Restore SEBPatch

SafeExamBrowser.Browser.UnitTests/Filters/RequestFilterTests.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.Browser.Contracts.Filters;
+using SafeExamBrowser.Browser.Filters;
+using SafeExamBrowser.Settings.Browser.Filter;
+
+namespace SafeExamBrowser.Browser.UnitTests.Filters
+{
+	[TestClass]
+	public class RequestFilterTests
+	{
+		private RequestFilter sut;
+
+		[TestInitialize]
+		public void Initialize()
+		{
+			sut = new RequestFilter();
+		}
+
+		[TestMethod]
+		public void MustProcessBlockRulesFirst()
+		{
+			var allow = new Mock<IRule>();
+			var block = new Mock<IRule>();
+
+			allow.SetupGet(r => r.Result).Returns(FilterResult.Allow);
+			block.SetupGet(r => r.Result).Returns(FilterResult.Block);
+			block.Setup(r => r.IsMatch(It.IsAny<Request>())).Returns(true);
+
+			sut.Load(allow.Object);
+			sut.Load(block.Object);
+
+			var result = sut.Process(new Request());
+
+			allow.Verify(r => r.IsMatch(It.IsAny<Request>()), Times.Never);
+			block.Verify(r => r.IsMatch(It.IsAny<Request>()), Times.Once);
+
+			Assert.AreEqual(FilterResult.Block, result);
+		}
+
+		[TestMethod]
+		public void MustProcessAllowRulesSecond()
+		{
+			var allow = new Mock<IRule>();
+			var block = new Mock<IRule>();
+
+			allow.SetupGet(r => r.Result).Returns(FilterResult.Allow);
+			allow.Setup(r => r.IsMatch(It.IsAny<Request>())).Returns(true);
+			block.SetupGet(r => r.Result).Returns(FilterResult.Block);
+
+			sut.Load(allow.Object);
+			sut.Load(block.Object);
+
+			var result = sut.Process(new Request());
+
+			allow.Verify(r => r.IsMatch(It.IsAny<Request>()), Times.Once);
+			block.Verify(r => r.IsMatch(It.IsAny<Request>()), Times.Once);
+
+			Assert.AreEqual(FilterResult.Allow, result);
+		}
+
+		[TestMethod]
+		public void MustReturnDefaultWithoutMatch()
+		{
+			var allow = new Mock<IRule>();
+			var block = new Mock<IRule>();
+
+			allow.SetupGet(r => r.Result).Returns(FilterResult.Allow);
+			block.SetupGet(r => r.Result).Returns(FilterResult.Block);
+
+			sut.Default = (FilterResult) (-1);
+			sut.Load(allow.Object);
+			sut.Load(block.Object);
+
+			var result = sut.Process(new Request());
+
+			allow.Verify(r => r.IsMatch(It.IsAny<Request>()), Times.Once);
+			block.Verify(r => r.IsMatch(It.IsAny<Request>()), Times.Once);
+
+			Assert.AreEqual((FilterResult) (-1), result);
+		}
+
+		[TestMethod]
+		public void MustReturnDefaultWithoutRules()
+		{
+			sut.Default = FilterResult.Allow;
+			var result = sut.Process(new Request());
+			Assert.AreEqual(FilterResult.Allow, result);
+
+			sut.Default = FilterResult.Block;
+			result = sut.Process(new Request());
+			Assert.AreEqual(FilterResult.Block, result);
+		}
+
+		[TestMethod]
+		[ExpectedException(typeof(NotImplementedException))]
+		public void MustNotAllowUnsupportedResult()
+		{
+			var rule = new Mock<IRule>();
+
+			rule.SetupGet(r => r.Result).Returns((FilterResult) (-1));
+			sut.Load(rule.Object);
+		}
+	}
+}