Split out models, add some tests and fix some formatting.

RiotSwiftUI/Modules/Room/Composer/CreateActionList/Test/Unit/ComposerCreateActionListTests.swift

@@ -0,0 +1,41 @@
+//
+// Copyright 2022 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.
+//
+
+@testable import RiotSwiftUI
+import SwiftUI
+import XCTest
+
+class ComposerCreateActionListTests: XCTestCase {
+    var viewModel: ComposerCreateActionListViewModel!
+    var context: ComposerCreateActionListViewModel.Context!
+    
+    override func setUpWithError() throws {
+        viewModel = ComposerCreateActionListViewModel(initialViewState: ComposerCreateActionListViewState(actions: ComposerCreateAction.allCases))
+        context = viewModel.context
+    }
+    
+    func testSelection() throws {
+        let actionToSelect: ComposerCreateAction = .attachments
+        var result: ComposerCreateActionListViewModelResult?
+        viewModel.callback = { callbackResult in
+            result = callbackResult
+        }
+        
+        viewModel.context.send(viewAction: .selectAction(actionToSelect))
+
+        XCTAssertEqual(result, .done(actionToSelect))
+    }
+}