tests: handle case of acceptance-test-config.yml with no valid test cases

airbyte_cdk/test/entrypoint_wrapper.py

@@ -82,6 +82,10 @@ def records(self) -> List[AirbyteMessage]:
     def state_messages(self) -> List[AirbyteMessage]:
         return self._get_message_by_types([Type.STATE])
 
+    @property
+    def spec_messages(self) -> List[AirbyteMessage]:
+        return self._get_message_by_types([Type.SPEC])
+
     @property
     def connection_status_messages(self) -> List[AirbyteMessage]:
         return self._get_message_by_types([Type.CONNECTION_STATUS])

airbyte_cdk/test/standard_tests/_job_runner.py

@@ -56,12 +56,15 @@ def spec(self, logger: logging.Logger) -> Any:
 
 def run_test_job(
     connector: IConnector | type[IConnector] | Callable[[], IConnector],
-    verb: Literal["read", "check", "discover"],
-    test_scenario: ConnectorTestScenario,
+    verb: Literal["spec", "read", "check", "discover"],
     *,
+    test_scenario: ConnectorTestScenario | None = None,
     catalog: ConfiguredAirbyteCatalog | dict[str, Any] | None = None,
 ) -> entrypoint_wrapper.EntrypointOutput:
     """Run a test scenario from provided CLI args and return the result."""
+    # Use default (empty) scenario if not provided:
+    test_scenario = test_scenario or ConnectorTestScenario()
+
     if not connector:
         raise ValueError("Connector is required")
 
@@ -81,14 +84,14 @@ def run_test_job(
         )
 
     args: list[str] = [verb]
-    if test_scenario.config_path:
-        args += ["--config", str(test_scenario.config_path)]
-    elif test_scenario.config_dict:
+    config_dict = test_scenario.get_config_dict(empty_if_missing=True)
+    if config_dict and verb != "spec":
+        # Write the config to a temp json file and pass the path to the file as an argument.
         config_path = (
             Path(tempfile.gettempdir()) / "airbyte-test" / f"temp_config_{uuid.uuid4().hex}.json"
         )
         config_path.parent.mkdir(parents=True, exist_ok=True)
-        config_path.write_text(orjson.dumps(test_scenario.config_dict).decode())
+        config_path.write_text(orjson.dumps(config_dict).decode())
         args += ["--config", str(config_path)]
 
     catalog_path: Path | None = None

airbyte_cdk/test/standard_tests/connector_base.py

@@ -89,7 +89,7 @@ def get_test_class_dir(cls) -> Path:
     @classmethod
     def create_connector(
         cls,
-        scenario: ConnectorTestScenario,
+        scenario: ConnectorTestScenario | None,
     ) -> IConnector:
         """Instantiate the connector class."""
         connector = cls.connector  # type: ignore
@@ -147,28 +147,35 @@ def get_scenarios(
         This has to be a separate function because pytest does not allow
         parametrization of fixtures with arguments from the test class itself.
         """
-        category = "connection"
+        categories = ["connection", "spec"]
         all_tests_config = yaml.safe_load(cls.acceptance_test_config_path.read_text())
         if "acceptance_tests" not in all_tests_config:
             raise ValueError(
                 f"Acceptance tests config not found in {cls.acceptance_test_config_path}."
                 f" Found only: {str(all_tests_config)}."
             )
-        if category not in all_tests_config["acceptance_tests"]:
-            return []
-        if "tests" not in all_tests_config["acceptance_tests"][category]:
-            raise ValueError(f"No tests found for category {category}")
-
-        tests_scenarios = [
-            ConnectorTestScenario.model_validate(test)
-            for test in all_tests_config["acceptance_tests"][category]["tests"]
-            if "iam_role" not in test["config_path"]
-        ]
+
+        test_scenarios: list[ConnectorTestScenario] = []
+        for category in categories:
+            if (
+                category not in all_tests_config["acceptance_tests"]
+                or "tests" not in all_tests_config["acceptance_tests"][category]
+            ):
+                continue
+
+            test_scenarios.extend(
+                [
+                    ConnectorTestScenario.model_validate(test)
+                    for test in all_tests_config["acceptance_tests"][category]["tests"]
+                    if "config_path" in test and "iam_role" not in test["config_path"]
+                ]
+            )
+
         connector_root = cls.get_connector_root_dir().absolute()
-        for test in tests_scenarios:
+        for test in test_scenarios:
             if test.config_path:
                 test.config_path = connector_root / test.config_path
             if test.configured_catalog_path:
                 test.configured_catalog_path = connector_root / test.configured_catalog_path
 
