Restore SEBPatch

SafeExamBrowser.Core.UnitTests/Operations/CommunicationHostOperationTests.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 Moq;
+using SafeExamBrowser.Communication.Contracts;
+using SafeExamBrowser.Core.Contracts.OperationModel;
+using SafeExamBrowser.Core.Operations;
+using SafeExamBrowser.Logging.Contracts;
+
+namespace SafeExamBrowser.Core.UnitTests.Operations
+{
+	[TestClass]
+	public class CommunicationHostOperationTests
+	{
+		private Mock<ICommunicationHost> hostMock;
+		private Mock<ILogger> loggerMock;
+		private CommunicationHostOperation sut;
+
+		[TestInitialize]
+		public void Initialize()
+		{
+			hostMock = new Mock<ICommunicationHost>();
+			loggerMock = new Mock<ILogger>();
+
+			sut = new CommunicationHostOperation(hostMock.Object, loggerMock.Object);
+		}
+
+		[TestMethod]
+		public void MustRestartHostOnRepeat()
+		{
+			var order = 0;
+			var stop = 0;
+			var start = 0;
+
+			hostMock.Setup(h => h.Stop()).Callback(() => stop = ++order);
+			hostMock.Setup(h => h.Start()).Callback(() => start = ++order);
+
+			var result = sut.Repeat();
+
+			hostMock.Verify(h => h.Stop(), Times.Once);
+			hostMock.Verify(h => h.Start(), Times.Once);
+
+			Assert.AreEqual(stop, 1);
+			Assert.AreEqual(start, 2);
+			Assert.AreEqual(OperationResult.Success, result);
+		}
+
+		[TestMethod]
+		public void MustOnlyRestartHostOnRepeatIfNotRunning()
+		{
+			hostMock.SetupGet(h => h.IsRunning).Returns(true);
+
+			var result = sut.Repeat();
+
+			hostMock.Verify(h => h.Start(), Times.Never);
+			hostMock.Verify(h => h.Stop(), Times.Never);
+
+			Assert.AreEqual(OperationResult.Success, result);
+		}
+
+		[TestMethod]
+		public void MustStartHostOnPerform()
+		{
+			var result = sut.Perform();
+
+			hostMock.Verify(h => h.Start(), Times.Once);
+			hostMock.Verify(h => h.Stop(), Times.Never);
+
+			Assert.AreEqual(OperationResult.Success, result);
+		}
+
+		[TestMethod]
+		public void MustStopHostOnRevert()
+		{
+			sut.Revert();
+
+			hostMock.Verify(h => h.Stop(), Times.Once);
+			hostMock.Verify(h => h.Start(), Times.Never);
+		}
+
+		[TestMethod]
+		public void MustFireStatusChangedEvent()
+		{
+			var fired = 0;
+
+			sut.StatusChanged += (_) => fired++;
+
+			sut.Perform();
+			sut.Repeat();
+			sut.Revert();
+
+			Assert.AreEqual(3, fired);
+		}
+
+		[TestMethod]
+		public void MustNotFireActionRequiredEvent()
+		{
+			sut.ActionRequired += (_) => Assert.Fail();
+
+			sut.Perform();
+			sut.Repeat();
+			sut.Revert();
+		}
+	}
+}