Adds negative test of Enum.HasFlag (#131)

Author: SandorDobos

Tests/NFUnitTestEnum/UnitTestEnumTests.cs

@@ -397,6 +397,12 @@ public void EnumFlags05_Test()
             Debug.WriteLine("check Enum.HasFlag");
             TestClassEnumFlags05.TestMethod();
         }
+        [TestMethod]
+        public void EnumFlags06_Test()
+        {
+            Debug.WriteLine("check Enum.HasFlag throws exception");
+            TestClassEnumFlags06.TestMethod();
+        }
 
         //Compiled Test Cases 
         public class Enum_TestClass_enum01
@@ -2572,6 +2578,17 @@ enum TestClassEnumFlags
             Third = 0x0004,
             Fourth = 0x0008,
         }
+
+        [Flags]
+        enum TestClassAnotherEnumFlags
+        {
+            Zero = 0x0000,
+            First = 0x0001,
+            Second = 0x0002,
+            Third = 0x0004,
+            Fourth = 0x0008,
+        }
+
         public class TestClassEnumFlags01
         {
             public static bool TestMethod()
@@ -2629,5 +2646,26 @@ public static void TestMethod()
                 Assert.True(e2.HasFlag(TestClassEnumFlags.Third));
             }
         }
+
+        public class TestClassEnumFlags06
+        {
+
+
+            public static void TestMethod()
+            {
+                var e1 = TestClassEnumFlags.First;
+                var e2 = TestClassAnotherEnumFlags.First;
+
+                try
+                {
+                    e1.HasFlag(e2);
+                    Assert.False(true, "No exception thrown!");
+                }
+                catch (ArgumentException)
+                {
+                    // no op
+                }
+            }
+        }
     }
 }