Hitta testmetoder via reflexion

TestRunner/MainWindow.xaml.cs

@@ -30,10 +30,7 @@ namespace TestRunner
 
         private void ButtonBase_OnClick(object sender, RoutedEventArgs e)
         {
-            var testClass = new TestingLib.TestThePaymentDate();
+            TestingLib.Assert.RunTests();
-            testClass.DateIs30DaysInFuture();
-            testClass.ReturnsMondayIfProposedIsSaturday();
-            testClass.ReturnsMondayIfProposedIsSunday();
 
         }
     }

TestingLib/Assert.cs

@@ -1,7 +1,10 @@
 using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
+using System.Net.Sockets;
+using System.Reflection;
 using System.Runtime.CompilerServices;
+using System.Linq;
 using System.Text;
 
 namespace TestingLib
@@ -32,5 +35,24 @@ namespace TestingLib
             testInfo.MethodName = methodName;
             TestResults.Add(testInfo);
         }
+
+        public static void RunTests()
+        {
+            foreach (MethodInfo method in GetTestMethods())
+            {
+                var instanceOfTestClass = Activator.CreateInstance(method.DeclaringType);
+                method.Invoke(instanceOfTestClass, null);
+            }
+        }
+        private static List<MethodInfo> GetTestMethods()
+        {
+            var q = from t in Assembly.GetExecutingAssembly().GetTypes()
+                from m in t.GetMethods()
+                from att in m.GetCustomAttributes(true)
+                where att.GetType() == typeof(CheckThisMethod)
+                select m;
+
+            return q.ToList();
+        }
     }
 }

TestingLib/CheckThisMethod.cs

@@ -0,0 +1,11 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace TestingLib
+{
+    [AttributeUsage(AttributeTargets.Method)]
+    public class CheckThisMethod : Attribute
+    {
+    }
+}

TestingLib/TestThePaymentDate.cs

@@ -7,6 +7,7 @@ namespace TestingLib
 {
     public class TestThePaymentDate
     {
+        [CheckThisMethod]
         public void DateIs30DaysInFuture()
         {
             var pd = new SUT.PaymentSystem.PaymentDate();
@@ -17,6 +18,7 @@ namespace TestingLib
             Assert.AreEqual(futureDate, sampleDate.AddDays(30), $"Expected date is not 30 days in the future.");
 
         }
+        [CheckThisMethod]
         public void ReturnsMondayIfProposedIsSunday()
         {
 
@@ -26,6 +28,7 @@ namespace TestingLib
             var futureDate = pd.CalculateFuturePaymentDate(sampleDate);
             Assert.AreEqual(futureDate.DayOfWeek, DayOfWeek.Monday, $"Expected date is not Monday.");
         }
+        [CheckThisMethod]
         public void ReturnsMondayIfProposedIsSaturday()
         {
             var pd = new SUT.PaymentSystem.PaymentDate();