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import warnings
import aiomysql
import pytest
from aiomysql import sa, create_pool, DictCursor, Cursor
from sqlalchemy import MetaData, Table, Column, Integer, String
meta = MetaData()
tbl = Table('tbl', meta,
Column('id', Integer, nullable=False, primary_key=True),
Column('name', String(255)))
@pytest.fixture
def table(loop, connection_creator, table_cleanup):
async def f():
connection = await connection_creator()
cursor = await connection.cursor()
await cursor.execute("DROP TABLE IF EXISTS tbl;")
await cursor.execute("""CREATE TABLE tbl (
id MEDIUMINT NOT NULL AUTO_INCREMENT,
name VARCHAR(255) NOT NULL,
PRIMARY KEY (id));""")
for i in [(1, 'a'), (2, 'b'), (3, 'c')]:
await cursor.execute("INSERT INTO tbl VALUES(%s, %s)", i)
await cursor.execute("commit;")
await cursor.close()
table_cleanup('tbl')
loop.run_until_complete(f())
@pytest.mark.run_loop
async def test_cursor(table, cursor):
ret = []
await cursor.execute('SELECT * from tbl;')
assert not cursor.closed
async with cursor:
async for i in cursor:
ret.append(i)
assert [(1, 'a'), (2, 'b'), (3, 'c')] == ret
assert cursor.closed
@pytest.mark.run_loop
async def test_cursor_lightweight(table, cursor):
await cursor.execute('SELECT * from tbl;')
assert not cursor.closed
async with cursor:
pass
assert cursor.closed
@pytest.mark.run_loop
async def test_cursor_method(connection):
async with connection.cursor() as cursor:
await cursor.execute('SELECT 42;')
value = await cursor.fetchone()
assert value == (42,)
assert cursor.closed
@pytest.mark.run_loop
async def test_connection(connection):
assert not connection.closed
async with connection:
assert not connection.closed
assert connection.closed
@pytest.mark.run_loop
async def test_connection_exception(connection):
assert not connection.closed
with pytest.raises(RuntimeError) as ctx:
async with connection:
assert not connection.closed
raise RuntimeError('boom')
assert str(ctx.value) == 'boom'
assert connection.closed
@pytest.mark.run_loop
async def test_connect_method(mysql_params, loop):
async with aiomysql.connect(loop=loop, **mysql_params) as connection:
async with connection.cursor() as cursor:
await cursor.execute("SELECT 42")
value = await cursor.fetchone()
assert value, (42,)
assert cursor.closed
assert connection.closed
@pytest.mark.run_loop
async def test_connect_method_exception(mysql_params, loop):
with pytest.raises(RuntimeError) as ctx:
async with aiomysql.connect(loop=loop, **mysql_params) as connection:
assert not connection.closed
raise RuntimeError('boom')
assert str(ctx.value) == 'boom'
assert connection.closed
@pytest.mark.run_loop
async def test_pool(table, pool_creator, loop):
pool = await pool_creator()
async with pool.acquire() as conn:
async with (await conn.cursor()) as cur:
await cur.execute("SELECT * from tbl")
ret = []
async for i in cur:
ret.append(i)
assert [(1, 'a'), (2, 'b'), (3, 'c')] == ret
@pytest.mark.run_loop
async def test_create_pool_deprecations(mysql_params, loop):
async with create_pool(loop=loop, **mysql_params) as pool:
with warnings.catch_warnings(record=True) as w:
warnings.simplefilter("always")
async with pool.get() as conn:
