test(notification-outbox): fold notification enum tests into EnumTests convention

tests/ScadaLink.Commons.Tests/Types/EnumTests.cs

@@ -12,6 +12,8 @@ public class EnumTests
     [InlineData(typeof(AlarmLevel), new[] { "None", "Low", "LowLow", "High", "HighHigh" })]
     [InlineData(typeof(AlarmTriggerType), new[] { "ValueMatch", "RangeViolation", "RateOfChange", "HiLo", "Expression" })]
     [InlineData(typeof(ConnectionHealth), new[] { "Connected", "Disconnected", "Connecting", "Error" })]
+    [InlineData(typeof(NotificationStatus), new[] { "Pending", "Retrying", "Delivered", "Parked", "Discarded" })]
+    [InlineData(typeof(NotificationType), new[] { "Email" })]
     public void Enum_ShouldHaveExpectedValues(Type enumType, string[] expectedNames)
     {
         var actualNames = Enum.GetNames(enumType);
@@ -26,6 +28,8 @@ public class EnumTests
     [InlineData(typeof(AlarmLevel))]
     [InlineData(typeof(AlarmTriggerType))]
     [InlineData(typeof(ConnectionHealth))]
+    [InlineData(typeof(NotificationStatus))]
+    [InlineData(typeof(NotificationType))]
     public void Enum_ShouldBeSingularNamed(Type enumType)
     {
         // Singular names should not end with 's' (except 'Status' which is singular)

tests/ScadaLink.Commons.Tests/Types/NotificationEnumTests.cs

@@ -1,21 +0,0 @@
-using ScadaLink.Commons.Types.Enums;
-
-namespace ScadaLink.Commons.Tests.Types;
-
-public class NotificationEnumTests
-{
-    [Fact]
-    public void NotificationStatus_HasExactlyTheCentralStates()
-    {
-        var names = Enum.GetNames<NotificationStatus>();
-        Assert.Equal(
-            new[] { "Pending", "Retrying", "Delivered", "Parked", "Discarded" },
-            names);
-    }
-
-    [Fact]
-    public void NotificationType_HasEmail()
-    {
-        Assert.True(Enum.IsDefined(NotificationType.Email));
-    }
-}