Add test cases for list and array

Author: Giorgi

DuckDB.NET.Data/Internal/Writer/ListVectorDataWriter.cs

@@ -111,6 +111,11 @@ private void ResizeVector(int rowIndex, ulong count)
         vectorReservedSize = (ulong)Math.Max(vectorReservedSize * factor, offset + count);
         var state = NativeMethods.Vectors.DuckDBListVectorReserve(Vector, vectorReservedSize);
 
+        if (!state.IsSuccess())
+        {
+            throw new DuckDBException($"Failed to reserve {vectorReservedSize} for the list vector");
+        }
+
         listItemWriter.FetchDataPointer();
     }
 }

DuckDB.NET.Test/DuckDBManagedAppenderListTests.cs

@@ -14,6 +14,12 @@ public void ListValuesBool()
         ListValuesInternal("Bool", faker => faker.Random.Bool());
     }
 
+    [Fact]
+    public void ListValuesString()
+    {
+        ListValuesInternal("Varchar", faker => faker.Random.Utf16String());
+    }
+
     [Fact]
     public void ListValuesSByte()
     {
@@ -26,26 +32,34 @@ public void ListValuesInt()
         ListValuesInternal("Integer", faker => faker.Random.Int());
     }
 
+    [Fact]
+    public void ArrayValuesInt()
+    {
+        ListValuesInternal("Integer", faker => faker.Random.Int(), 5);
+    }
+
     [Fact]
     public void ListValuesLong()
     {
         ListValuesInternal("BigInt", faker => faker.Random.Long());
     }
 
-    public void ListValuesInternal<T>(string typeName, Func<Faker, T> generator)
+
+    public void ListValuesInternal<T>(string typeName, Func<Faker, T> generator, int? length = null)
     {
         var rows = 2000;
         var table = $"managedAppender{typeName}Lists";
 
-        Command.CommandText = $"CREATE TABLE {table} (a Integer, b {typeName}[], c {typeName}[][]);";
+        var columnLength = length.HasValue ? length.Value.ToString() : "";
+        Command.CommandText = $"CREATE TABLE {table} (a Integer, b {typeName}[{columnLength}], c {typeName}[][]);";
         Command.ExecuteNonQuery();
 
         var lists = new List<List<T>>();
         var nestedLists = new List<List<List<T>>>();
 
         for (var i = 0; i < rows; i++)
         {
-            lists.Add(GetRandomList(generator, Random.Shared.Next(0, 200)));
+            lists.Add(GetRandomList(generator, length ?? Random.Shared.Next(0, 200)));
 
             var item = new List<List<T>>();
             nestedLists.Add(item);
@@ -78,5 +92,17 @@ public void ListValuesInternal<T>(string typeName, Func<Faker, T> generator)
 
             index++;
         }
+
+        //Test for appending an array with wrong length
+        if (length.HasValue)
+        {
+            var appender = Connection.CreateAppender(table);
+
+            appender.Invoking(app => app.CreateRow().AppendValue(0).AppendValue(GetRandomList(generator, length + 1)))
+                .Should().Throw<InvalidOperationException>().Where(exception => exception.Message.Contains(length.ToString()));
+
+            appender.Invoking(app => app.CreateRow().AppendValue(0).AppendValue(GetRandomList(generator, length - 1)))
+                .Should().Throw<InvalidOperationException>().Where(exception => exception.Message.Contains(length.ToString()));
+        }
     }
 }