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"""Global database feature support policy.
Provides decorators to mark tests requiring specific feature support from the
target database.
External dialect test suites should subclass SuiteRequirements
to provide specific inclusion/exlusions.
"""
from . import exclusions
class Requirements(object):
def __init__(self, db, config):
self.db = db
self.config = config
class SuiteRequirements(Requirements):
@property
def create_table(self):
"""target platform can emit basic CreateTable DDL."""
return exclusions.open()
@property
def drop_table(self):
"""target platform can emit basic DropTable DDL."""
return exclusions.open()
@property
def foreign_keys(self):
"""Target database must support foreign keys."""
return exclusions.open()
@property
def self_referential_foreign_keys(self):
"""Target database must support self-referential foreign keys."""
return exclusions.open()
@property
def foreign_key_ddl(self):
"""Target database must support the DDL phrases for FOREIGN KEY."""
return exclusions.open()
@property
def named_constraints(self):
"""target database must support names for constraints."""
return exclusions.open()
@property
def autoincrement_insert(self):
"""target platform generates new surrogate integer primary key values
when insert() is executed, excluding the pk column."""
return exclusions.open()
@property
def returning(self):
"""target platform supports RETURNING."""
return exclusions.only_if(
lambda: self.config.db.dialect.implicit_returning,
"'returning' not supported by database"
)
@property
def denormalized_names(self):
"""Target database must have 'denormalized', i.e.
UPPERCASE as case insensitive names."""
return exclusions.skip_if(
lambda: not self.db.dialect.requires_name_normalize,
"Backend does not require denormalized names."
)
@property
def dbapi_lastrowid(self):
""""target platform includes a 'lastrowid' accessor on the DBAPI
cursor object.
"""
return exclusions.closed()
@property
def views(self):
"""Target database must support VIEWs."""
return exclusions.closed()
@property
def schemas(self):
"""Target database must support external schemas, and have one
named 'test_schema'."""
return exclusions.closed()
@property
def sequences(self):
"""Target database must support SEQUENCEs."""
return exclusions.only_if([
lambda: self.config.db.dialect.supports_sequences
], "no SEQUENCE support")
@property
def reflects_pk_names(self):
return exclusions.closed()
@property
def table_reflection(self):
return exclusions.open()
@property
def view_reflection(self):
return self.views
@property
def schema_reflection(self):
return self.schemas
@property
def primary_key_constraint_reflection(self):
return exclusions.open()
@property
def foreign_key_constraint_reflection(self):
return exclusions.open()
@property
def index_reflection(self):
return exclusions.open()
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