make signature tests more verbose

Author: d-v-b

tests/test_api.py

@@ -1238,7 +1238,22 @@ def test_consistent_signatures(
     """
     base_sig = inspect.signature(a_func)
     test_sig = inspect.signature(b_func)
-    assert test_sig.parameters == base_sig.parameters
+    wrong: dict[str, list[object]] = {
+        "missing_from_test": [],
+        "missing_from_base": [],
+        "wrong_type": [],
+    }
+    for key, value in base_sig.parameters.items():
+        if key not in test_sig.parameters:
+            wrong["missing_from_test"].append((key, value))
+    for key, value in test_sig.parameters.items():
+        if key not in base_sig.parameters:
+            wrong["missing_from_base"].append((key, value))
+        if base_sig.parameters[key] != value:
+            wrong["wrong_type"].append({key: {"test": value, "base": base_sig.parameters[key]}})
+    assert wrong["missing_from_base"] == []
+    assert wrong["missing_from_test"] == []
+    assert wrong["wrong_type"] == []
 
 
 def test_api_exports() -> None:

tests/test_array.py

@@ -998,6 +998,7 @@ def test_chunks_and_shards() -> None:
 
 
 @pytest.mark.parametrize("store", ["memory"], indirect=True)
+@pytest.mark.filterwarnings("ignore::zarr.core.dtype.common.UnstableSpecificationWarning")
 @pytest.mark.parametrize(
     ("dtype", "fill_value_expected"), [("<U4", ""), ("<S4", b""), ("i", 0), ("f", 0.0)]
 )

tests/test_group.py

@@ -1547,7 +1547,22 @@ def test_consistent_signatures(
     """
     base_sig = inspect.signature(a_func)
     test_sig = inspect.signature(b_func)
-    assert test_sig.parameters == base_sig.parameters
+    wrong: dict[str, list[object]] = {
+        "missing_from_test": [],
+        "missing_from_base": [],
+        "wrong_type": [],
+    }
+    for key, value in base_sig.parameters.items():
+        if key not in test_sig.parameters:
+            wrong["missing_from_test"].append((key, value))
+    for key, value in test_sig.parameters.items():
+        if key not in base_sig.parameters:
+            wrong["missing_from_base"].append((key, value))
+        if base_sig.parameters[key] != value:
+            wrong["wrong_type"].append({key: {"test": value, "base": base_sig.parameters[key]}})
+    assert wrong["missing_from_base"] == []
+    assert wrong["missing_from_test"] == []
+    assert wrong["wrong_type"] == []
 
 
 @pytest.mark.parametrize("store", ["memory"], indirect=True)