SnapshotTesting-Test-LoginViewController-MultipleDevices

SnapshotTesting-Test-LoginViewController-MultipleDevices.swift

import XCTest
import SnapshotTesting
@testable import SampleApp

class LoginViewControllerSnapshotTests: XCTestCase {
    
    func test_loginViewControllerDefaultState() {
        let viewController = UINavigationController(rootViewController: LoginViewController2())
        verifyViewController(viewController, named: "Default")
    }
    
    private func verifyViewController(_ viewController: UIViewController, named: String) {
        let devices: [String: ViewImageConfig] = ["iPhoneX": .iPhoneX,
                                                  "iPhone8": .iPhone8, 
                                                  "iPhoneSe": .iPhoneSe]
        
        let results = devices.map { device in
            verifySnapshot(matching: viewController,
                           as: .image(on: device.value),
                           named: "\(named)-\(device.key)",
                           testName: "LoginViewController")
        }
        
        results.forEach { XCTAssertNil($0) }
    }
    
}