Add test for sequential /shell/run requests

This also fixes test bugs in the cases:
- Malformed json
- No json

tests/units/test_0003_shellrun.py

@@ -48,7 +48,7 @@ class TestShellRunMethods(unittest.TestCase):
     def test_no_json(self):
         c = Client()
         s = Server()
-        s.connect(probe=False)
+        s.connect()
         s.send('POST /shell/run HTTP/1.0\r\nContent-Length:0\r\n\r\n')
         response = s.recv()
         s.stop()
@@ -62,12 +62,35 @@ class TestShellRunMethods(unittest.TestCase):
               '\r\nContent-Type:application/json\r\n\r\n' + json
         c = Client()
         s = Server()
-        s.connect(probe=False)
+        s.connect()
         s.send(msg)
         response = s.recv()
         s.stop()
         c.stop()
         self.assertEqual(response, 'HTTP/1.0 400 Bad Request\r\n\r\n')
 
+    def test_serial_requests(self):
+        req1_json = '{"run":"echo 1", "echo":true}'
+        req1 = 'POST /shell/run HTTP/1.0\r\nContent-Length:'+ \
+               str(len(req1_json)) + \
+               '\r\nContent-Type:application/json\r\n\r\n' + req1_json
+        req2_json = '{"run":"echo 2", "echo":true}'
+        req2 = 'POST /shell/run HTTP/1.0\r\nContent-Length:'+ \
+               str(len(req2_json)) + \
+               '\r\nContent-Type:application/json\r\n\r\n' + req2_json
+        response_json = '{"out": "2\n"}'
+        resp = 'HTTP/1.0 200 OK\r\nContent-Length:' + \
+               str(len(response_json)) + \
+               '\r\nContent-Type:application/json\r\n\r\n' + response_json
+        c = Client()
+        s = Server()
+        s.connect()
+        s.send(req1)
+        s.send(req2)
+        client_response = s.recv()
+        s.stop()
+        c.stop()
+        self.assertEqual(client_response, client_response)
+
 if __name__ == '__main__':
     unittest.main()