[Blueprint] Fix blueprint assignment name validation regex (Azure#19888)

* Fix blueprint assignment name validation regex

* Update ChangeLog.md

Co-authored-by: Yabo Hu <yabhu@microsoft.com>

Author: PramodValavala-MSFT

src/Blueprint/Blueprint.Test/ScenarioTests/BlueprintAssignmentTests.cs

@@ -12,7 +12,9 @@
 // limitations under the License.
 // ----------------------------------------------------------------------------------
 
+using Microsoft.Azure.Commands.Blueprint.Common;
 using Microsoft.WindowsAzure.Commands.ScenarioTest;
+using System;
 using Xunit;
 
 namespace Microsoft.Azure.Commands.Blueprint.Test.ScenarioTests
@@ -58,5 +60,15 @@ public void TestRemoveBlueprintAssignment()
             TestRunner.RunTestScript("Test-RemoveBlueprintAssignment");
         }
 
+
+        [Fact]
+        [Trait(Category.AcceptanceType, Category.CheckIn)]
+        public void TestResourceNameValidation()
+        {
+            Assert.Null(Record.Exception(() => Utils.ValidateName("Valid-resourceId")));
+            Assert.Null(Record.Exception(() => Utils.ValidateName("60b96b66-0ead-4cfc-831c-801616145b9c")));
+            Assert.Null(Record.Exception(() => Utils.ValidateName("H_-e.l(1)o۳৭﹏dž")));
+            Assert.Throws<ArgumentException>(() => Utils.ValidateName("trailing."));
+        }
     }
 }

src/Blueprint/Blueprint/ChangeLog.md

@@ -18,6 +18,7 @@
         - Additional information about change #1
 -->
 ## Upcoming Release
+* Fixed blueprint assignment name validation
 
 ## Version 0.4.0
 * Fix custom delegating handler to only apply to Blueprint requests

src/Blueprint/Blueprint/Common/Utils.cs

@@ -57,7 +57,7 @@ public static string GetScopeForSubscription(string subscriptionId)
 
         public static void ValidateName(string name)
         {
-            var regex = @"^[0-9a-zA-Z_-]*$";
+            var regex = @"^[-\w\._\(\)]+(?<!\.)$";
 
             Match match = Regex.Match(name, regex, RegexOptions.CultureInvariant);