: 'a', b: 'b', c: 'c' }, 'to have keys', 'a', 'c');expect({ a: 'a', b: 'b', c: 'c' }, 'to have keys', ['a', 'c']);
Using the only
flag you can assert that the object only have the
specified keys.
expect({ a: 'a', b: 'b', c: 'c' }, 'to only have keys', ['a', 'c', 'b']);
In case of a failing expectation you get the following output:
expect({ a: 'a', b: 'b', c: 'c' }, 'to have keys', 'c', 'd');
expected { a: 'a', b: 'b', c: 'c' } to have keys 'c', 'd'
This assertion can be negated using the not
flag:
expect({ a: 'a', b: 'b', c: 'c' }, 'not to have keys', 'd', 'e');expect(Object.create({ a: 'a', b: 'b', c: 'c' }), 'not to have keys', 'a', 'b');
Using the only
flag you can assert that the object not only have the
specified keys.
expect({ a: 'a', b: 'b', c: 'c' }, 'to not only have keys', 'a', 'b');
In case of a failing expectation you get the following output:
expect({ a: 'a', b: 'b', c: 'c' }, 'to not only have keys', 'a', 'b', 'c');
expected { a: 'a', b: 'b', c: 'c' } to not only have keys 'a', 'b', 'c'