Start implementing FTUE splash screens.

Present splash screens from AuthenticationViewController

RiotSwiftUI/Modules/Onboarding/SplashScreen/Test/UI/OnboardingSplashScreenUITests.swift

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+//
+// Copyright 2021 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import XCTest
+import RiotSwiftUI
+
+@available(iOS 14.0, *)
+class OnboardingSplashScreenUITests: MockScreenTest {
+
+    override class var screenType: MockScreenState.Type {
+        return MockOnboardingSplashScreenScreenState.self
+    }
+
+    override class func createTest() -> MockScreenTest {
+        return OnboardingSplashScreenUITests(selector: #selector(verifyOnboardingSplashScreenScreen))
+    }
+
+    func verifyOnboardingSplashScreenScreen() throws {
+        guard let screenState = screenState as? MockOnboardingSplashScreenScreenState else { fatalError("no screen") }
+        switch screenState {
+        case .presence(let presence):
+            verifyOnboardingSplashScreenPresence(presence: presence)
+        case .longDisplayName(let name):
+            verifyOnboardingSplashScreenLongName(name: name)
+        }
+    }
+
+    func verifyOnboardingSplashScreenPresence(presence: OnboardingSplashScreenPresence) {
+        let presenceText = app.staticTexts["presenceText"]
+        XCTAssert(presenceText.exists)
+        XCTAssertEqual(presenceText.label, presence.title)
+    }
+
+    func verifyOnboardingSplashScreenLongName(name: String) {
+        let displayNameText = app.staticTexts["displayNameText"]
+        XCTAssert(displayNameText.exists)
+        XCTAssertEqual(displayNameText.label, name)
+    }
+
+}