Bootstrap custom version of the app for UI tests

UITests/Sources/Application.swift

@@ -9,9 +9,23 @@
 import XCTest
 
 struct Application {
-    func launch() {
+    static func launch() -> XCUIApplication {
         let app = XCUIApplication()
         app.launchEnvironment = ["IS_RUNNING_UI_TESTS": "1"]
         app.launch()
+        return app
+    }
+}
+
+extension XCUIApplication {
+    func goToScreenWithIdentifier(_ identifier: String) {
+        let button = self.buttons[identifier]
+        let lastLabel = staticTexts["lastItem"]
+        
+        while !button.isHittable && !lastLabel.isHittable {
+            self.tables.firstMatch.swipeUp()
+        }
+        
+        button.tap()
     }
 }

UITests/Sources/ElementXUITests.swift

@@ -1,12 +0,0 @@
-//
-//  ElementXUITests.swift
-//  ElementXUITests
-//
-//  Created by Stefan Ceriu on 11.02.2022.
-//
-
-import XCTest
-
-class ElementXUITests: XCTestCase {
-    
-}

UITests/Sources/LoginScreenUITests.swift

@@ -15,3 +15,15 @@
 //
 
 import XCTest
+
+class LoginScreenUITests: XCTestCase {
+    func testInitialStateComponents() {
+        let app = Application.launch()
+        app.goToScreenWithIdentifier("Login screen")
+        
+        XCTAssert(app.staticTexts["Login"].exists)
+        XCTAssert(app.buttons["Login"].exists)
+        XCTAssert(app.textFields["Username"].exists)
+        XCTAssert(app.secureTextFields["Password"].exists)
+    }
+}