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This commit is contained in:
Øyvind Almelid
2010-05-07 17:33:49 +00:00
parent c7c7498f19
commit cae7e001e3
127 changed files with 57530 additions and 0 deletions
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sqlalchemy/test/requires.py Normal file
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"""Global database feature support policy.
Provides decorators to mark tests requiring specific feature support from the
target database.
"""
from testing import \
_block_unconditionally as no_support, \
_chain_decorators_on, \
exclude, \
emits_warning_on,\
skip_if,\
fails_on
import testing
import sys
def deferrable_constraints(fn):
"""Target database must support derferable constraints."""
return _chain_decorators_on(
fn,
no_support('firebird', 'not supported by database'),
no_support('mysql', 'not supported by database'),
no_support('mssql', 'not supported by database'),
)
def foreign_keys(fn):
"""Target database must support foreign keys."""
return _chain_decorators_on(
fn,
no_support('sqlite', 'not supported by database'),
)
def unbounded_varchar(fn):
"""Target database must support VARCHAR with no length"""
return _chain_decorators_on(
fn,
no_support('firebird', 'not supported by database'),
no_support('oracle', 'not supported by database'),
no_support('mysql', 'not supported by database'),
)
def boolean_col_expressions(fn):
"""Target database must support boolean expressions as columns"""
return _chain_decorators_on(
fn,
no_support('firebird', 'not supported by database'),
no_support('oracle', 'not supported by database'),
no_support('mssql', 'not supported by database'),
no_support('sybase', 'not supported by database'),
no_support('maxdb', 'FIXME: verify not supported by database'),
)
def identity(fn):
"""Target database must support GENERATED AS IDENTITY or a facsimile.
Includes GENERATED AS IDENTITY, AUTOINCREMENT, AUTO_INCREMENT, or other
column DDL feature that fills in a DB-generated identifier at INSERT-time
without requiring pre-execution of a SEQUENCE or other artifact.
"""
return _chain_decorators_on(
fn,
no_support('firebird', 'not supported by database'),
no_support('oracle', 'not supported by database'),
no_support('postgresql', 'not supported by database'),
no_support('sybase', 'not supported by database'),
)
def independent_cursors(fn):
"""Target must support simultaneous, independent database cursors on a single connection."""
return _chain_decorators_on(
fn,
no_support('mssql+pyodbc', 'no driver support'),
no_support('mssql+mxodbc', 'no driver support'),
)
def independent_connections(fn):
"""Target must support simultaneous, independent database connections."""
# This is also true of some configurations of UnixODBC and probably win32
# ODBC as well.
return _chain_decorators_on(
fn,
no_support('sqlite', 'no driver support'),
exclude('mssql', '<', (9, 0, 0),
'SQL Server 2005+ is required for independent connections'),
)
def row_triggers(fn):
"""Target must support standard statement-running EACH ROW triggers."""
return _chain_decorators_on(
fn,
# no access to same table
no_support('mysql', 'requires SUPER priv'),
exclude('mysql', '<', (5, 0, 10), 'not supported by database'),
# huh? TODO: implement triggers for PG tests, remove this
no_support('postgresql', 'PG triggers need to be implemented for tests'),
)
def correlated_outer_joins(fn):
"""Target must support an outer join to a subquery which correlates to the parent."""
return _chain_decorators_on(
fn,
no_support('oracle', 'Raises "ORA-01799: a column may not be outer-joined to a subquery"')
)
def savepoints(fn):
"""Target database must support savepoints."""
return _chain_decorators_on(
fn,
emits_warning_on('mssql', 'Savepoint support in mssql is experimental and may lead to data loss.'),
no_support('access', 'not supported by database'),
no_support('sqlite', 'not supported by database'),
no_support('sybase', 'FIXME: guessing, needs confirmation'),
exclude('mysql', '<', (5, 0, 3), 'not supported by database'),
)
def denormalized_names(fn):
"""Target database must have 'denormalized', i.e. UPPERCASE as case insensitive names."""
return skip_if(
lambda: not testing.db.dialect.requires_name_normalize,
"Backend does not require denomralized names."
