Fix issue #491

src/Microsoft.Restier.Core/Submit/ChangeSetItem.cs

@@ -352,8 +352,19 @@ private static Expression ApplyPredicate(
             // Expression value = itemValue != null
             //     ? LinqParameterContainer.Parameterize(itemValue.GetType(), itemValue)
             //     : Expression.Constant(value: null);
-            var constant = Expression.Constant(itemValue, property.Type);
-            BinaryExpression equal = Expression.Equal(property, constant);
+            Expression left = property;
+            Expression right = Expression.Constant(itemValue, property.Type);
+            if (property.Type == typeof(byte[]))
+            {
+                left = Expression.Call(typeof(BitConverter), "ToString", null, new Expression[] { property });
+                right = Expression.Call(
+                    typeof(BitConverter),
+                    "ToString",
+                    null,
+                    new Expression[] { Expression.Constant(itemValue, property.Type) });
+            }
+
+            var equal = Expression.Equal(left, right);
             return where == null ? equal : Expression.AndAlso(where, equal);
         }
     }

test/ODataEndToEnd/Microsoft.OData.Service.Sample.Tests/TrippinE2EEtagTestCases.cs

@@ -346,7 +346,7 @@ public void IfNoneMatchCRUDTest()
             Assert.Equal(200, statusCode);
             Assert.NotEqual(oldEtag, etag);
 
-            // Delete the Entity with If-None-Match matches, should return 412            
+            // Delete the Entity with If-None-Match matches, should return 412
             // If this is not removed, client will auto add If-Match header
             descriptor = this.TestClientContext.GetEntityDescriptor(flight);
             descriptor.ETag = null;
@@ -392,5 +392,78 @@ public void IfNoneMatchCRUDTest()
             }
             Assert.Equal(404, statusCode);
         }
+
+        [Fact]
+        public void ByteArrayIfMatchTest()
+        {
+            this.TestClientContext.MergeOption = MergeOption.OverwriteChanges;
+            var airline = new Airline()
+            {
+                AirlineCode = "TT",
+                Name = "Test Airlines"
+            };
+
+            this.TestClientContext.AddToAirlines(airline);
+            this.TestClientContext.SaveChanges();
+
+            string etag = null;
+            int statusCode = -1;
+            EventHandler<ReceivingResponseEventArgs> statusCodeHandler = (sender, eventArgs) =>
+            {
+                etag = eventArgs.ResponseMessage.GetHeader("ETag");
+                statusCode = eventArgs.ResponseMessage.StatusCode;
+            };
+
+            this.TestClientContext.ReceivingResponse += statusCodeHandler;
+
+            // Retrieve the matched etag
+            airline =
+                this.TestClientContext.Airlines.ByKey(new Dictionary<string, object>()
+                {
+                    {"AirlineCode", airline.AirlineCode}
+                }).GetValue();
+            var matchEtag = etag;
+
+            // Retrieve a none match etag
+            var anotherAirline =
+                this.TestClientContext.Airlines.ByKey(new Dictionary<string, object>() {{"AirlineCode", "AA"}})
+                    .GetValue();
+            var nonMatchEtag = etag;
+
+            // Delete the Entity with If-Match does not match, should return 412
+            EventHandler<SendingRequest2EventArgs> sendRequestEvent = (sender, eventArgs) =>
+            {
+                eventArgs.RequestMessage.SetHeader("If-Match", nonMatchEtag);
+            };
+
+            this.TestClientContext.SendingRequest2 += sendRequestEvent;
+            this.TestClientContext.DeleteObject(airline);
+            Assert.Throws<DataServiceRequestException>(() => this.TestClientContext.SaveChanges());
+            Assert.Equal(412, statusCode);
+
+            // Delete the Entity with If-Match matches, should return 204
+            this.TestClientContext.SendingRequest2 -= sendRequestEvent;
+            sendRequestEvent = (sender, eventArgs) =>
+            {
+                eventArgs.RequestMessage.SetHeader("If-Match", matchEtag);
+            };
+
+            this.TestClientContext.SendingRequest2 += sendRequestEvent;
+            this.TestClientContext.DeleteObject(airline);
+            this.TestClientContext.SaveChanges();
+            Assert.Equal(204, statusCode);
+
+            // Query the flight again and entity does not exist.
+            this.TestClientContext.SendingRequest2 -= sendRequestEvent;
+            Assert.Throws<DataServiceQueryException>(() =>
+                airline =
+                    this.TestClientContext.Airlines.ByKey(new Dictionary<string, object>()
+                    {
+                        {"AirlineCode", airline.AirlineCode}
+                    }).GetValue()
+                );
+
+            Assert.Equal(404, statusCode);
+        }
     }
-}
+}