[fix] [quera] Follow-up to PR#2528 which unintentionally broke the Python support (#2555)

* Restore the server helper library target.
* Also, remove the redundant code for mock qpu which was not being used.

Signed-off-by: Pradnya Khalate <[email protected]>

Author: khalatepradnya

python/tests/backends/test_QuEra.py

@@ -10,37 +10,17 @@
 from cudaq.operator import *
 import json
 import numpy as np
-import os
 import pytest
-from multiprocessing import Process
-from network_utils import check_server_connection
-
-try:
-    from utils.mock_qpu.quera import startServer
-except:
-    print("Mock qpu not available, skipping QuEra tests.")
-    pytest.skip("Mock qpu not available.", allow_module_level=True)
-
-# Define the port for the mock server
-port = 62444
 
 
 @pytest.fixture(scope="session", autouse=True)
-def startUpMockServer():
-    # NOTE: Credentials can be set with AWS CLI
-    cudaq.set_target('quera')
-    # Launch the Mock Server
-    p = Process(target=startServer, args=(port,))
-    p.start()
-    if not check_server_connection(port):
-        p.terminate()
-        pytest.exit("Mock server did not start in time, skipping tests.",
-                    returncode=1)
+def do_something():
+    cudaq.set_target("quera")
     yield "Running the tests."
-    p.terminate()
+    cudaq.reset_target()
 
 
-@pytest.mark.skip(reason="Amazon Braket credentials required")
+@pytest.mark.skip(reason="Amazon Braket must be installed")
 def test_JSON_payload():
     '''
     Test based on https://docs.aws.amazon.com/braket/latest/developerguide/braket-quera-submitting-analog-program-aquila.html
@@ -88,7 +68,7 @@ def test_JSON_payload():
                                                 json.dumps(input))
 
 
-@pytest.mark.skip(reason="Braket credentials required")
+@pytest.mark.skip(reason="Amazon Braket credentials required")
 def test_ahs_hello():
     '''
     Test based on

runtime/cudaq/platform/quera/CMakeLists.txt

@@ -31,3 +31,12 @@ target_link_libraries(${LIBRARY_NAME}
 install(TARGETS ${LIBRARY_NAME} DESTINATION lib)
 
 add_target_config(quera)
+
+add_library(cudaq-serverhelper-quera SHARED QuEraExecutor.cpp QuEraServerHelper.cpp)
+target_link_libraries(cudaq-serverhelper-quera
+  PUBLIC 
+    cudaq-serverhelper-braket
+    cudaq-common 
+    fmt::fmt-header-only 
+)
+install(TARGETS cudaq-serverhelper-quera DESTINATION lib)

utils/mock_qpu/__init__.py

@@ -12,4 +12,3 @@
 from .ionq import *
 from .iqm import *
 from .quantinuum import *
-from .quera import *