public void TestCanReadWriteSeek()
{
using (var stream = new Pop3Stream(new DummyNetworkStream(), new NullProtocolLogger())) {
Assert.IsTrue(stream.CanRead);
Assert.IsTrue(stream.CanWrite);
Assert.IsFalse(stream.CanSeek);
Assert.IsTrue(stream.CanTimeout);
}
}
public void TestSeek()
{
using (var stream = new Pop3Stream(new DummyNetworkStream(), new NullProtocolLogger())) {
Assert.Throws <NotSupportedException> (() => stream.Seek(0, SeekOrigin.Begin));
Assert.Throws <NotSupportedException> (() => stream.Position = 500);
Assert.AreEqual(0, stream.Position);
Assert.AreEqual(0, stream.Length);
}
}
public void TestGetSetTimeouts()
{
using (var stream = new Pop3Stream(new DummyNetworkStream(), new NullProtocolLogger())) {
stream.ReadTimeout = 5;
Assert.AreEqual(5, stream.ReadTimeout, "ReadTimeout");
stream.WriteTimeout = 7;
Assert.AreEqual(7, stream.WriteTimeout, "WriteTimeout");
}
}
public void TestRead()
{
using (var stream = new Pop3Stream(new DummyNetworkStream(), new NullProtocolLogger())) {
var data = Encoding.ASCII.GetBytes("+OK\r\n");
var buffer = new byte[16];
Assert.Throws <ArgumentNullException> (() => stream.Read(null, 0, buffer.Length));
Assert.Throws <ArgumentOutOfRangeException> (() => stream.Read(buffer, -1, buffer.Length));
Assert.Throws <ArgumentOutOfRangeException> (() => stream.Read(buffer, 0, -1));
stream.Stream.Write(data, 0, data.Length);
stream.Stream.Position = 0;
stream.Mode = Pop3StreamMode.Line;
Assert.Throws <InvalidOperationException> (() => stream.Read(buffer, 0, buffer.Length));
stream.Mode = Pop3StreamMode.Data;
var n = stream.Read(buffer, 0, buffer.Length);
Assert.AreEqual(data.Length, n, "Read");
Assert.AreEqual("+OK\r\n", Encoding.ASCII.GetString(buffer, 0, n), "Read");
}
}
public async Task TestWriteAsync()
{
using (var stream = new Pop3Stream(new DummyNetworkStream(), new NullProtocolLogger())) {
var memory = (MemoryStream)stream.Stream;
var buffer = new byte[8192];
var buf1k = new byte[1024];
var buf4k = new byte[4096];
var buf9k = new byte[9216];
byte[] mem;
using (var rng = new RNGCryptoServiceProvider()) {
rng.GetBytes(buf1k);
rng.GetBytes(buf4k);
rng.GetBytes(buf9k);
}
// Test #1: write less than 4K to make sure that Pop3Stream buffers it
await stream.WriteAsync(buf1k, 0, buf1k.Length);
Assert.AreEqual(0, memory.Length, "#1");
// Test #2: make sure that flushing the Pop3Stream flushes the entire buffer out to the network
await stream.FlushAsync();
Assert.AreEqual(buf1k.Length, memory.Length, "#2");
mem = memory.GetBuffer();
for (int i = 0; i < buf1k.Length; i++)
{
Assert.AreEqual(buf1k[i], mem[i], "#2 byte[{0}]", i);
}
memory.SetLength(0);
// Test #3: write exactly 4K to make sure it passes through w/o the need to flush
await stream.WriteAsync(buf4k, 0, buf4k.Length);
Assert.AreEqual(buf4k.Length, memory.Length, "#3");
mem = memory.GetBuffer();
for (int i = 0; i < buf4k.Length; i++)
{
Assert.AreEqual(buf4k[i], mem[i], "#3 byte[{0}]", i);
}
memory.SetLength(0);
// Test #4: write 1k and then write 4k, make sure that only 4k passes thru (last 1k gets buffered)
await stream.WriteAsync(buf1k, 0, buf1k.Length);
await stream.WriteAsync(buf4k, 0, buf4k.Length);
Assert.AreEqual(4096, memory.Length, "#4");
await stream.FlushAsync();
Assert.AreEqual(buf1k.Length + buf4k.Length, memory.Length, "#4");
Array.Copy(buf1k, 0, buffer, 0, buf1k.Length);
Array.Copy(buf4k, 0, buffer, buf1k.Length, buf4k.Length);
mem = memory.GetBuffer();
for (int i = 0; i < buf1k.Length + buf4k.Length; i++)
{
Assert.AreEqual(buffer[i], mem[i], "#4 byte[{0}]", i);
}
memory.SetLength(0);
// Test #5: write 9k and make sure only the first 8k goes thru (last 1k gets buffered)
await stream.WriteAsync(buf9k, 0, buf9k.Length);
Assert.AreEqual(8192, memory.Length, "#5");
await stream.FlushAsync();
Assert.AreEqual(buf9k.Length, memory.Length, "#5");
mem = memory.GetBuffer();
for (int i = 0; i < buf9k.Length; i++)
{
Assert.AreEqual(buf9k[i], mem[i], "#5 byte[{0}]", i);
}
memory.SetLength(0);
}
}
public void TestSetLength()
{
using (var stream = new Pop3Stream(new DummyNetworkStream(), new NullProtocolLogger())) {
Assert.Throws <NotSupportedException> (() => stream.SetLength(500));
}
}