fixed test expecting an error in cerr, looking into json instead

Author: Klaim

micromamba/tests/helpers.py

@@ -707,3 +707,10 @@ def assert_state_file(state_file_path: Path, expected_state: dict):
         assert state[field_name] == expected_value, (
             f"Expected {field_name} to be {expected_value}, but got {state[field_name]}"
         )
+
+def find_message_in_json_logs(json_result, message_to_find):
+    for log_record in json_result["log_history"]:
+        if message_to_find in log_record["message"]:
+            return log_record
+
+    return None

micromamba/tests/test_create.py

@@ -365,18 +365,17 @@ def test_clone_conflicts_with_specs(tmp_home, tmp_root_prefix, tmp_path):
     env_name = "clone-conflict-specs"
     helpers.create("-n", "src-env-for-conflict", "xtensor", "--json", no_dry_run=True)
 
-    with pytest.raises(subprocess.CalledProcessError) as info:
-        helpers.create(
-            "--clone",
-            "src-env-for-conflict",
-            "-n",
-            env_name,
-            "xsimd",
-            "--json",
-            no_dry_run=True,
-        )
-    stderr = info.value.stderr.decode()
-    assert "Cannot use --clone together with package specs." in stderr
+    res = helpers.create(
+        "--clone",
+        "src-env-for-conflict",
+        "-n",
+        env_name,
+        "xsimd",
+        "--json",
+        no_dry_run=True,
+    )
+
+    assert find_message_in_json_logs(res, "Cannot use --clone together with package specs.") != None
 
 
 @pytest.mark.parametrize("shared_pkgs_dirs", [True], indirect=True)