)(fn)
def schemas(fn):
"""Target database must support external schemas, and have one named 'test_schema'."""
return _chain_decorators_on(
fn,
no_support('sqlite', 'no schema support'),
no_support('firebird', 'no schema support')
)
def sequences(fn):
"""Target database must support SEQUENCEs."""
return _chain_decorators_on(
fn,
no_support('access', 'no SEQUENCE support'),
no_support('mssql', 'no SEQUENCE support'),
no_support('mysql', 'no SEQUENCE support'),
no_support('sqlite', 'no SEQUENCE support'),
no_support('sybase', 'no SEQUENCE support'),
)
def subqueries(fn):
"""Target database must support subqueries."""
return _chain_decorators_on(
fn,
exclude('mysql', '<', (4, 1, 1), 'no subquery support'),
)
def intersect(fn):
"""Target database must support INTERSECT or equivlaent."""
return _chain_decorators_on(
fn,
fails_on('firebird', 'no support for INTERSECT'),
fails_on('mysql', 'no support for INTERSECT'),
fails_on('sybase', 'no support for INTERSECT'),
)
def except_(fn):
"""Target database must support EXCEPT or equivlaent (i.e. MINUS)."""
return _chain_decorators_on(
fn,
fails_on('firebird', 'no support for EXCEPT'),
fails_on('mysql', 'no support for EXCEPT'),
fails_on('sybase', 'no support for EXCEPT'),
)
def offset(fn):
"""Target database must support some method of adding OFFSET or equivalent to a result set."""
return _chain_decorators_on(
fn,
fails_on('sybase', 'no support for OFFSET or equivalent'),
)
def returning(fn):
return _chain_decorators_on(
fn,
no_support('access', 'not supported by database'),
no_support('sqlite', 'not supported by database'),
no_support('mysql', 'not supported by database'),
no_support('maxdb', 'not supported by database'),
no_support('sybase', 'not supported by database'),
no_support('informix', 'not supported by database'),
)
def two_phase_transactions(fn):
"""Target database must support two-phase transactions."""
return _chain_decorators_on(
fn,
no_support('access', 'not supported by database'),
no_support('firebird', 'no SA implementation'),
no_support('maxdb', 'not supported by database'),
no_support('mssql', 'FIXME: guessing, needs confirmation'),
no_support('oracle', 'no SA implementation'),
no_support('sqlite', 'not supported by database'),
no_support('sybase', 'FIXME: guessing, needs confirmation'),
no_support('postgresql+zxjdbc', 'FIXME: JDBC driver confuses the transaction state, may '
'need separate XA implementation'),
exclude('mysql', '<', (5, 0, 3), 'not supported by database'),
)
def unicode_connections(fn):
"""Target driver must support some encoding of Unicode across the wire."""
# TODO: expand to exclude MySQLdb versions w/ broken unicode
return _chain_decorators_on(
fn,
exclude('mysql', '<', (4, 1, 1), 'no unicode connection support'),
)
def unicode_ddl(fn):
"""Target driver must support some encoding of Unicode across the wire."""
# TODO: expand to exclude MySQLdb versions w/ broken unicode
return _chain_decorators_on(
fn,
no_support('maxdb', 'database support flakey'),
no_support('oracle', 'FIXME: no support in database?'),
no_support('sybase', 'FIXME: guessing, needs confirmation'),
no_support('mssql+pymssql', 'no FreeTDS support'),
exclude('mysql', '<', (4, 1, 1), 'no unicode connection support'),
)
def sane_rowcount(fn):
return _chain_decorators_on(
fn,
skip_if(lambda: not testing.db.dialect.supports_sane_rowcount)
)
def python2(fn):
return _chain_decorators_on(
fn,
skip_if(
lambda: sys.version_info >= (3,),
"Python version 2.xx is required."
)
)
def _has_sqlite():
from sqlalchemy import create_engine
try:
e = create_engine('sqlite://')
return True
except ImportError:
return False
def sqlite(fn):
return _chain_decorators_on(
fn,
skip_if(lambda: not _has_sqlite())
)