[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [Assert](https://evolu.dev/docs/api-reference/common/Assert) › assertEqual

```ts
function assertEqual<Actual, Expected>(
  actual: Actual,
  expected: Expected,
  ...dataError: AssertEqualError<Actual | Expected>
): void;
```

Defined in: [packages/common/src/Assert.ts:143](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/common/src/Assert.ts#L143)

Asserts that two [Data](https://evolu.dev/docs/api-reference/common/Type/variables/Data) values are equal according to [eqData](https://evolu.dev/docs/api-reference/common/Eq/functions/eqData).

Use this for concise value checks in platform-independent examples. Use
[assert](https://evolu.dev/docs/api-reference/common/Assert/variables/assert) with a descriptive message for application invariants.

### Example

```ts

const actual = new Map([["roles", new Set(["admin", "author"])]]);
const expected = new Map([["roles", new Set(["author", "admin"])]]);

assertEqual(actual, expected);
```