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