public void SetLength_Negative ()
{
UnmanagedMemoryStream ums = new UnmanagedMemoryStream(mem_byteptr,
length, capacity, FileAccess.ReadWrite);
try {
ums.SetLength(-1);
Assert.Fail ("#1");
} catch (ArgumentOutOfRangeException ex) {
// Non-negative number required
Assert.AreEqual (typeof (ArgumentOutOfRangeException), ex.GetType (), "#2");
Assert.IsNull (ex.InnerException, "#3");
Assert.IsNotNull (ex.Message, "#4");
Assert.IsNotNull (ex.ParamName, "#5");
Assert.AreEqual ("length", ex.ParamName, "#6");
}
ums.Close();
}
public void SetLength ()
{
UnmanagedMemoryStream ums = new UnmanagedMemoryStream(mem_byteptr,
length, capacity, FileAccess.ReadWrite);
ums.Write (testStreamData, 0, testStreamData.Length);
ums.SetLength (length - 1);
Assert.AreEqual (capacity, ums.Capacity, "#A1");
Assert.AreEqual (length - 1, ums.Length, "#A2");
Assert.AreEqual (length - 1, ums.Position, "#A3");
ums.SetLength (length + 1);
Assert.AreEqual (capacity, ums.Capacity, "#B1");
Assert.AreEqual (length + 1, ums.Length, "#B2");
Assert.AreEqual (length - 1, ums.Position, "#B3");
ums.SetLength (length);
Assert.AreEqual (capacity, ums.Capacity, "#C1");
Assert.AreEqual (length, ums.Length, "#C2");
Assert.AreEqual (length - 1, ums.Position, "#C3");
ums.SetLength (0);
Assert.AreEqual (capacity, ums.Capacity, "#D1");
Assert.AreEqual (0, ums.Length, "#D2");
Assert.AreEqual (0, ums.Position, "#D3");
ums.SetLength (capacity);
Assert.AreEqual (capacity, ums.Capacity, "#E1");
Assert.AreEqual (capacity, ums.Length, "#E2");
Assert.AreEqual (0, ums.Position, "#E3");
ums.Close();
}
public void SetLength_Capacity_Exceeded ()
{
UnmanagedMemoryStream ums = new UnmanagedMemoryStream(mem_byteptr,
length, capacity, FileAccess.ReadWrite);
try {
ums.SetLength (capacity + 1);
Assert.Fail ("#1");
} catch (IOException ex) {
// Unable to expand length of this stream beyond its capacity
Assert.AreEqual (typeof (IOException), ex.GetType (), "#2");
Assert.IsNull (ex.InnerException, "#3");
Assert.IsNotNull (ex.Message, "#4");
}
ums.Close();
}
public void SetLength_Stream_ReadOnly ()
{
UnmanagedMemoryStream ums = new UnmanagedMemoryStream(mem_byteptr,
length);
try {
ums.SetLength (length);
Assert.Fail ("#1");
} catch (NotSupportedException ex) {
// Stream does not support writing
Assert.AreEqual (typeof (NotSupportedException), ex.GetType (), "#2");
Assert.IsNull (ex.InnerException, "#3");
Assert.IsNotNull (ex.Message, "#4");
}
ums.Close();
}