Test SQL target capabilities info

tests/core/targets/test_target_sql.py

@@ -0,0 +1,50 @@
+from __future__ import annotations
+
+import typing as t
+
+import pytest
+
+from singer_sdk.helpers.capabilities import CapabilitiesEnum, TargetCapabilities
+from singer_sdk.target_base import SQLTarget
+
+
+class SQLTargetMock(SQLTarget):
+    name = "sql-target-mock"
+
+    def __init_subclass__(
+        cls,
+        *,
+        capabilities: t.Iterable[CapabilitiesEnum],
+        **kwargs: t.Any,
+    ):
+        super().__init_subclass__(**kwargs)
+        cls.capabilities = [*capabilities]
+        cls.config_jsonschema = {"properties": {}}
+
+
+@pytest.mark.parametrize(
+    "capabilities,expected_settings",
+    [
+        pytest.param([], set(), id="no capabilities"),
+        pytest.param(
+            [TargetCapabilities.TARGET_SCHEMA],
+            {"default_target_schema"},
+            id="default schema",
+        ),
+        pytest.param(
+            [TargetCapabilities.HARD_DELETE],
+            {"hard_delete"},
+            id="hard delete",
+        ),
+    ],
+)
+def test_target_about_info(
+    capabilities: list[CapabilitiesEnum],
+    expected_settings: set[str],
+):
+    class MyTarget(SQLTargetMock, capabilities=capabilities):
+        pass
+
+    about = MyTarget._get_about_info()
+    default_settings = {"add_record_metadata", "load_method"}
+    assert set(about.settings["properties"]) == expected_settings | default_settings