Skip to content

Latest commit

 

History

History
79 lines (63 loc) · 1.61 KB

to-contain.md

File metadata and controls

79 lines (63 loc) · 1.61 KB
Raw

Asserts an array (or array-like object) contains one or more items.

expect([0, 1, 2], 'to contain', 1);
expect([{ name: 'John Doe' }, { name: 'Jane Doe' }], 'to contain', {
  name: 'Jane Doe',
});
expect([0, 1, 2], 'to contain', 0, 2);

In case of a failing expectation you get the following output:

expect([{ name: 'John Doe' }, { name: 'Jane Doe' }], 'to contain', {
  name: 'Jonnie Doe',
});
expected [ { name: 'John Doe' }, { name: 'Jane Doe' } ]
to contain { name: 'Jonnie Doe' }

This assertion can be negated using the not flag:

expect([{ name: 'John Doe' }, { name: 'Jane Doe' }], 'not to contain', {
  name: 'Jonnie Doe',
});

In case of a failing expectation you get the following output:

expect([{ name: 'John Doe' }, { name: 'Jane Doe' }], 'not to contain', {
  name: 'Jane Doe',
});
expected [ { name: 'John Doe' }, { name: 'Jane Doe' } ]
not to contain { name: 'Jane Doe' }

[
  { name: 'John Doe' },
  { name: 'Jane Doe' } // should be removed
]

You can use the only flag to indicate that you want no other items to be in the subject.

expect(
  [{ name: 'John Doe' }, { name: 'Jane Doe' }],
  'to only contain',
  { name: 'Jane Doe' },
  { name: 'John Doe' }
);

In case there are more items than that in your subject, you will get the following output:

expect([{ name: 'Jane Doe' }, { name: 'John Doe' }], 'to only contain', {
  name: 'Jane Doe',
});
expected [ { name: 'Jane Doe' }, { name: 'John Doe' } ]
to only contain { name: 'Jane Doe' }

[
  { name: 'Jane Doe' },
  { name: 'John Doe' } // should be removed
]