public void No_Bold_Claims() { //Arrange var functions = new Mock <Functions>(); var writeCalls = new List <(long, int)>(); var namespaceVirt = (IntPtr)7; var dataStreamId = Guid.NewGuid(); var allocSize = (2 << 12); IntPtr buffer = Marshal.AllocHGlobal(allocSize); var aligned = AlignedBufferHandle.FromIntPtr(functions.Object, buffer); functions.Setup(f => f.PrjAllocateAlignedBuffer(namespaceVirt, (UIntPtr)allocSize)).Returns(aligned); //Act var stream = new FileWriteStream(0, allocSize, namespaceVirt, dataStreamId, functions.Object); //Assert var tempBuffer = new byte[200]; Assert.False(stream.CanRead); Assert.False(stream.CanSeek); Assert.True(stream.CanWrite); Assert.Throws <NotSupportedException>(() => stream.Read(tempBuffer, 0, tempBuffer.Length)); Assert.Throws <NotSupportedException>(() => stream.Seek(0, System.IO.SeekOrigin.Begin)); Assert.Throws <NotSupportedException>(() => stream.SetLength(0)); Assert.Throws <NotSupportedException>(() => stream.Position = 10); Assert.Throws <NotSupportedException>(() => { var item = stream.Position; }); Assert.Throws <NotSupportedException>(() => { var length = stream.Length; }); }