#region License
// The PostgreSQL License
//
// Copyright (C) 2015 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 System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using Npgsql;
using NUnit.Framework;
namespace Npgsql.Tests
{
class NpgsqlBufferTests
{
[Test]
public void Skip()
{
for (byte i = 0; i < 50; i++)
Underlying.WriteByte(i);
Underlying.Seek(0, SeekOrigin.Begin);
Buffer.Ensure(10);
Buffer.Skip(7);
Assert.That(Buffer.ReadByte(), Is.EqualTo(7));
Buffer.Skip(10);
Buffer.Ensure(1);
Assert.That(Buffer.ReadByte(), Is.EqualTo(18));
Buffer.Skip(20);
Buffer.Ensure(1);
Assert.That(Buffer.ReadByte(), Is.EqualTo(39));
}
[Test]
public void ReadSingle()
{
const float expected = 8.7f;
var bytes = BitConverter.GetBytes(expected);
Array.Reverse(bytes);
Underlying.Write(bytes, 0, bytes.Length);
Underlying.WriteByte(8);
Underlying.Seek(0, SeekOrigin.Begin);
Buffer.Ensure(5);
Assert.That(Buffer.ReadSingle(), Is.EqualTo(expected));
Assert.That(Buffer.ReadByte(), Is.EqualTo(8));
}
[Test]
public void ReadDouble()
{
const double expected = 8.7;
var bytes = BitConverter.GetBytes(expected);
Array.Reverse(bytes);
Underlying.Write(bytes, 0, bytes.Length);
Underlying.WriteByte(8);
Underlying.Seek(0, SeekOrigin.Begin);
Buffer.Ensure(9);
Assert.That(Buffer.ReadDouble(), Is.EqualTo(expected));
Assert.That(Buffer.ReadByte(), Is.EqualTo(8));
}
[Test]
public void ReadChars()
{
const string expected = "This string is bigger than the buffer length";
var bytes = Encoding.UTF8.GetBytes(expected);
Underlying.Write(bytes, 0, bytes.Length);
Underlying.Seek(0, SeekOrigin.Begin);
var chars = new char[expected.Length + 5];
int bytesRead, charsRead;
Buffer.ReadAllChars(chars, 5, expected.Length, bytes.Length, out bytesRead, out charsRead);
Assert.That(charsRead, Is.EqualTo(expected.Length));
Assert.That(bytesRead, Is.EqualTo(bytes.Length));
var actual = new string(chars, 5, expected.Length);
Assert.That(actual, Is.EqualTo(expected));
}
[Test]
public void ReadCharsTooMany()
{
const string expected = "This string is bigger than the buffer length";
var bytes = Encoding.UTF8.GetBytes(expected);
Underlying.Write(bytes, 0, bytes.Length);
Underlying.Seek(0, SeekOrigin.Begin);
var chars = new char[expected.Length + 5];
int bytesRead, charsRead;
Buffer.ReadAllChars(chars, 0, expected.Length + 5, bytes.Length, out bytesRead, out charsRead);
Assert.That(charsRead, Is.EqualTo(expected.Length));
Assert.That(bytesRead, Is.EqualTo(bytes.Length));
var actual = new string(chars, 0, expected.Length);
Assert.That(actual, Is.EqualTo(expected));
}
[SetUp]
public void SetUp()
{
Underlying = new MemoryStream();
Buffer = new NpgsqlBuffer(Underlying, NpgsqlBuffer.DefaultBufferSize, PGUtil.UTF8Encoding);
}
NpgsqlBuffer Buffer;
MemoryStream Underlying;
}
}