Ensure a correctly encoded input for manual input. (#352)

* Ensure a correctly encoded input for manual input.

* Test added.

Co-authored-by: Benedikt Moneke <Benedikt.Moneke@tu-darmstadt.de>

Author: BenediktBurger

src/instruments/abstract_instruments/comm/loopback_communicator.py

@@ -121,7 +121,7 @@ def read_raw(self, size=-1):
             else:
                 raise ValueError("Must read a positive value of characters.")
         else:
-            input_var = input("Desired Response: ")
+            input_var = input("Desired Response: ").encode("utf-8")
         return input_var
 
     def write_raw(self, msg):

tests/test_comm/test_loopback.py

@@ -116,10 +116,16 @@ def test_loopbackcomm_read_raw_size_invalid():
         comm.read_raw(size=-2)
 
 
+@mock.patch("builtins.input")
+def test_loopbackcomm_read_raw_stdin(mock_input):
+    mock_input.return_value = "Returned string."
+    comm = LoopbackCommunicator()
+    assert comm.read_raw() == b"Returned string."
+
+
 def test_loopbackcomm_write_raw():
     mock_stdout = mock.MagicMock()
     comm = LoopbackCommunicator(stdout=mock_stdout)
-
     comm.write_raw(b"mock")
     mock_stdout.write.assert_called_with(b"mock")