Add support for Bolt v4(.1) (#10)

* Added handshake support
* Add support for v4 hello and goodbye
* Add support for pulling n results
* Add support for transactions
* Add pull n for the dump
* Add support for NOOP
* Add support for multiple queries
* Update bolt session to support qid
* Update drivers test with multiple versions and go
* Extract failure handling into a function
* Use unique ptr instead of optional for query execution
* Destroy stream before query execution

Co-authored-by: Antonio Andelic <antonio.andelic@memgraph.io>

tests/drivers/csharp/v4_1/Basic/Basic.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp2.1</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Neo4j.Driver.Simple" Version="4.1.1" />
+  </ItemGroup>
+
+</Project>

tests/drivers/csharp/v4_1/Basic/Program.cs

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+using System;
+using System.Linq;
+using Neo4j.Driver;
+
+public class Basic {
+  public static void Main(string[] args) {
+    using(var driver = GraphDatabase.Driver("bolt://localhost:7687", AuthTokens.None, (ConfigBuilder builder) => builder.WithEncryptionLevel(EncryptionLevel.None)))
+      using(var session = driver.Session())
+      {
+        session.Run("MATCH (n) DETACH DELETE n").Consume();
+        session.Run("CREATE (alice:Person {name: \"Alice\", age: 22})").Consume();
+        var result = session.Run("MATCH (n) RETURN n").First();
+        var alice = (INode) result["n"];
+        Console.WriteLine(alice["name"]);
+        Console.WriteLine(string.Join(", ", alice.Labels));
+        Console.WriteLine(alice["age"]);
+      }
+    Console.WriteLine("All ok!");
+  }
+}

tests/drivers/csharp/v4_1/Transactions/Program.cs

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+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using Neo4j.Driver;
+
+public class Transactions
+{
+  public static void Main(string[] args) {
+    using(var driver = GraphDatabase.Driver("bolt://localhost:7687", AuthTokens.None, (builder) => builder.WithEncryptionLevel(EncryptionLevel.None)))
+    {
+      ClearDatabase(driver);
+      // Wrong query.
+      try
+      {
+        using(var session = driver.Session())
+          using(var tx = session.BeginTransaction())
+          {
+            CreatePerson(tx, "mirko");
+            // Incorrectly start CREATE
+            tx.Run("CREATE (").Consume();
+            CreatePerson(tx, "slavko");
+            tx.Commit();
+          }
+      }
+      catch (ClientException)
+      {
+        Console.WriteLine("Rolled back transaction");
+      }
+      Trace.Assert(CountNodes(driver) == 0, "Expected transaction was rolled back.");
+      // Correct query.
+      using(var session = driver.Session())
+        using(var tx = session.BeginTransaction())
+        {
+          CreatePerson(tx, "mirka");
+          CreatePerson(tx, "slavka");
+          tx.Commit();
+        }
+      Trace.Assert(CountNodes(driver) == 2, "Expected 2 created nodes.");
+      ClearDatabase(driver);
+      using(var session = driver.Session())
+      {
+        // Create a lot of nodes so that the next read takes a long time.
+        session.Run("UNWIND range(1, 100000) AS i CREATE ()").Consume();
+        try
+        {
+          Console.WriteLine("Running a long read...");
+          session.Run("MATCH (a), (b), (c), (d), (e), (f) RETURN COUNT(*) AS cnt").Consume();
+        }
+        catch (TransientException)
+        {
+          Console.WriteLine("Transaction timed out");
+        }
+      }
+    }
+    Console.WriteLine("All ok!");
+  }
+
+  private static void CreatePerson(ITransaction tx, string name)
+  {
+    var parameters = new Dictionary<string, Object>{{"name", name}};
+    var result = tx.Run("CREATE (person:Person {name: $name}) RETURN person", parameters);
+    Console.WriteLine("Created: " + ((INode) result.First()["person"])["name"]);
+  }
+
+  private static void ClearDatabase(IDriver driver)
+  {
+    using(var session = driver.Session())
+      session.Run("MATCH (n) DETACH DELETE n").Consume();
+  }
+
+  private static int CountNodes(IDriver driver)
+  {
+    using(var session = driver.Session())
+    {
+      var result = session.Run("MATCH (n) RETURN COUNT(*) AS cnt");
+      return Convert.ToInt32(result.First()["cnt"]);
+    }
+  }
+}

tests/drivers/csharp/v4_1/Transactions/Transactions.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp2.1</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Neo4j.Driver.Simple" Version="4.1.1" />
+  </ItemGroup>
+
+</Project>

tests/drivers/csharp/v4_1/run.sh

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+#!/bin/bash -e
+
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+cd "$DIR"
+
+# check if dotnet-sdk-2.1 is installed
+for i in dotnet; do
+  if ! which $i >/dev/null; then
+    echo "Please install $i!"
+    exit 1
+  fi
+done
+
+for i in *; do
+  if [ ! -d $i ]; then 
+    continue
+  fi 
+  pushd $i
+  dotnet publish -c release --self-contained --runtime linux-x64 --framework netcoreapp2.1 -o build/
+  ./build/$i
+  popd
+done;