// 1
let viewModel = MockUpSampleViewModel()
viewModel.isOn.silentUpdate(value: false)
let sampleViewController = SampleViewController(viewModel: viewModel)

// When
// 2
_ = sampleViewController.view
viewModel.isOn.value = true
// 3
let expectation = self.expectation(description: "testSwitchOn")
DispatchQueue.main.asyncAfter(deadline: .now() + .milliseconds(500)) {
    expectation.fulfill()
}

// Then
//4
waitForExpectations(timeout: 1)

// 5
XCTAssert(sampleViewController.switch.isOn == true)