mono/mcs/class/System.Data.DataSetExtensions/Test/System.Data/DataRowExtensionsTest.cs

//
// DataRowExtensionsTest.cs
//
// Author:
//   Marek Habersack ([email protected])
//
// Copyright (C) 2008 Novell, Inc. http://www.novell.com
//

//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

using System;
using System.Collections.Generic;
using System.Data;
using NUnit.Framework;

namespace MonoTests.System.Data
{
	[TestFixture]
	public class DataRowExtensionsTest
	{
		DataRow SetupRow ()
		{
			DataTable dt = new DataTable ("TestTable");
			DataColumn dc = new DataColumn ("Column1", typeof (string));
			dc.AllowDBNull = true;
			dt.Columns.Add (dc);

			dc = new DataColumn ("Column2", typeof (int));
			dc.AllowDBNull = true;
			dt.Columns.Add (dc);
			
			DataRow row = dt.NewRow ();
			dt.Rows.Add (row);
			return row;
		}
		
		[Test]
		public void Field_T_DBNullFieldValue ()
		{
			DataRow row = SetupRow ();
			row ["Column1"] = null;
			row ["Column2"] = DBNull.Value;
			
			string s = row.Field <string> ("Column1");
			Assert.AreEqual (null, s, "#A1");

			int? i = row.Field <int?> ("Column2");
			Assert.AreEqual (null, i, "#A2");
		}

		[Test]
		[ExpectedException (typeof (StrongTypingException))]
		public void Field_T_DBNullFieldValue_ValueType ()
		{
			DataRow row = SetupRow ();
			row ["Column1"] = null;
			row ["Column2"] = DBNull.Value;

			int i = row.Field <int> ("Column2");
		}
	}
}