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.venv2/Lib/site-packages/alembic/testing/requirements.py

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+from sqlalchemy.testing.requirements import Requirements
+
+from alembic import util
+from alembic.util import sqla_compat
+from ..testing import exclusions
+
+
+class SuiteRequirements(Requirements):
+    @property
+    def schemas(self):
+        """Target database must support external schemas, and have one
+        named 'test_schema'."""
+
+        return exclusions.open()
+
+    @property
+    def autocommit_isolation(self):
+        """target database should support 'AUTOCOMMIT' isolation level"""
+
+        return exclusions.closed()
+
+    @property
+    def materialized_views(self):
+        """needed for sqlalchemy compat"""
+        return exclusions.closed()
+
+    @property
+    def unique_constraint_reflection(self):
+        def doesnt_have_check_uq_constraints(config):
+            from sqlalchemy import inspect
+
+            insp = inspect(config.db)
+            try:
+                insp.get_unique_constraints("x")
+            except NotImplementedError:
+                return True
+            except TypeError:
+                return True
+            except Exception:
+                pass
+            return False
+
+        return exclusions.skip_if(doesnt_have_check_uq_constraints)
+
+    @property
+    def sequences(self):
+        """Target database must support SEQUENCEs."""
+
+        return exclusions.only_if(
+            [lambda config: config.db.dialect.supports_sequences],
+            "no sequence support",
+        )
+
+    @property
+    def foreign_key_match(self):
+        return exclusions.open()
+
+    @property
+    def foreign_key_constraint_reflection(self):
+        return exclusions.open()
+
+    @property
+    def check_constraints_w_enforcement(self):
+        """Target database must support check constraints
+        and also enforce them."""
+
+        return exclusions.open()
+
+    @property
+    def reflects_pk_names(self):
+        return exclusions.closed()
+
+    @property
+    def reflects_fk_options(self):
+        return exclusions.closed()
+
+    @property
+    def sqlalchemy_14(self):
+        return exclusions.skip_if(
+            lambda config: not util.sqla_14,
+            "SQLAlchemy 1.4 or greater required",
+        )
+
+    @property
+    def sqlalchemy_1x(self):
+        return exclusions.skip_if(
+            lambda config: util.sqla_2,
+            "SQLAlchemy 1.x test",
+        )
+
+    @property
+    def sqlalchemy_2(self):
+        return exclusions.skip_if(
+            lambda config: not util.sqla_2,
+            "SQLAlchemy 2.x test",
+        )
+
+    @property
+    def asyncio(self):
+        def go(config):
+            try:
+                import greenlet  # noqa: F401
+            except ImportError:
+                return False
+            else:
+                return True
+
+        return self.sqlalchemy_14 + exclusions.only_if(go)
+
+    @property
+    def comments(self):
+        return exclusions.only_if(
+            lambda config: config.db.dialect.supports_comments
+        )
+
+    @property
+    def alter_column(self):
+        return exclusions.open()
+
+    @property
+    def computed_columns(self):
+        return exclusions.closed()
+
+    @property
+    def computed_columns_api(self):
+        return exclusions.only_if(
+            exclusions.BooleanPredicate(sqla_compat.has_computed)
+        )
+
+    @property
+    def computed_reflects_normally(self):
+        return exclusions.only_if(
+            exclusions.BooleanPredicate(sqla_compat.has_computed_reflection)
+        )
+
+    @property
+    def computed_reflects_as_server_default(self):
+        return exclusions.closed()
+
+    @property
+    def computed_doesnt_reflect_as_server_default(self):
+        return exclusions.closed()
+
+    @property
+    def autoincrement_on_composite_pk(self):
+        return exclusions.closed()
+
+    @property
+    def fk_ondelete_is_reflected(self):
+        return exclusions.closed()
+
+    @property
+    def fk_onupdate_is_reflected(self):
+        return exclusions.closed()
+
+    @property
+    def fk_onupdate(self):
+        return exclusions.open()
+
+    @property
+    def fk_ondelete_restrict(self):
+        return exclusions.open()
+
+    @property
+    def fk_onupdate_restrict(self):
+        return exclusions.open()
+
+    @property
+    def fk_ondelete_noaction(self):
+        return exclusions.open()
+
+    @property
+    def fk_initially(self):
+        return exclusions.closed()
+
+    @property
+    def fk_deferrable(self):
+        return exclusions.closed()
+
+    @property
+    def fk_deferrable_is_reflected(self):
+        return exclusions.closed()
+
+    @property
+    def fk_names(self):
+        return exclusions.open()
+
+    @property
+    def integer_subtype_comparisons(self):
+        return exclusions.open()
+
+    @property
+    def no_name_normalize(self):
+        return exclusions.skip_if(
+            lambda config: config.db.dialect.requires_name_normalize
+        )
+
+    @property
+    def identity_columns(self):
+        return exclusions.closed()
+
+    @property
+    def identity_columns_alter(self):
+        return exclusions.closed()
+
+    @property
+    def identity_columns_api(self):
+        return exclusions.only_if(
+            exclusions.BooleanPredicate(sqla_compat.has_identity)
+        )