import { toBeNull } from "https://deno.land/x/unitest@v1.0.0-beta.82/matcher/to_be_null.ts";
Use .toBeNull when checking a value is null
import { expect, test } from "https://deno.land/x/unitest@$VERSION/mod.ts";
test("passes when value is null", () => {
expect(null).toBeNull();
expect(undefined).not.toBeNull();
});