Restore SEBPatch

SafeExamBrowser.Core.UnitTests/Operations/DelegateOperationTests.cs

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+/*
+ * Copyright (c) 2024 ETH Zürich, IT Services
+ * 
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using SafeExamBrowser.Core.Contracts.OperationModel;
+using SafeExamBrowser.Core.Operations;
+
+namespace SafeExamBrowser.Core.UnitTests.Operations
+{
+	[TestClass]
+	public class DelegateOperationTests
+	{
+		[TestMethod]
+		public void MustExecutePerformAction()
+		{
+			var performed = false;
+			void perform() => performed = true;
+			var sut = new DelegateOperation(perform);
+
+			sut.Perform();
+
+			Assert.IsTrue(performed);
+		}
+
+		[TestMethod]
+		public void MustExecuteRepeatAction()
+		{
+			var repeated = false;
+			void repeat() => repeated = true;
+			var sut = new DelegateOperation(() => { }, repeat);
+
+			sut.Repeat();
+
+			Assert.IsTrue(repeated);
+		}
+
+		[TestMethod]
+		public void MustExecuteRevertAction()
+		{
+			var reverted = false;
+			void revert() => reverted = true;
+			var sut = new DelegateOperation(() => { }, revert: revert);
+
+			sut.Revert();
+
+			Assert.IsTrue(reverted);
+		}
+
+		[TestMethod]
+		public void MustNotFailIfActionsAreNull()
+		{
+			var sut = new DelegateOperation(null, null, null);
+
+			var perform = sut.Perform();
+			var repeat = sut.Repeat();
+			var revert = sut.Revert();
+
+			Assert.AreEqual(OperationResult.Success, perform);
+			Assert.AreEqual(OperationResult.Success, repeat);
+			Assert.AreEqual(OperationResult.Success, revert);
+		}
+
+		[TestMethod]
+		public void MustNotFireEvents()
+		{
+			var sut = new DelegateOperation(default, default, default);
+
+			sut.ActionRequired += (_) => Assert.Fail();
+			sut.StatusChanged += (_) => Assert.Fail();
+
+			sut.Perform();
+		}
+	}
+}