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package mill.clientserver
import java.io._
import java.nio.file.Path
import utest._
class EchoServer extends ServerMain[Int]{
def main0(args: Array[String],
stateCache: Option[Int],
mainInteractive: Boolean,
stdin: InputStream,
stdout: PrintStream,
stderr: PrintStream) = {
val reader = new BufferedReader(new InputStreamReader(stdin))
val str = reader.readLine()
stdout.println(str + args(0))
stdout.flush()
stderr.println(str.toUpperCase + args(0))
stderr.flush()
(true, None)
}
}
object ClientServerTests extends TestSuite{
def initStreams() = {
val in = new ByteArrayInputStream("hello\n".getBytes())
val out = new ByteArrayOutputStream()
val err = new ByteArrayOutputStream()
(in, out, err)
}
def init() = {
val tmpDir = java.nio.file.Files.createTempDirectory("")
val locks = new MemoryLocks()
(tmpDir, locks)
}
def tests = Tests{
'hello - {
val (tmpDir, locks) = init()
def spawnEchoServer(): Unit = {
new Thread(() => new Server(
tmpDir.toString,
new EchoServer(),
() => (),
1000,
locks
).run()).start()
}
def runClient(arg: String) = {
val (in, out, err) = initStreams()
locks.clientLock.lockBlock{
val c = new Client(
tmpDir.toString,
() => spawnEchoServer(),
locks,
in,
out,
err
)
c.run(Array(arg))
(new String(out.toByteArray), new String(err.toByteArray))
}
}
// Make sure the simple "have the client start a server and
// exchange one message" workflow works from end to end.
assert(
locks.clientLock.probe(),
locks.serverLock.probe(),
locks.processLock.probe()
)
val (out1, err1) = runClient("world")
assert(
out1 == "helloworld\n",
err1 == "HELLOworld\n"
)
// Give a bit of time for the server to release the lock and
// re-acquire it to signal to the client that it's done
Thread.sleep(100)
assert(
locks.clientLock.probe(),
!locks.serverLock.probe(),
!locks.processLock.probe()
)
// A seecond client in sequence connect to the same server
val (out2, err2) = runClient(" WORLD")
assert(
out2 == "hello WORLD\n",
err2 == "HELLO WORLD\n"
)
// Make sure the server times out of not used for a while
Thread.sleep(2000)
assert(
locks.clientLock.probe(),
locks.serverLock.probe(),
locks.processLock.probe()
)
// Have a third client spawn/connect-to a new server at the same path
val (out3, err3) = runClient(" World")
assert(
out3 == "hello World\n",
err3 == "HELLO World\n"
)
}
}
}
|
