.toThrowErrorMatchingSnapshot()

Use .toThrowErrorMatchingSnapshot to test that a function throws an error matching the most recent snapshot when it is called. For example, let's say you have a drinkFlavor function that throws whenever the flavor is 'octopus', and is coded like this:

function drinkFlavor(flavor) {
  if (flavor == 'octopus') {
    throw new DisgustingFlavorError('yuck, octopus flavor');
  }
  // Do some other stuff
}

The test for this function will look this way:

test('throws on octopus', () => {
  function drinkOctopus() {
    drinkFlavor('octopus');
  }
  expect(drinkOctopus).toThrowErrorMatchingSnapshot();
});

And it will generate the following snapshot:

exports[`drinking flavors throws on octopus 1`] = `"yuck, octopus flavor"`;

Check out React Tree Snapshot Testing for more information on snapshot testing.