public void TestOriginChange()
{
var inst = new RegionMemoryStream();
var writer = new BinaryWriter(inst);
for (int i = 0; i < 100; i++)
{
int curOrigin = inst.Origin;
inst.SetOriginLength(curOrigin + 4, -1);
Assert.AreEqual(0, inst.Position);
Assert.AreEqual(0, inst.Length);
Assert.IsTrue(inst.CanWrite);
for (int j = 1; j <= 10; j++)
{
writer.Write(j);
}
inst.Seek(4, SeekOrigin.Begin);
Assert.AreEqual(40, inst.Length);
int length = (int)inst.Length;
inst.SetOrigin(curOrigin);
writer.Write(length);
inst.Seek(0, SeekOrigin.End);
inst.SetCurrentPositionAsOrigin();
}
Assert.AreEqual(100 * (4 * 10 + 4), inst.InnerStream.Length);
var reader = new BinaryReader(inst);
inst.SetOrigin(0);
for (int i = 0; i < 100; i++)
{
inst.SetCurrentPositionAsOrigin(4);
int length = reader.ReadInt32();
inst.SetCurrentPositionAsOrigin(length);
Assert.AreEqual(0, inst.Position);
Assert.AreEqual(length, inst.Length);
Assert.IsFalse(inst.CanWrite);
for (int j = 1; j <= 10; j++)
{
Assert.AreEqual(j, reader.ReadInt32());
}
inst.Seek(4, SeekOrigin.Begin);
inst.Seek(0, SeekOrigin.End);
}
}
public void TestReadWrite()
{
var inst = new RegionMemoryStream();
Assert.IsTrue(inst.CanRead);
Assert.IsTrue(inst.CanWrite);
Assert.IsTrue(inst.CanSeek);
var writer = new BinaryWriter(inst);
for (int i = 0; i < 10; i++)
{
writer.Write(i);
}
inst.Position = 0;
var reader = new BinaryReader(inst);
for (int i = 0; i < 10; i++)
{
Assert.AreEqual(i, reader.ReadInt32());
}
}
public void TestSeekPosition()
{
var inst = new RegionMemoryStream();
var writer = new BinaryWriter(inst);
for (int j = 1; j <= 10; j++)
{
writer.Write(j);
}
inst.SetOriginLength(4, 12);
Assert.AreEqual(4, inst.Origin);
Assert.AreEqual(0, inst.Position);
Assert.AreEqual(12, inst.Length);
inst.Seek(4, SeekOrigin.Begin);
Assert.AreEqual(4, inst.Origin);
Assert.AreEqual(4, inst.Position);
Assert.AreEqual(12, inst.Length);
inst.Seek(4, SeekOrigin.Current);
Assert.AreEqual(4, inst.Origin);
Assert.AreEqual(8, inst.Position);
Assert.AreEqual(12, inst.Length);
inst.Seek(-8, SeekOrigin.End);
Assert.AreEqual(4, inst.Origin);
Assert.AreEqual(4, inst.Position);
Assert.AreEqual(12, inst.Length);
inst.Position = 6;
Assert.AreEqual(4, inst.Origin);
Assert.AreEqual(6, inst.Position);
Assert.AreEqual(12, inst.Length);
try
{
inst.Seek(-20, SeekOrigin.End);
Assert.Fail("exception expected");
}
catch (IOException) { }
try
{
inst.Seek(20, SeekOrigin.Begin);
inst.WriteByte(1);
Assert.Fail("exception expected");
}
catch (NotSupportedException) { }
try
{
inst.Seek(20, SeekOrigin.Current);
inst.WriteByte(1);
Assert.Fail("exception expected");
}
catch (NotSupportedException) { }
}
