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from sqlalchemy.testing import fixtures
from sqlalchemy.sql.ddl import SchemaGenerator, SchemaDropper
from sqlalchemy import MetaData, Table, Column, Integer, Sequence
from sqlalchemy import schema
from sqlalchemy.testing.mock import Mock
class EmitDDLTest(fixtures.TestBase):
def _mock_connection(self, item_exists):
def has_item(connection, name, schema):
return item_exists(name)
return Mock(dialect=Mock(
supports_sequences=True,
has_table=Mock(side_effect=has_item),
has_sequence=Mock(side_effect=has_item)
)
)
def _mock_create_fixture(self, checkfirst, tables,
item_exists=lambda item: False):
connection = self._mock_connection(item_exists)
return SchemaGenerator(connection.dialect, connection,
checkfirst=checkfirst,
tables=tables)
def _mock_drop_fixture(self, checkfirst, tables,
item_exists=lambda item: True):
connection = self._mock_connection(item_exists)
return SchemaDropper(connection.dialect, connection,
checkfirst=checkfirst,
tables=tables)
def _table_fixture(self):
m = MetaData()
return (m, ) + tuple(
Table('t%d' % i, m, Column('x', Integer))
for i in range(1, 6)
)
def _table_seq_fixture(self):
m = MetaData()
s1 = Sequence('s1')
s2 = Sequence('s2')
t1 = Table('t1', m, Column("x", Integer, s1, primary_key=True))
t2 = Table('t2', m, Column("x", Integer, s2, primary_key=True))
return m, t1, t2, s1, s2
def test_create_seq_checkfirst(self):
m, t1, t2, s1, s2 = self._table_seq_fixture()
generator = self._mock_create_fixture(
True, [
t1, t2], item_exists=lambda t: t not in (
"t1", "s1"))
self._assert_create([t1, s1], generator, m)
def test_drop_seq_checkfirst(self):
m, t1, t2, s1, s2 = self._table_seq_fixture()
generator = self._mock_drop_fixture(
True, [
t1, t2], item_exists=lambda t: t in (
"t1", "s1"))
self._assert_drop([t1, s1], generator, m)
def test_create_collection_checkfirst(self):
m, t1, t2, t3, t4, t5 = self._table_fixture()
generator = self._mock_create_fixture(
True, [
t2, t3, t4], item_exists=lambda t: t not in (
"t2", "t4"))
self._assert_create_tables([t2, t4], generator, m)
def test_drop_collection_checkfirst(self):
m, t1, t2, t3, t4, t5 = self._table_fixture()
generator = self._mock_drop_fixture(
True, [
t2, t3, t4], item_exists=lambda t: t in (
"t2", "t4"))
self._assert_drop_tables([t2, t4], generator, m)
def test_create_collection_nocheck(self):
m, t1, t2, t3, t4, t5 = self._table_fixture()
generator = self._mock_create_fixture(
False, [
t2, t3, t4], item_exists=lambda t: t not in (
"t2", "t4"))
self._assert_create_tables([t2, t3, t4], generator, m)
def test_create_empty_collection(self):
m, t1, t2, t3, t4, t5 = self._table_fixture()
generator = self._mock_create_fixture(
True,
[],
item_exists=lambda t: t not in (
"t2",
"t4"))
self._assert_create_tables([], generator, m)
def test_drop_empty_collection(self):
m, t1, t2, t3, t4, t5 = self._table_fixture()
generator = self._mock_drop_fixture(
True,
[],
item_exists=lambda t: t in (
"t2",
"t4"))
self._assert_drop_tables([], generator, m)
def test_drop_collection_nocheck(self):
m, t1, t2, t3, t4, t5 = self._table_fixture()
generator = self._mock_drop_fixture(
False, [
t2, t3, t4], item_exists=lambda t: t in (
"t2", "t4"))
self._assert_drop_tables([t2, t3, t4], generator, m)
def test_create_metadata_checkfirst(self):
m, t1, t2, t3, t4, t5 = self._table_fixture()
generator = self._mock_create_fixture(
True,
None,
item_exists=lambda t: t not in (
"t2",
"t4"))
self._assert_create_tables([t2, t4], generator, m)
def test_drop_metadata_checkfirst(self):
m, t1, t2, t3, t4, t5 = self._table_fixture()
generator = self._mock_drop_fixture(
True,
None,
item_exists=lambda t: t in (
"t2",
"t4"))
self._assert_drop_tables([t2, t4], generator, m)
def test_create_metadata_nocheck(self):
m, t1, t2, t3, t4, t5 = self._table_fixture()
generator = self._mock_create_fixture(
False,
None,
item_exists=lambda t: t not in (
"t2",
"t4"))
self._assert_create_tables([t1, t2, t3, t4, t5], generator, m)
def test_drop_metadata_nocheck(self):
m, t1, t2, t3, t4, t5 = self._table_fixture()
generator = self._mock_drop_fixture(
False,
None,
item_exists=lambda t: t in (
"t2",
"t4"))
self._assert_drop_tables([t1, t2, t3, t4, t5], generator, m)
def _assert_create_tables(self, elements, generator, argument):
self._assert_ddl(schema.CreateTable, elements, generator, argument)
def _assert_drop_tables(self, elements, generator, argument):
self._assert_ddl(schema.DropTable, elements, generator, argument)
def _assert_create(self, elements, generator, argument):
self._assert_ddl(
(schema.CreateTable, schema.CreateSequence),
elements, generator, argument)
def _assert_drop(self, elements, generator, argument):
self._assert_ddl(
(schema.DropTable, schema.DropSequence),
elements, generator, argument)
def _assert_ddl(self, ddl_cls, elements, generator, argument):
generator.traverse_single(argument)
for call_ in generator.connection.execute.mock_calls:
c = call_[1][0]
assert isinstance(c, ddl_cls)
assert c.element in elements, "element %r was not expected"\
% c.element
elements.remove(c.element)
assert not elements, "elements remain in list: %r" % elements
|
