public void OnUserGrouping()
        {
            // Create mockup for user summaries with differing user id.
            var mockupSummaries = new List <InstallLogUserSummary>();

            // Laptop is chosen here as default rule allows 1 license to install 2 laptops.
            var  computerType    = ComputerType.Laptop;
            uint numberOfLaptops = 1;
            uint reptition       = 100;

            for (uint i = 1; i <= reptition; i++)
            {
                // Create mockup summary with static computer type, static count, and userID = i.
                var mockup = new Dictionary <ComputerType, uint>();
                mockup.Add(computerType, numberOfLaptops);
                var mockupSummary = new InstallLogUserSummary(mockup, i);

                mockupSummaries.Add(mockupSummary);
            }

            var classUnderTest = LicenseCalculatorFactory.CreateFromUserSummaries(mockupSummaries);

            // Ensure result is equal to expected output.
            // Expected output is equal to repetition, as each user can't share license with other users.
            uint output         = classUnderTest.GetMinLicenseRequired();
            uint expectedOutput = reptition;

            Assert.AreEqual(output, expectedOutput);
        }