Pydantic v2 upgrade

README.md

@@ -83,3 +83,5 @@ You can customize name and location of the fixture, but you will need to include
       identifier: my_fixture_name # optional; default = interface_tester
 ```
 
+## Upgrading from v1
+As `pytest-interface-tester` v2 is using `pydantic` v2 that introduces breaking changes to their API, you might need to adjust your tested charm to also support v2. See [migration guide](https://docs.pydantic.dev/latest/migration/) for more information.

interface_tester/collector.py

@@ -105,11 +105,6 @@ def load_schema_module(schema_path: Path) -> types.ModuleType:
     if module_name in sys.modules:
         del sys.modules[module_name]
 
-    # Otherwise we'll get an error when we re-run @validator
-    # fixme: is there a better way to do this?
-    logger.debug("Clearing pydantic.class_validators._FUNCS")
-    pydantic.class_validators._FUNCS.clear()  # noqa
-
     try:
         module = importlib.import_module(module_name)
     except ImportError:

interface_tester/interface_test.py

@@ -283,14 +283,14 @@ def assert_schema_valid(self, schema: Optional["DataBagSchema"] = None):
         errors = []
         for relation in self._relations:
             try:
-                databag_schema.validate(
+                databag_schema.model_validate(
                     {
                         "unit": relation.local_unit_data,
                         "app": relation.local_app_data,
                     }
                 )
             except ValidationError as e:
-                errors.append(e.args[0])
+                errors.append(e.errors()[0])
         if errors:
             raise SchemaValidationError(errors)
 

pyproject.toml

@@ -11,7 +11,7 @@ build-backend = "setuptools.build_meta"
 [project]
 name = "pytest-interface-tester"
 
-version = "1.0.7"
+version = "2.0.0"
 authors = [
     { name = "Pietro Pasotti", email = "[email protected]" },
 ]
@@ -20,7 +20,7 @@ license.text = "Apache-2.0"
 keywords = ["juju", "relation interfaces"]
 
 dependencies = [
-    "pydantic>= 1.10.7, <2",
+    "pydantic>=2",
     "typer==0.7.0",
     "ops-scenario>=5.2",
     "pytest"

tests/unit/test_collect_schemas.py

@@ -15,7 +15,7 @@ def test_load_schema_module(tmp_path):
     pth.write_text(
         dedent(
             """
-FOO = 1
+FOO: int = 1
         """
         )
     )
@@ -35,7 +35,7 @@ def test_collect_schemas(tmp_path):
             """from interface_tester.schema_base import DataBagSchema
 
 class RequirerSchema(DataBagSchema):
-    foo = 1"""
+    foo: int = 1"""
         )
     )
 
@@ -54,7 +54,7 @@ def test_collect_schemas_multiple(tmp_path):
             """from interface_tester.schema_base import DataBagSchema
 
 class RequirerSchema(DataBagSchema):
-    foo = 1"""
+    foo: int = 1"""
         )
     )
 
@@ -65,13 +65,13 @@ class RequirerSchema(DataBagSchema):
             """from interface_tester.schema_base import DataBagSchema
 
 class RequirerSchema(DataBagSchema):
-    foo = 2"""
+    foo: int = 2"""
         )
     )
 
     tests = collect_tests(root)
-    assert tests["mytestinterfacea"]["v0"]["requirer"]["schema"].__fields__["foo"].default == 1
-    assert tests["mytestinterfaceb"]["v0"]["requirer"]["schema"].__fields__["foo"].default == 2
+    assert tests["mytestinterfacea"]["v0"]["requirer"]["schema"].model_fields["foo"].default == 1
+    assert tests["mytestinterfaceb"]["v0"]["requirer"]["schema"].model_fields["foo"].default == 2
 
 
 def test_collect_invalid_schemas(tmp_path):
@@ -84,7 +84,7 @@ def test_collect_invalid_schemas(tmp_path):
         dedent(
             """from interface_tester.schema_base import DataBagSchema
 class ProviderSchema(DataBagSchema):
-    foo = 2"""
+    foo: int = 2"""
         )
     )
 
@@ -95,9 +95,9 @@ class ProviderSchema(DataBagSchema):
 @pytest.mark.parametrize(
     "schema_source, schema_name",
     (
-        (dedent("""Foo2=1"""), "Foo2"),
-        (dedent("""Bar='baz'"""), "Bar"),
-        (dedent("""Baz=[1,2,3]"""), "Baz"),
+        (dedent("""Foo2: int=1"""), "Foo2"),
+        (dedent("""Bar: str='baz'"""), "Bar"),
+        (dedent("""Baz: list=[1,2,3]"""), "Baz"),
     ),
 )
 def test_get_schema_from_module_wrong_type(tmp_path, schema_source, schema_name):
@@ -114,7 +114,7 @@ def test_get_schema_from_module_wrong_type(tmp_path, schema_source, schema_name)
 @pytest.mark.parametrize("schema_name", ("foo", "bar", "baz"))
 def test_get_schema_from_module_bad_name(tmp_path, schema_name):
     pth = Path(tmp_path) / "bar3.py"
-    pth.write_text("dead='beef'")
+    pth.write_text("dead: str='beef'")
     module = load_schema_module(pth)
 
     # fails because it's not found in the module