discovery_client: When a python measurement starts discovery service, hide discovery service logs

ni_measurementlink_service/_internal/discovery_client.py

@@ -135,6 +135,7 @@ def register_measurement_service(
             _logger.error(
                 "Unable to register with discovery service. Possible reason: discovery service not running."
             )
+            return False
         except Exception:
             _logger.exception("Error in registering with discovery service.")
             return False
@@ -161,6 +162,7 @@ def unregister_service(self) -> bool:
                 _logger.info("Successfully unregistered with discovery service.")
             else:
                 _logger.info("Not registered with discovery service.")
+                return False
         except grpc.RpcError as e:
             if e.code() == grpc.StatusCode.UNAVAILABLE:
                 _logger.error(
@@ -173,6 +175,7 @@ def unregister_service(self) -> bool:
             _logger.error(
                 "Unable to unregister with discovery service. Possible reason: discovery service not running."
             )
+            return False
         except Exception:
             _logger.exception("Error in unregistering with discovery service.")
             return False
@@ -254,7 +257,12 @@ def _key_file_exists(key_file_path: pathlib.Path) -> bool:
 
 def _start_service(exe_file_path: pathlib.PurePath, key_file_path: pathlib.Path) -> None:
     """Starts the service at the specified path and wait for the service to get up and running."""
-    subprocess.Popen([exe_file_path], cwd=exe_file_path.parent)
+    subprocess.Popen(
+        [exe_file_path],
+        cwd=exe_file_path.parent,
+        stdout=subprocess.DEVNULL,
+        stderr=subprocess.DEVNULL,
+    )
     # After the execution of process, check for key file existence in the path
     # stop checking after 30 seconds have elapsed and throw error
     timeout_time = time.time() + _START_SERVICE_TIMEOUT

tests/unit/test_discovery_client.py

@@ -2,6 +2,7 @@
 """
 import json
 import pathlib
+import subprocess
 from typing import cast
 
 import pytest
@@ -76,19 +77,7 @@ def test___discovery_service_available___unregister_non_registered_service___unr
 ):
     unregistration_success_flag = discovery_client.unregister_service()
 
-    assert ~unregistration_success_flag  # False
-
-
-def test___discovery_service_unavailable___register_service_registration_failure(
-    discovery_client: DiscoveryClient,
-):
-    discovery_client.register_measurement_service(
-        _TEST_SERVICE_PORT, _TEST_SERVICE_INFO, _TEST_MEASUREMENT_INFO
-    )
-
-    unregistration_success_flag = discovery_client.unregister_service()
-
-    assert ~unregistration_success_flag  # False
+    assert not unregistration_success_flag
 
 
 def test___get_discovery_service_address___start_service_jit___returns_expected_value(
@@ -115,7 +104,12 @@ def test___get_discovery_service_address___start_service_jit___returns_expected_
 
     exe_file_path = temp_directory / _MOCK_REGISTRATION_FILE_CONTENT["discovery"]["path"]
 
-    mock_popen.assert_called_once_with([exe_file_path], cwd=exe_file_path.parent)
+    mock_popen.assert_called_once_with(
+        [exe_file_path],
+        cwd=exe_file_path.parent,
+        stdout=subprocess.DEVNULL,
+        stderr=subprocess.DEVNULL,
+    )
     assert _TEST_SERVICE_PORT in discovery_service_address
 
 
@@ -158,7 +152,35 @@ def test___start_discovery_service___key_file_exist_after_poll___service_start_s
 
     _start_service(exe_file_path, temp_discovery_key_file_path)
 
-    mock_popen.assert_called_once_with([exe_file_path], cwd=exe_file_path.parent)
+    mock_popen.assert_called_once_with(
+        [exe_file_path],
+        cwd=exe_file_path.parent,
+        stdout=subprocess.DEVNULL,
+        stderr=subprocess.DEVNULL,
+    )
+
+
+def test___discovery_service_exe_unavailable___register_service___registration_failure(
+    mocker: MockerFixture,
+    temp_discovery_key_file_path: pathlib.Path,
+    temp_registration_json_file_path: pathlib.Path,
+):
+    mocker.patch(
+        "ni_measurementlink_service._internal.discovery_client._get_key_file_path",
+        return_value=temp_discovery_key_file_path,
+    )
+    mocker.patch(
+        "ni_measurementlink_service._internal.discovery_client._get_registration_json_file_path",
+        return_value=temp_registration_json_file_path,
+    )
+    mocker.patch("subprocess.Popen", side_effect=FileNotFoundError)
+
+    discovery_client = DiscoveryClient()
+    registration_success_flag = discovery_client.register_measurement_service(
+        _TEST_SERVICE_PORT, _TEST_SERVICE_INFO, _TEST_MEASUREMENT_INFO
+    )
+
+    assert not registration_success_flag
 
 
 @pytest.fixture