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"""Test op functions against MSSQL."""
from alembic.testing.fixtures import TestBase
from sqlalchemy import Integer, Column
from alembic import op, command, util
from alembic.testing import eq_, assert_raises_message
from alembic.testing.fixtures import capture_context_buffer, op_fixture
from alembic.testing.env import staging_env, _no_sql_testing_config, \
three_rev_fixture, clear_staging_env
from alembic.testing import config
class FullEnvironmentTests(TestBase):
@classmethod
def setup_class(cls):
staging_env()
cls.cfg = cfg = _no_sql_testing_config("mssql")
cls.a, cls.b, cls.c = \
three_rev_fixture(cfg)
@classmethod
def teardown_class(cls):
clear_staging_env()
def test_begin_commit(self):
with capture_context_buffer(transactional_ddl=True) as buf:
command.upgrade(self.cfg, self.a, sql=True)
assert "BEGIN TRANSACTION;" in buf.getvalue()
# ensure ends in COMMIT; GO
eq_(
[x for x in buf.getvalue().splitlines() if x][-2:],
['COMMIT;', 'GO']
)
def test_batch_separator_default(self):
with capture_context_buffer() as buf:
command.upgrade(self.cfg, self.a, sql=True)
assert "GO" in buf.getvalue()
def test_batch_separator_custom(self):
with capture_context_buffer(mssql_batch_separator="BYE") as buf:
command.upgrade(self.cfg, self.a, sql=True)
assert "BYE" in buf.getvalue()
class OpTest(TestBase):
def test_add_column(self):
context = op_fixture('mssql')
op.add_column('t1', Column('c1', Integer, nullable=False))
context.assert_("ALTER TABLE t1 ADD c1 INTEGER NOT NULL")
def test_add_column_with_default(self):
context = op_fixture("mssql")
op.add_column(
't1', Column('c1', Integer, nullable=False, server_default="12"))
context.assert_("ALTER TABLE t1 ADD c1 INTEGER NOT NULL DEFAULT '12'")
def test_alter_column_rename_mssql(self):
context = op_fixture('mssql')
op.alter_column("t", "c", new_column_name="x")
context.assert_(
"EXEC sp_rename 't.c', x, 'COLUMN'"
)
def test_alter_column_rename_quoted_mssql(self):
context = op_fixture('mssql')
op.alter_column("t", "c", new_column_name="SomeFancyName")
context.assert_(
"EXEC sp_rename 't.c', [SomeFancyName], 'COLUMN'"
)
def test_alter_column_new_type(self):
context = op_fixture('mssql')
op.alter_column("t", "c", type_=Integer)
context.assert_(
'ALTER TABLE t ALTER COLUMN c INTEGER'
)
def test_alter_column_dont_touch_constraints(self):
context = op_fixture('mssql')
from sqlalchemy import Boolean
op.alter_column('tests', 'col',
existing_type=Boolean(),
nullable=False)
context.assert_('ALTER TABLE tests ALTER COLUMN col BIT NOT NULL')
@config.requirements.fail_before_sqla_084
def test_drop_index(self):
context = op_fixture('mssql')
op.drop_index('my_idx', 'my_table')
context.assert_contains("DROP INDEX my_idx ON my_table")
def test_drop_column_w_default(self):
context = op_fixture('mssql')
op.drop_column('t1', 'c1', mssql_drop_default=True)
op.drop_column('t1', 'c2', mssql_drop_default=True)
context.assert_contains(
"exec('alter table t1 drop constraint ' + @const_name)")
context.assert_contains("ALTER TABLE t1 DROP COLUMN c1")
def test_alter_column_drop_default(self):
context = op_fixture('mssql')
op.alter_column("t", "c", server_default=None)
context.assert_contains(
"exec('alter table t drop constraint ' + @const_name)")
def test_alter_column_dont_drop_default(self):
context = op_fixture('mssql')
op.alter_column("t", "c", server_default=False)
