Restore SEBPatch

SafeExamBrowser.Applications.UnitTests/ApplicationFactoryTests.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 System;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using Moq;
+using SafeExamBrowser.Applications.Contracts;
+using SafeExamBrowser.Logging.Contracts;
+using SafeExamBrowser.Monitoring.Contracts.Applications;
+using SafeExamBrowser.Settings.Applications;
+using SafeExamBrowser.SystemComponents.Contracts.Registry;
+using SafeExamBrowser.WindowsApi.Contracts;
+
+namespace SafeExamBrowser.Applications.UnitTests
+{
+	[TestClass]
+	public class ApplicationFactoryTests
+	{
+		private Mock<IApplicationMonitor> applicationMonitor;
+		private Mock<IModuleLogger> logger;
+		private Mock<INativeMethods> nativeMethods;
+		private Mock<IProcessFactory> processFactory;
+		private Mock<IRegistry> registry;
+
+		private ApplicationFactory sut;
+
+		[TestInitialize]
+		public void Initialize()
+		{
+			applicationMonitor = new Mock<IApplicationMonitor>();
+			logger = new Mock<IModuleLogger>();
+			nativeMethods = new Mock<INativeMethods>();
+			processFactory = new Mock<IProcessFactory>();
+			registry = new Mock<IRegistry>();
+
+			sut = new ApplicationFactory(applicationMonitor.Object, logger.Object, nativeMethods.Object, processFactory.Object, registry.Object);
+		}
+
+		[TestMethod]
+		public void MustCorrectlyCreateApplication()
+		{
+			var settings = new WhitelistApplication
+			{
+				DisplayName = "Windows Command Prompt",
+				ExecutableName = "cmd.exe",
+			};
+
+			var result = sut.TryCreate(settings, out var application);
+
+			Assert.AreEqual(FactoryResult.Success, result);
+			Assert.IsNotNull(application);
+			Assert.IsInstanceOfType<ExternalApplication>(application);
+		}
+
+		[TestMethod]
+		public void MustCorrectlyReadPathFromRegistry()
+		{
+			object o = @"C:\Some\Registry\Path";
+			var settings = new WhitelistApplication
+			{
+				DisplayName = "Windows Command Prompt",
+				ExecutableName = "cmd.exe",
+				ExecutablePath = @"C:\Some\Path"
+			};
+
+			registry.Setup(r => r.TryRead(It.Is<string>(s => s.Contains(RegistryValue.MachineHive.AppPaths_Key)), It.Is<string>(s => s == "Path"), out o)).Returns(true);
+
+			var result = sut.TryCreate(settings, out var application);
+
+			registry.Verify(r => r.TryRead(It.Is<string>(s => s.Contains(RegistryValue.MachineHive.AppPaths_Key)), It.Is<string>(s => s == "Path"), out o), Times.Once);
+
+			Assert.AreEqual(FactoryResult.Success, result);
+			Assert.IsNotNull(application);
+			Assert.IsInstanceOfType<ExternalApplication>(application);
+		}
+
+		[TestMethod]
+		public void MustIndicateIfApplicationNotFound()
+		{
+			var settings = new WhitelistApplication
+			{
+				ExecutableName = "some_random_application_which_does_not_exist_on_a_normal_system.exe",
+				ExecutablePath = "Some/Path/Which/Does/Not/Exist"
+			};
+
+			var result = sut.TryCreate(settings, out var application);
+
+			Assert.AreEqual(FactoryResult.NotFound, result);
+			Assert.IsNull(application);
+		}
+
+		[TestMethod]
+		public void MustFailGracefullyWhenPathIsInvalid()
+		{
+			var settings = new WhitelistApplication
+			{
+				ExecutableName = "asdfg(/ç)&=%\"fsdg..exe..",
+				ExecutablePath = "[]#°§¬#°¢@tu03450'w89tz!$£äöüèé:"
+			};
+
+			var result = sut.TryCreate(settings, out _);
+
+			logger.Verify(l => l.Error(It.IsAny<string>(), It.IsAny<Exception>()), Times.AtLeastOnce);
+
+			Assert.AreEqual(FactoryResult.NotFound, result);
+		}
+
+		[TestMethod]
+		public void MustFailGracefullyAndIndicateThatErrorOccurred()
+		{
+			var o = default(object);
+			var settings = new WhitelistApplication();
+
+			registry.Setup(r => r.TryRead(It.IsAny<string>(), It.IsAny<string>(), out o)).Throws<Exception>();
+
+			var result = sut.TryCreate(settings, out var application);
+
+			Assert.AreEqual(FactoryResult.Error, result);
+		}
+	}
+}