 
 class TCPIPChannelTests: SessionTestCase, SSHKitChannelDelegate {
     private var openExpectation: XCTestExpectation?
+    private var closeExpectation: XCTestExpectation?
     private var writeExpectation: XCTestExpectation?
     
     let echoTask = NSTask()
     let echoHost = "127.0.0.1"
-    let echoPort : UInt16 = 6007
+    let echoPort = 6007
     
     var writeDataCount: Int = 0
     let writeDataMaxTimes = 100

        print("didReadStderrData")
    }

}
        do {
            let channel = try self.openDirectChannelWithTargetHost(echoHost, port: echoPort)
            XCTAssert(channel.isOpen)
            XCTAssertEqual(channel.targetHost, echoHost)
            XCTAssertEqual( Int(channel.targetPort), echoPort)
        } catch let error as NSError {
            XCTFail(error.localizedDescription)
        }
