LastSyncTime can be empty (Azure#21829)

* LastSyncTime can be empty

Author: christothes

sdk/tables/Azure.Data.Tables/src/Generated/Models/TableGeoReplicationInfo.Serialization.cs

@@ -0,0 +1,33 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+using System;
+using System.Text;
+using System.Xml.Linq;
+using Azure.Core;
+
+namespace Azure.Data.Tables.Models
+{
+    public partial class TableGeoReplicationInfo
+    {
+        internal static TableGeoReplicationInfo DeserializeTableGeoReplicationInfo(XElement element)
+        {
+            TableGeoReplicationStatus status = default;
+            DateTimeOffset lastSyncedOn = default;
+            if (element.Element("Status") is XElement statusElement)
+            {
+                status = new TableGeoReplicationStatus(statusElement.Value);
+            }
+            if (element.Element("LastSyncTime") is XElement lastSyncTimeElement)
+            {
+                // LastSyncTime can be empty (see https://docs.microsoft.com/en-us/rest/api/storageservices/get-table-service-stats#response-body)
+                lastSyncedOn = (lastSyncTimeElement.Value.Length == 0) switch
+                {
+                    true => DateTimeOffset.MinValue,
+                    false => lastSyncTimeElement.GetDateTimeOffsetValue("R")
+                };
+            }
+            return new TableGeoReplicationInfo(status, lastSyncedOn);
+        }
+    }
+}

sdk/tables/Azure.Data.Tables/src/TableGeoReplicationInfo.Serialization.cs

@@ -2,6 +2,7 @@
 // Licensed under the MIT License.
 
 using System;
+using System.Threading.Tasks;
 using Azure.Core.TestFramework;
 using Azure.Data.Tables.Sas;
 using NUnit.Framework;
@@ -11,19 +12,20 @@ namespace Azure.Data.Tables.Tests
     public class TableServiceClientTests : ClientTestBase
     {
         public TableServiceClientTests(bool isAsync) : base(isAsync)
-        {
-        }
+        { }
 
         /// <summary>
         /// The table account name.
         /// </summary>
         private readonly string _accountName = "someaccount";
+
         private const string Secret = "Kg==";
 
         /// <summary>
         /// The table endpoint.
         /// </summary>
         private readonly Uri _url = new Uri($"https://someaccount.table.core.windows.net");
+
         private readonly Uri _urlHttp = new Uri($"http://someaccount.table.core.windows.net");
 
         private TableServiceClient service_Instrumented { get; set; }
@@ -40,17 +42,35 @@ public void TestSetup()
         [Test]
         public void ConstructorValidatesArguments()
         {
-            Assert.That(() => new TableServiceClient(null, new TableSharedKeyCredential(_accountName, string.Empty)), Throws.InstanceOf<ArgumentNullException>(), "The constructor should validate the url.");
-
-            Assert.That(() => new TableServiceClient(_url, credential: default(TableSharedKeyCredential)), Throws.InstanceOf<ArgumentNullException>(), "The constructor should validate the TablesSharedKeyCredential.");
-
-            Assert.That(() => new TableServiceClient(_urlHttp, new AzureSasCredential("sig")), Throws.InstanceOf<ArgumentException>(), "The constructor should validate the Uri is https when using a SAS token.");
-
-            Assert.That(() => new TableServiceClient(_url, default(AzureSasCredential)), Throws.InstanceOf<ArgumentNullException>(), "The constructor should not accept a null credential");
-
-            Assert.That(() => new TableServiceClient(_url, new TableSharedKeyCredential(_accountName, string.Empty)), Throws.Nothing, "The constructor should accept valid arguments.");
-
-            Assert.That(() => new TableServiceClient(_urlHttp, new TableSharedKeyCredential(_accountName, string.Empty)), Throws.Nothing, "The constructor should accept an http url.");
+            Assert.That(
+                () => new TableServiceClient(null, new TableSharedKeyCredential(_accountName, string.Empty)),
+                Throws.InstanceOf<ArgumentNullException>(),
+                "The constructor should validate the url.");
+
+            Assert.That(
+                () => new TableServiceClient(_url, credential: default(TableSharedKeyCredential)),
+                Throws.InstanceOf<ArgumentNullException>(),
+                "The constructor should validate the TablesSharedKeyCredential.");
+
+            Assert.That(
+                () => new TableServiceClient(_urlHttp, new AzureSasCredential("sig")),
+                Throws.InstanceOf<ArgumentException>(),
+                "The constructor should validate the Uri is https when using a SAS token.");
+
+            Assert.That(
+                () => new TableServiceClient(_url, default(AzureSasCredential)),
+                Throws.InstanceOf<ArgumentNullException>(),
+                "The constructor should not accept a null credential");
+
+            Assert.That(
+                () => new TableServiceClient(_url, new TableSharedKeyCredential(_accountName, string.Empty)),
+                Throws.Nothing,
+                "The constructor should accept valid arguments.");
+
+            Assert.That(
+                () => new TableServiceClient(_urlHttp, new TableSharedKeyCredential(_accountName, string.Empty)),
+                Throws.Nothing,
+                "The constructor should accept an http url.");
         }
 
         /// <summary>
@@ -111,5 +131,19 @@ public void GenerateSasUri()
 
             Assert.AreEqual("?" + expectedSas, actualSas.Query);
         }
+
+        [Test]
+        public async Task GetStatisticsHandlesEmptyLAstUpdatedTime(
+            [Values("Tue, 23 Mar 2021 18:29:21 GMT", "")]
+            string date)
+        {
+            var response = new MockResponse(200);
+            response.SetContent(
+                $"<?xml version=\"1.0\" encoding=\"utf-8\"?><StorageServiceStats><GeoReplication><Status>live</Status><LastSyncTime>{date}</LastSyncTime></GeoReplication></StorageServiceStats>");
+            var mockTransport = new MockTransport(response);
+            var service = InstrumentClient(new TableServiceClient(_url, new AzureSasCredential("sig"), new TableClientOptions { Transport = mockTransport }));
+
+            await service.GetStatisticsAsync();
+        }
     }
 }