.containOnly()

Asserts that an array contains exactly the specified elements, regardless of order. The array must have the same elements as the expected set, no more and no less.

Examples

expect([1, 2, 3]).to.containOnly([3, 2, 1]);
expect([1, 2, 3]).to.containOnly([1, 2, 3]);
expect(["a", "b"]).to.containOnly(["b", "a"]);

With Negation

expect([1, 2, 3]).to.not.containOnly([1, 2]);  // has extra element
expect([1, 2]).to.not.containOnly([1, 2, 3]);  // missing element

What Failures Look Like

expect([1,2,3]).to.containOnly([1,2]);

ASSERTION FAILED: [1, 2, 3] should contain only [1, 2].
OPERATION: containOnly

  ACTUAL: <int[]> [1, 2, 3]
EXPECTED: <int[]> to contain only [1, 2]

See Also

• contain - Check if array contains a single element