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LargeObjectTests.cs
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78 lines (68 loc) · 2.81 KB
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#region License
// The PostgreSQL License
//
// Copyright (C) 2017 The Npgsql Development Team
//
// Permission to use, copy, modify, and distribute this software and its
// documentation for any purpose, without fee, and without a written
// agreement is hereby granted, provided that the above copyright notice
// and this paragraph and the following two paragraphs appear in all copies.
//
// IN NO EVENT SHALL THE NPGSQL DEVELOPMENT TEAM BE LIABLE TO ANY PARTY
// FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,
// INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS
// DOCUMENTATION, EVEN IF THE NPGSQL DEVELOPMENT TEAM HAS BEEN ADVISED OF
// THE POSSIBILITY OF SUCH DAMAGE.
//
// THE NPGSQL DEVELOPMENT TEAM SPECIFICALLY DISCLAIMS ANY WARRANTIES,
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
// ON AN "AS IS" BASIS, AND THE NPGSQL DEVELOPMENT TEAM HAS NO OBLIGATIONS
// TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
#endregion
using Npgsql;
using Npgsql.Tests;
using NUnit.Framework;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Npgsql.Tests
{
public class LargeObjectTests : TestBase
{
[Test]
public void Test()
{
using (var conn = OpenConnection())
using (var transaction = conn.BeginTransaction())
{
var manager = new NpgsqlLargeObjectManager(conn);
var oid = manager.Create();
using (var stream = manager.OpenReadWrite(oid))
{
var buf = Encoding.UTF8.GetBytes("Hello");
stream.Write(buf, 0, buf.Length);
stream.Seek(0, System.IO.SeekOrigin.Begin);
var buf2 = new byte[buf.Length];
stream.Read(buf2, 0, buf2.Length);
Assert.That(buf.SequenceEqual(buf2));
Assert.AreEqual(5, stream.Position);
Assert.AreEqual(5, stream.Length);
stream.Seek(-1, System.IO.SeekOrigin.Current);
Assert.AreEqual((int)'o', stream.ReadByte());
manager.MaxTransferBlockSize = 3;
stream.Write(buf, 0, buf.Length);
stream.Seek(-5, System.IO.SeekOrigin.End);
var buf3 = new byte[100];
Assert.AreEqual(5, stream.Read(buf3, 0, 100));
Assert.That(buf.SequenceEqual(buf3.Take(5)));
stream.SetLength(43);
Assert.AreEqual(43, stream.Length);
}
manager.Unlink(oid);
transaction.Rollback();
}
}
}
}