public void RuleSetUpdater_FindAllIncludesUnderRoot()
        {
            // Arrange
            const string slnRoot     = @"X:\SolutionDir\";
            string       projectRoot = Path.Combine(slnRoot, @"Project\");
            string       sonarRoot   = Path.Combine(slnRoot, @"Sonar\");
            string       commonRoot  = Path.Combine(slnRoot, @"Common\");

            const string sonarRs1FileName      = "Sonar1.ruleset";
            const string sonarRs2FileName      = "Sonar2.ruleset";
            const string projectRsBaseFileName = "ProjectBase.ruleset";
            const string commonRs1FileName     = "SolutionCommon1.ruleset";
            const string commonRs2FileName     = "SolutionCommon2.ruleset";

            var sonarRs1      = TestRuleSetHelper.CreateTestRuleSet(sonarRoot, sonarRs1FileName);
            var sonarRs2      = TestRuleSetHelper.CreateTestRuleSet(sonarRoot, sonarRs2FileName);
            var projectBaseRs = TestRuleSetHelper.CreateTestRuleSet(projectRoot, projectRsBaseFileName);
            var commonRs1     = TestRuleSetHelper.CreateTestRuleSet(commonRoot, commonRs1FileName);
            var commonRs2     = TestRuleSetHelper.CreateTestRuleSet(commonRoot, commonRs2FileName);

            var inputRuleSet = TestRuleSetHelper.CreateTestRuleSet(projectRoot, "test.ruleset");

            AddRuleSetInclusion(inputRuleSet, projectBaseRs, useRelativePath: true);
            AddRuleSetInclusion(inputRuleSet, commonRs1, useRelativePath: true);
            AddRuleSetInclusion(inputRuleSet, commonRs2, useRelativePath: false);
            var expected1 = AddRuleSetInclusion(inputRuleSet, sonarRs1, useRelativePath: true);
            var expected2 = AddRuleSetInclusion(inputRuleSet, sonarRs2, useRelativePath: false);

            // Act
            RuleSetInclude[] actual = RuleSetUpdater.FindAllIncludesUnderRoot(inputRuleSet, sonarRoot).ToArray();

            // Assert
            CollectionAssert.AreEquivalent(new[] { expected1, expected2 }, actual);
        }