Fix BlobBaseClient.SetNameFields - trim slashes according to ClientCo… (Azure#31886)

* fix BlobBaseClient.SetNameFields - trim slashes according to ClientConfiguration

* Move new uTest From BBClient to BUriBuilder

Author: slab-msft

sdk/storage/Azure.Storage.Blobs/src/BlobBaseClient.cs

@@ -567,7 +567,7 @@ private void SetNameFieldsIfNull()
         {
             if (_name == null || _containerName == null || _accountName == null)
             {
-                var builder = new BlobUriBuilder(Uri);
+                var builder = new BlobUriBuilder(Uri, ClientConfiguration.TrimBlobNameSlashes);
                 _name = builder.BlobName;
                 _containerName = builder.BlobContainerName;
                 _accountName = builder.AccountName;

sdk/storage/Azure.Storage.Blobs/tests/BlobUriBuilderTests.cs

@@ -974,5 +974,30 @@ public void BlobUriBuilder_SasInvalidStartExpiryTimeFormat()
                 Assert.IsTrue(e.Message.Contains("was not recognized as a valid DateTime."));
             }
         }
+
+        [RecordedTest]
+        public void BlobBaseClient_SetNameFields_TrimBlobNameSlashes([Values("blobname", "/blobname", "//blobname", "vdir//blobname", "/vdir//blobname")] string blobName, [Values(true, false)] bool trimBlobNameSlashes)
+        {
+            // arrange
+            var accountName = "account";
+            var containerName = "container";
+            var uriPrefix = $"https://{accountName}.blob.core.windows.net/{containerName}/";
+            var options = new BlobClientOptions() { TrimBlobNameSlashes = trimBlobNameSlashes };
+
+            // act
+            var blobBase = new BlobBaseClient(new Uri(string.Concat(uriPrefix, blobName)), options);
+
+            // verify
+            if (trimBlobNameSlashes)
+            {
+                Assert.AreEqual(blobName.Trim('/'), blobBase.Name);
+            }
+            else
+            {
+                Assert.AreEqual(blobName, blobBase.Name);
+            }
+            Assert.AreEqual(containerName, blobBase.BlobContainerName);
+            Assert.AreEqual(accountName, blobBase.AccountName);
+        }
     }
 }