iOS Dependecy Injection Swinject Ricardo respose

order-testing-example-2.swift

// use this in unit test target

class StubOrderValidator: OrderValidator {
    
    var stubResponse: Bool!
    
    func hasMinimumSpend(order: Order) -> Bool {
        return self.stubResponse
    }
}

class OrderViewModelTest {
    
    func testButtonEnabledWhenOrderOverMinimumSpend() {
        let stubValidator = StubOrderValidator()
        let viewModel = OrderViewModel(validator: stubValidator)
        stubValidator.stubResponse = true
        let isPayButtonEnabled = viewModel.isPayButtonEnabled
        assert(isPayButtonEnabled)
    }
    
    func testButtonDisabledWhenOrderUnderMinimumSpend() {
        let stubValidator = StubOrderValidator()
        let viewModel = OrderViewModel(validator: stubValidator)
        stubValidator.stubResponse = false
        let isPayButtonEnabled = viewModel.isPayButtonEnabled
        assert(isPayButtonEnabled == false)
    }
}