public void TestOperations()
{
// invalid operations
using (var stack = new StreamStack())
{
AssertException(() => stack.Push(null));
Assert.IsNull(stack.GetStream<Stream>());
stack.Push(new MemoryStream());
AssertException(() => stack.Seek(0, SeekOrigin.Current));
}
// stream access
using (var stack = new StreamStack())
{
var buffer = new MemoryStream();
var test = new TestStream(buffer);
stack.Push(buffer);
Assert.AreEqual(stack.Top, buffer);
stack.Push(test);
Assert.AreEqual(stack.Top, test);
Assert.AreEqual(stack.GetStream<MemoryStream>(), buffer);
Assert.AreEqual(stack.GetStream<TestStream>(), test);
}
// stream flush
using (var stack = new StreamStack())
{
var stream1 = new TestStream(new MemoryStream());
var stream2 = new TestStream(stream1);
stack.Push(stream1);
stack.Push(stream2);
stack.Flush();
Assert.IsTrue(stream1.Flushed);
Assert.IsTrue(stream2.Flushed);
}
// stream read
using (var stack = new StreamStack())
{
var buffer = new MemoryStream();
StreamWrite(buffer, "test");
buffer.Position = 0;
stack.Push(buffer);
stack.Push(new TestStream(stack.Top));
Assert.AreEqual(StreamRead(stack), "test");
}
// stream write
using (var stack = new StreamStack())
{
var buffer = new MemoryStream();
stack.Push(buffer);
stack.Push(new TestStream(stack.Top));
StreamWrite(stack, "test");
buffer.Position = 0;
Assert.AreEqual(StreamRead(buffer), "test");
}
// stream disposal
using (var stack = new StreamStack())
{
var stream1 = new TestStream(new MemoryStream());
var stream2 = new TestStream(stream1);
stack.Push(stream1);
stack.Push(stream2);
stack.Dispose();
Assert.IsTrue(stream1.Disposed);
Assert.IsTrue(stream2.Disposed);
}
}
