Forward incoming error when decoding fails (#36)

qiskit_transpiler_service/wrappers/base.py

@@ -180,18 +180,22 @@ def _raise_transpiler_error_and_log(msg: str):
 
 
 def _get_error_msg_from_response(exc: requests.exceptions.HTTPError):
-    resp = exc.response.json()
-    detail = resp.get("detail")
-    # Default message
-    msg = "Internal error."
-
-    if isinstance(detail, str):
-        msg = detail
-    elif isinstance(detail, list):
-        detail_input = detail[0]["input"]
-        detail_msg = detail[0]["msg"]
-
-        if detail_input and detail_msg:
-            msg = f"Wrong input '{detail_input}'. {detail_msg}"
-
+    try:
+        resp = exc.response.json()
+        detail = resp.get("detail")
+        # Default message
+        msg = "Internal error."
+
+        if isinstance(detail, str):
+            msg = detail
+        elif isinstance(detail, list):
+            detail_input = detail[0]["input"]
+            detail_msg = detail[0]["msg"]
+
+            if detail_input and detail_msg:
+                msg = f"Wrong input '{detail_input}'. {detail_msg}"
+    except Exception:
+        # If something fails decoding the error
+        # just show the incoming error
+        msg = f"Internal error: {str(exc)}"
     return msg

tests/ai/test_clifford_ai.py

@@ -67,19 +67,16 @@ def test_clifford_wrong_token(random_circuit_transpiled, backend, caplog):
 
 
 @pytest.mark.disable_monkeypatch
-def test_clifford_wrong_url(random_circuit_transpiled, backend):
+def test_clifford_wrong_url(random_circuit_transpiled, backend, caplog):
     ai_optimize_cliff = PassManager(
         [
             CollectCliffords(),
             AICliffordSynthesis(backend_name=backend, base_url="https://ibm.com/"),
         ]
     )
-    try:
-        ai_optimized_circuit = ai_optimize_cliff.run(random_circuit_transpiled)
-        pytest.fail("Error expected")
-    except Exception as e:
-        assert "Expecting value: line 1 column 1 (char 0)" in str(e)
-        assert type(e).__name__ == "JSONDecodeError"
+    ai_optimized_circuit = ai_optimize_cliff.run(random_circuit_transpiled)
+    assert "Internal error: 404 Client Error:" in caplog.text
+    assert "Keeping the original circuit" in caplog.text
 
 
 @pytest.mark.disable_monkeypatch

tests/ai/test_routing_ai.py

@@ -87,8 +87,8 @@ def test_routing_wrong_url(qv_circ, backend):
         ai_optimized_circuit = ai_optimize_lf.run(qv_circ)
         pytest.fail("Error expected")
     except Exception as e:
-        assert "Expecting value: line 1 column 1 (char 0)" in str(e)
-        assert type(e).__name__ == "JSONDecodeError"
+        assert "Internal error: 404 Client Error: Not Found for url" in str(e)
+        assert type(e).__name__ == "TranspilerError"
 
 
 @pytest.mark.disable_monkeypatch

tests/test_transpiler_service.py

@@ -87,6 +87,7 @@ def test_rand_circ_cmap_routing(
 ):
     random_circ = random_circuit(5, depth=3, seed=42).decompose(reps=3)
 
+    coupling_map.extend([item[::-1] for item in coupling_map])
     cloud_transpiler_service = TranspilerService(
         coupling_map=coupling_map,
         ai=ai,
@@ -175,6 +176,9 @@ def test_transpile_non_valid_backend():
         )
 
 
+@pytest.mark.skip(
+    "Service accepts now 1e6 gates. Takes too much time to create that circuit."
+)
 def test_transpile_exceed_circuit_size():
     circuit = EfficientSU2(120, entanglement="full", reps=5).decompose()
     transpiler_service = TranspilerService(
@@ -239,8 +243,11 @@ def test_transpile_wrong_url():
         transpiler_service.run(circuit)
         pytest.fail("Error expected")
     except Exception as e:
-        assert "Expecting value: line 1 column 1 (char 0)" in str(e)
-        assert type(e).__name__ == "JSONDecodeError"
+        assert (
+            "Internal error: 404 Client Error: Not Found for url: https://www.ibm.com/transpile"
+            in str(e)
+        )
+        assert type(e).__name__ == "TranspilerError"
 
 
 @pytest.mark.disable_monkeypatch