Function assertInstanceOf

assertInstanceOf<T>(actual, expectedType, msg?): asserts actual is InstanceType<T>
Make an assertion that obj is an instance of type. If not then throw.
Type Parameters
- T extends (new (...args: any[]) => any)
  The expected type of the object.
Parameters
- actual: unknown
  The object to check.
- expectedType: T
  The expected class constructor.
- msg: string = ""
  The optional message to display if the assertion fails.
Returns asserts actual is InstanceType<T>
Example: Usage
```
import { assertInstanceOf } from "@std/assert";

assertInstanceOf(new Date(), Date); // Doesn't throw
assertInstanceOf(new Date(), Number); // Throws
```
- Defined in assert/instance_of.ts:28