'afterEach' cannot be used inside 'it', 'afterEach' may only be used inside 'context' or 'describe' about quick HOT 2 OPEN

class MyService {
    var completion: (() -> Void)?

    func perform(completion: @escaping () -> Void) {
        self.completion = completion
        DispatchQueue.main.asyncAfter(deadline: .now() + 0.1, execute: completion)
    }
}

class MyObject {
    var didPerform = false
    let service = MyService()

    func perform(completion: @escaping () -> Void) {
        service.perform {
            self.didPerform = true
            completion()
        }
    }
}

final class MockTest: QuickSpec {
    override func spec() {
        describe("mock test") {
            var sut: MyObject!

            beforeEach {
                sut = MyObject()
            }

            afterEach { [weak sut] in
                expect(sut).to(beNil())
            }

            it("performs") {
                sut.perform {}
                expect(sut.didPerform).toEventually(beTrue())
            }
        }
    }
}