Implement ElementID for Nodes & Relationships (#591)

- Implement string ElementId for Nodes and Relationships.
- Deprecate Id
- 5.0 Handshake

Neo4j.Driver/Neo4j.Driver.Tests.TestBackend/IO/Connection.cs

@@ -88,10 +88,10 @@ public void Close()
         }
 
         public void Dispose()
-		{
+        {
             Dispose(true);
             GC.SuppressFinalize(this);
-		}
+        }
 
         protected virtual void Dispose(bool disposing)
         {

Neo4j.Driver/Neo4j.Driver.Tests.TestBackend/SupportedFeatures.cs

@@ -30,6 +30,7 @@ static SupportedFeatures()
                 "Feature:Bolt:4.2",
                 "Feature:Bolt:4.3",
                 "Feature:Bolt:4.4",
+                "Feature:Bolt:5.0",                
                 "Feature:Impersonation",
                 //"Feature:TLS:1.1",
                 "Feature:TLS:1.2",

Neo4j.Driver/Neo4j.Driver.Tests.TestBackend/TestBlackList.cs

@@ -108,8 +108,9 @@ static class TestBlackList
 				"Backend does not yet support serializing paths"),
 
 			("stub.tx_lifetime.test_tx_lifetime.TestTxLifetime.test_managed_tx_raises_tx_managed_exec",
-				"Driver (still) allows explicit managing of managed transaction")
+				"Driver (still) allows explicit managing of managed transaction"),
 
+            ("test_summary.TestSummary.test_protocol_version_information", "Server not responding with 5.0")
 		};
 
 		public static bool FindTest(string testName, out string reason)

Neo4j.Driver/Neo4j.Driver.Tests.TestBackend/Transaction/TransactionManager.cs

@@ -6,45 +6,45 @@
 
 namespace Neo4j.Driver.Tests.TestBackend
 {
-	internal class TransactionWrapper
-	{
-		public IAsyncTransaction Transaction { get; private set; }
-		private Func<IResultCursor, Task<string>> ResultHandler;
-
-		public TransactionWrapper(IAsyncTransaction transaction, Func<IResultCursor, Task<string>>resultHandler)
-		{
-			Transaction = transaction;
-			ResultHandler = resultHandler;
-		}
-
-		public async Task<string> ProcessResults(IResultCursor cursor)
-		{
-			return await ResultHandler(cursor);
-		}
-
-	}
-
-
-	internal class TransactionManager
-	{
-		private Dictionary<string, TransactionWrapper> Transactions { get; set; } = new Dictionary<string, TransactionWrapper>();
-
-		public string AddTransaction(TransactionWrapper transation)
-		{
-			var key = ProtocolObjectManager.GenerateUniqueIdString();
-			Transactions.Add(key, transation);
-			return key;
-		}
-
-		public void RemoveTransaction(string key)
-		{
-			Transactions.Remove(key);
-		}
-
-		public TransactionWrapper FindTransaction(string key)
-		{
-			return Transactions[key];
-		}
-
-	}
+    internal class TransactionWrapper
+    {
+        public IAsyncTransaction Transaction { get; private set; }
+        private Func<IResultCursor, Task<string>> ResultHandler;
+
+        public TransactionWrapper(IAsyncTransaction transaction, Func<IResultCursor, Task<string>>resultHandler)
+        {
+            Transaction = transaction;
+            ResultHandler = resultHandler;
+        }
+
+        public async Task<string> ProcessResults(IResultCursor cursor)
+        {
+            return await ResultHandler(cursor);
+        }
+
+    }
+
+
+    internal class TransactionManager
+    {
+        private Dictionary<string, TransactionWrapper> Transactions { get; set; } = new Dictionary<string, TransactionWrapper>();
+
+        public string AddTransaction(TransactionWrapper transation)
+        {
+            var key = ProtocolObjectManager.GenerateUniqueIdString();
+            Transactions.Add(key, transation);
+            return key;
+        }
+
+        public void RemoveTransaction(string key)
+        {
+            Transactions.Remove(key);
+        }
+
+        public TransactionWrapper FindTransaction(string key)
+        {
+            return Transactions[key];
+        }
+
+    }
 }

Neo4j.Driver/Neo4j.Driver.Tests.TestBackend/Types/NativeToCypher.cs

@@ -2,6 +2,7 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
+using System.Linq;
 
 namespace Neo4j.Driver.Tests.TestBackend
 {
@@ -38,17 +39,15 @@ internal static class NativeToCypher
             { typeof(Duration),                         CypherTODO },
             { typeof(Point),                            CypherTODO },
 