-        return tests_scenarios
+        return test_scenarios

airbyte_cdk/test/standard_tests/declarative_sources.py

@@ -64,7 +64,7 @@ def components_py_path(cls) -> Path | None:
     @classmethod
     def create_connector(
         cls,
-        scenario: ConnectorTestScenario,
+        scenario: ConnectorTestScenario | None,
     ) -> IConnector:
         """Create a connector scenario for the test suite.
 
@@ -73,9 +73,13 @@ def create_connector(
 
         Subclasses should not need to override this method.
         """
-        config: dict[str, Any] = scenario.get_config_dict()
-
+        scenario = scenario or ConnectorTestScenario()  # Use default (empty) scenario if None
         manifest_dict = yaml.safe_load(cls.manifest_yaml_path.read_text())
+        config = {
+            "__injected_manifest": manifest_dict,
+        }
+        config.update(scenario.get_config_dict(empty_if_missing=True))
+
         if cls.components_py_path and cls.components_py_path.exists():
             os.environ["AIRBYTE_ENABLE_UNSAFE_CODE"] = "true"
             config["__injected_components_py"] = cls.components_py_path.read_text()

airbyte_cdk/test/standard_tests/models/scenario.py

@@ -43,18 +43,29 @@ class AcceptanceTestFileTypes(BaseModel):
     file_types: AcceptanceTestFileTypes | None = None
     status: Literal["succeed", "failed"] | None = None
 
-    def get_config_dict(self) -> dict[str, Any]:
+    def get_config_dict(
+        self,
+        *,
+        empty_if_missing: bool,
+    ) -> dict[str, Any]:
         """Return the config dictionary.
 
         If a config dictionary has already been loaded, return it. Otherwise, load
         the config file and return the dictionary.
+
+        If `self.config_dict` and `self.config_path` are both `None`:
+        - return an empty dictionary if `empty_if_missing` is True
+        - raise a ValueError if `empty_if_missing` is False
         """
-        if self.config_dict:
+        if self.config_dict is not None:
             return self.config_dict
 
-        if self.config_path:
+        if self.config_path is not None:
             return cast(dict[str, Any], yaml.safe_load(self.config_path.read_text()))
 
+        if empty_if_missing:
+            return {}
+
         raise ValueError("No config dictionary or path provided.")
 
     @property

airbyte_cdk/test/standard_tests/source_base.py

@@ -64,6 +64,30 @@ def test_discover(
             test_scenario=scenario,
         )
 
+    def test_spec(self) -> None:
+        """Standard test for `spec`.
+
+        This test does not require a `scenario` input, since `spec`
+        does not require any inputs.
+
+        We assume `spec` should always succeed and it should always generate
+        a valid `SPEC` message.
+
+        Note: the parsing of messages by type also implicitly validates that
+        the generated `SPEC` message is valid JSON.
+        """
+        result = run_test_job(
+            verb="spec",
+            test_scenario=None,
+            connector=self.create_connector(scenario=None),
+        )
+        # If an error occurs, it will be raised above.
+
+        assert len(result.spec_messages) == 1, (
+            "Expected exactly 1 spec message but got {len(result.spec_messages)}",
+            result.errors,
+        )
+
     def test_basic_read(
         self,
         scenario: ConnectorTestScenario,