context.assert_()
def test_drop_column_w_check(self):
context = op_fixture('mssql')
op.drop_column('t1', 'c1', mssql_drop_check=True)
op.drop_column('t1', 'c2', mssql_drop_check=True)
context.assert_contains(
"exec('alter table t1 drop constraint ' + @const_name)")
context.assert_contains("ALTER TABLE t1 DROP COLUMN c1")
def test_drop_column_w_check_quoting(self):
context = op_fixture('mssql')
op.drop_column('table', 'column', mssql_drop_check=True)
context.assert_contains(
"exec('alter table [table] drop constraint ' + @const_name)")
context.assert_contains("ALTER TABLE [table] DROP COLUMN [column]")
def test_alter_column_nullable_w_existing_type(self):
context = op_fixture('mssql')
op.alter_column("t", "c", nullable=True, existing_type=Integer)
context.assert_(
"ALTER TABLE t ALTER COLUMN c INTEGER NULL"
)
def test_drop_column_w_fk(self):
context = op_fixture('mssql')
op.drop_column('t1', 'c1', mssql_drop_foreign_key=True)
context.assert_contains(
"exec('alter table t1 drop constraint ' + @const_name)")
context.assert_contains("ALTER TABLE t1 DROP COLUMN c1")
def test_alter_column_not_nullable_w_existing_type(self):
context = op_fixture('mssql')
op.alter_column("t", "c", nullable=False, existing_type=Integer)
context.assert_(
"ALTER TABLE t ALTER COLUMN c INTEGER NOT NULL"
)
def test_alter_column_nullable_w_new_type(self):
context = op_fixture('mssql')
op.alter_column("t", "c", nullable=True, type_=Integer)
context.assert_(
"ALTER TABLE t ALTER COLUMN c INTEGER NULL"
)
def test_alter_column_not_nullable_w_new_type(self):
context = op_fixture('mssql')
op.alter_column("t", "c", nullable=False, type_=Integer)
context.assert_(
"ALTER TABLE t ALTER COLUMN c INTEGER NOT NULL"
)
def test_alter_column_nullable_type_required(self):
context = op_fixture('mssql')
assert_raises_message(
util.CommandError,
"MS-SQL ALTER COLUMN operations with NULL or "
"NOT NULL require the existing_type or a new "
"type_ be passed.",
op.alter_column, "t", "c", nullable=False
)
def test_alter_add_server_default(self):
context = op_fixture('mssql')
op.alter_column("t", "c", server_default="5")
context.assert_(
"ALTER TABLE t ADD DEFAULT '5' FOR c"
)
def test_alter_replace_server_default(self):
context = op_fixture('mssql')
op.alter_column(
"t", "c", server_default="5", existing_server_default="6")
context.assert_contains(
"exec('alter table t drop constraint ' + @const_name)")
context.assert_contains(
"ALTER TABLE t ADD DEFAULT '5' FOR c"
)
def test_alter_remove_server_default(self):
context = op_fixture('mssql')
op.alter_column("t", "c", server_default=None)
context.assert_contains(
"exec('alter table t drop constraint ' + @const_name)")
def test_alter_do_everything(self):
context = op_fixture('mssql')
op.alter_column("t", "c", new_column_name="c2", nullable=True,
type_=Integer, server_default="5")
context.assert_(
'ALTER TABLE t ALTER COLUMN c INTEGER NULL',
"ALTER TABLE t ADD DEFAULT '5' FOR c",
"EXEC sp_rename 't.c', c2, 'COLUMN'"
)
def test_rename_table(self):
context = op_fixture('mssql')
op.rename_table('t1', 't2')
context.assert_contains("EXEC sp_rename 't1', t2")
# TODO: when we add schema support
# def test_alter_column_rename_mssql_schema(self):
# context = op_fixture('mssql')
# op.alter_column("t", "c", name="x", schema="y")
# context.assert_(
# "EXEC sp_rename 'y.t.c', 'x', 'COLUMN'"
# )
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