Function toContainEqualMatcher

Ensures that value is an Array or Set and contains an item equal to the expected.

For objects, this method recursively checks equality of all fields, rather than comparing objects by reference as performed by expect(value).toContain(expected).

For primitive values, this method is equivalent to expect(value).toContain(expected).

Usage

const value = [
  { example: 1 },
  { another: 2 },
  { more: 3 },
];
expect(value).toContainEqual({ another: 2 });
expect(new Set(value)).toContainEqual({ another: 2 });
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