import { isPromise } from "./isPromise";

describe("isPromise tests", () => {
    it("when function is Promise should return true", () => {
        expect(
            isPromise({
                then: () => null,
            }),
        ).toBe(true);
    });
    it("when function is not Promise should return false", () => {
        expect(isPromise(null)).toBe(false);
        expect(isPromise({})).toBe(false);
        expect(isPromise({ then: "AnotherType" })).toBe(false);
    });
});