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Records

.toBeRecordOf(expected)​

Also available as an asymmetric matcher, expect.recordOf(expected).

Use .toBeRecordOf to assert that a value is an object where each value matches the expected value, using deep equality.

Optionally, you can pass two arguments and the first one will be matched against keys.

.toBeStrictRecordOf(expected) and expect.strictRecordOf(expected) are also available to use strict deep equality.

const record = { a: 1, b: 2, c: 3 };

it("is a record of the expected values", () => {
  expect(record).toBeRecordOf(expect.any(Number));
  expect(record).toBeRecordOf(expect.any(String), expect.any(Number));
});

Open browser consoleTests

caution

Keys and values are retrieved using Object.entries, so only string (non-symbol) enumerable keys are checked.