add test for #1431

Dapper.Tests/Dapper.Tests.csproj

@@ -3,7 +3,7 @@
     <AssemblyName>Dapper.Tests</AssemblyName>
     <Description>Dapper Core Test Suite</Description>
     <GenerateDocumentationFile>false</GenerateDocumentationFile>
-    <TargetFrameworks>netcoreapp2.1;net462;net472</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.1;net462;net472;netcoreapp3.1</TargetFrameworks>
     <TreatWarningsAsErrors>false</TreatWarningsAsErrors>
     <DefineConstants>$(DefineConstants);MSSQLCLIENT</DefineConstants>
   </PropertyGroup>

Dapper.Tests/Issues/Issue1431.cs

+using System.Collections.Generic;
+using System.Data;
+using System.Threading.Tasks;
+using Xunit;
+
+namespace Dapper.Tests.Issues
+{
+    [Collection("Issues")]
+    public sealed class SystemSqlClientIssue1431 : Issue1431<SystemSqlClientProvider> { }
+#if MSSQLCLIENT
+    [Collection("Issues")]
+    public sealed class MicrosoftSqlClientIssue1431 : Issue1431<MicrosoftSqlClientProvider> { }
+#endif
+    public abstract class Issue1431<TProvider> : TestBase<TProvider> where TProvider : DatabaseProvider
+    {
+        [Fact]
+        public async Task CanUseDataTableTVP()
+        {
+            InitSchema();
+            var result = (await GetSomeData(new[] { 1, 2, 3 }));
+            Assert.Equal("1,2,3", string.Join(",", result));
+        }
+
+        private void InitSchema()
+        {
+            try { connection.Execute("drop proc Issue1431_GetDataWithTVP"); } catch { }
+            try { connection.Execute("drop type Issue1431_IdFilter"); } catch { }
+            
+            connection.Execute("CREATE TYPE Issue1431_IdFilter AS TABLE (Id int NOT NULL)");
+            connection.Execute(@"CREATE PROC Issue1431_GetDataWithTVP (@IdFilter Issue1431_IdFilter READONLY)
+AS
+BEGIN
+
+    SET NOCOUNT ON;
+
+    SELECT Id
+      FROM @IdFilter;
+END");
+        }
+        public async Task<IEnumerable<int>> GetSomeData(IEnumerable<int> idFilter)
+        {
+            
+            var dataTable = GetDataTable(idFilter);
+
+            var dynamicParams = new DynamicParameters(new { IdFilter = dataTable });
+
+            return await connection.QueryAsync<int>("Issue1431_GetDataWithTVP", dynamicParams, commandType: CommandType.StoredProcedure);
+        }
+
+        private static DataTable GetDataTable(IEnumerable<int> idFilter)
+        {
+            var dt = new DataTable();
+            dt.Columns.Add("Id", typeof(int));
+
+            if (idFilter == null) return dt;
+
+            foreach (var id in idFilter)
+            {
+                dt.Rows.Add(id);
+            }
+
+            return dt;
+        }
+    }
+}