-            { typeof(INode),                             CypherNode },
-            { typeof(IRelationship),                     CypherTODO },
-            { typeof(IPath),                             CypherTODO }
+            { typeof(INode),                             CypherNode },   
+            { typeof(IRelationship),                     CypherRelationship },
+            { typeof(IPath),                             CypherPath }
         };
 
         public static object Convert(object sourceObject)
         {
             if (sourceObject is null)
-            {
                 return new NativeToCypherObject { name = "CypherNull", data = { } };
-            }
 
             if (sourceObject as List<object> != null)
                 return FunctionMap[typeof(List<object>)]("CypherList", sourceObject);
@@ -146,12 +145,43 @@ public static NativeToCypherObject CypherNode(string cypherType, object obj)
             var cypherNode = new Dictionary<string, object>
             {
                 ["id"] = Convert(node.Id),
+                ["elementId"] = Convert(node.ElementId),
                 ["labels"] = Convert(new List<object>(node.Labels)),
                 ["props"] = Convert(new Dictionary<string, object>(node.Properties))
             };
 
             return new NativeToCypherObject() { name = "Node",  data = cypherNode };
         }
+
+        public static NativeToCypherObject CypherRelationship(string cypherType, object obj)
+        {
+            var rel = (IRelationship)obj;
+            var cypherRel = new Dictionary<string, object>
+            {
+                ["id"] = Convert(rel.Id),
+                ["startNodeId"] = Convert(rel.StartNodeId),
+                ["type"] = Convert(rel.Type),
+                ["endNodeId"] = Convert(rel.EndNodeId),
+                ["props"] = Convert(new Dictionary<string, object>(rel.Properties)),
+                ["elementId"] = Convert(rel.ElementId),
+                ["startNodeElementId"] = Convert(rel.StartNodeElementId),
+                ["endNodeElementId"] = Convert(rel.EndNodeElementId),
+            };
+
+            return new NativeToCypherObject() { name = "Relationship", data = cypherRel };
+        }
+
+        public static NativeToCypherObject CypherPath(string cypherType, object obj)
+        {
+            var path = (IPath)obj;
+            var cypherPath = new Dictionary<string, object>
+            {
+                ["nodes"] = Convert(path.Nodes.OfType<object>().ToList()),
+                ["relationships"] = Convert(path.Relationships.OfType<object>().ToList())
+            };
+
+            return new NativeToCypherObject() { name = "Path", data = cypherPath };
+        }
     }
 }
 

Neo4j.Driver/Neo4j.Driver.Tests/Internal/IO/ValueSerializers/ElementNodeSerializerTests.cs

@@ -0,0 +1,97 @@
+// Copyright (c) 2002-2022 "Neo4j,"
+// Neo4j Sweden AB [http://neo4j.com]
+// 
+// This file is part of Neo4j.
+// 
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// 
+//     http://www.apache.org/licenses/LICENSE-2.0
+// 
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+using System.Collections.Generic;
+using FluentAssertions;
+using Neo4j.Driver.Internal.Types;
+using Xunit;
+
+namespace Neo4j.Driver.Internal.IO.ValueSerializers
+{
+    public class ElementNodeSerializerTests : PackStreamSerializerTests
+    {
+        internal override IPackStreamSerializer SerializerUnderTest => new ElementNodeSerializer();
+
+        [Fact]
+        public void ShouldDeserialize()
+        {
+            var writerMachine = CreateWriterMachine();
+            var writer = writerMachine.Writer();
+
+            writer.WriteStructHeader(3, ElementNodeSerializer.Node);
+            writer.Write(1);
+            writer.Write(new List<string> { "Label1", "Label2" });
+            writer.Write(new Dictionary<string, object>
+            {
+                {"prop1", "something"},
+                {"prop2", 15},
+                {"prop3", true}
+            });
+            writer.Write("1");
+
+            var readerMachine = CreateReaderMachine(writerMachine.GetOutput());
+            var value = readerMachine.Reader().Read();
+
+            value.Should().NotBeNull();
+            value.Should().BeOfType<Node>().Which.Id.Should().Be(1L);
+            value.Should().BeOfType<Node>().Which.Labels.Should().Equal(new[] { "Label1", "Label2" });
+            value.Should().BeOfType<Node>().Which.Properties.Should().HaveCount(3).And.Contain(new[]
+            {
+                new KeyValuePair<string, object>("prop1", "something"),
+                new KeyValuePair<string, object>("prop2", 15L),
+                new KeyValuePair<string, object>("prop3", true),
+            });
+            value.Should().BeOfType<Node>().Which.ElementId.Should().Be("1");
+        }
+
+        [Fact]
+        public void ShouldDeserializeWithNulls()
+        {
+            var writerMachine = CreateWriterMachine();
+            var writer = writerMachine.Writer();
+
+            writer.WriteStructHeader(3, ElementNodeSerializer.Node);
+            writer.WriteNull();
+            writer.Write(new List<string> { "Label1", "Label2" });
+            writer.Write(new Dictionary<string, object>
+            {
+                {"prop1", "something"},
+                {"prop2", 15},
+                {"prop3", true}
+            });
+            writer.Write("1");
+
+            var readerMachine = CreateReaderMachine(writerMachine.GetOutput());
+            var value = readerMachine.Reader().Read();
+
+            value.Should().NotBeNull();
+            value.Should().BeOfType<Node>();
+            var node = value.As<Node>();
+
+            node.ElementId.Should().Be("1");
+            node.Id.Should().Be(-1L);
+
+            node.Labels.Should().Equal(new[] { "Label1", "Label2" });
+            node.Properties.Should().HaveCount(3).And.Contain(new[]
+            {
+                new KeyValuePair<string, object>("prop1", "something"),
+                new KeyValuePair<string, object>("prop2", 15L),
+                new KeyValuePair<string, object>("prop3", true),
+            });
+        }
+    }
+}