pass
# The first warning emitted is expected to be DeprecationWarning:
# in the past, we used to check for the last one but this assumption
# breaks under Python 3.7 that also emits a `ResourceWarning` when
# executed with `PYTHONASYNCIODEBUG=1`.
assert issubclass(w[0].category, DeprecationWarning)
assert conn.closed
async with create_pool(loop=loop, **mysql_params) as pool:
with warnings.catch_warnings(record=True) as w:
warnings.simplefilter("always")
with await pool as conn:
pass
assert issubclass(w[-1].category, DeprecationWarning)
assert conn.closed
@pytest.mark.run_loop
async def test_sa_connection(table, mysql_params, loop):
async with sa.create_engine(loop=loop, **mysql_params) as engine:
connection = await engine.acquire()
assert not connection.closed
async with connection:
async with connection.execute(tbl.select()) as cursor:
ret = []
async for i in cursor:
ret.append(i)
assert [(1, 'a'), (2, 'b'), (3, 'c')] == ret
assert connection.closed
@pytest.mark.run_loop
async def test_sa_transaction(table, mysql_params, loop):
async with sa.create_engine(loop=loop, **mysql_params) as engine:
async with engine.acquire() as connection:
cnt = await connection.scalar(tbl.count())
assert 3 == cnt
async with (await connection.begin()) as tr:
assert tr.is_active
await connection.execute(tbl.delete())
assert not tr.is_active
cnt = await connection.scalar(tbl.count())
assert 0 == cnt
@pytest.mark.run_loop
async def test_sa_transaction_rollback(loop, mysql_params, table):
async with sa.create_engine(loop=loop, **mysql_params) as engine:
async with engine.acquire() as conn:
cnt = await conn.scalar(tbl.count())
assert 3 == cnt
with pytest.raises(RuntimeError) as ctx:
async with (await conn.begin()) as tr:
assert tr.is_active
await conn.execute(tbl.delete())
raise RuntimeError("Exit")
assert str(ctx.value) == "Exit"
assert not tr.is_active
cnt = await conn.scalar(tbl.count())
assert 3 == cnt
@pytest.mark.run_loop
async def test_create_engine(loop, mysql_params, table):
async with sa.create_engine(loop=loop, **mysql_params) as engine:
async with engine.acquire() as conn:
async with conn.execute(tbl.select()) as cursor:
ret = []
async for i in cursor:
ret.append(i)
assert [(1, 'a'), (2, 'b'), (3, 'c')] == ret
@pytest.mark.run_loop
async def test_engine(loop, mysql_params, table):
engine = await sa.create_engine(loop=loop, **mysql_params)
async with engine:
async with engine.acquire() as conn:
async with conn.execute(tbl.select()) as cursor:
ret = []
async for i in cursor:
ret.append(i)
assert [(1, 'a'), (2, 'b'), (3, 'c')] == ret
@pytest.mark.run_loop
async def test_transaction_context_manager(loop, mysql_params, table):
async with sa.create_engine(loop=loop, **mysql_params) as engine:
async with engine.acquire() as conn:
async with conn.begin() as tr:
async with conn.execute(tbl.select()) as cursor:
ret = []
async for i in cursor:
ret.append(i)
assert [(1, 'a'), (2, 'b'), (3, 'c')] == ret
assert cursor.closed
assert not tr.is_active
tr2 = await conn.begin()
async with tr2:
assert tr2.is_active
async with conn.execute('SELECT 1;') as cursor:
rec = await cursor.scalar()
assert rec == 1
await cursor.close()
assert not tr2.is_active
@pytest.mark.run_loop
async def test_transaction_context_manager_error(loop, mysql_params, table):
async with sa.create_engine(loop=loop, **mysql_params) as engine:
async with engine.acquire() as conn:
with pytest.raises(RuntimeError) as ctx:
async with conn.begin() as tr:
assert tr.is_active
raise RuntimeError('boom')
assert str(ctx.value) == 'boom'
assert not tr.is_active
assert conn.closed
@pytest.mark.run_loop
async def test_transaction_context_manager_commit_once(loop, mysql_params,
table):
async with sa.create_engine(loop=loop, **mysql_params) as engine:
async with engine.acquire() as conn:
async with conn.begin() as tr:
# check that in context manager we do not execute
# commit for second time. Two commits in row causes
# InvalidRequestError exception
await tr.commit()
assert not tr.is_active
tr2 = await conn.begin()
async with tr2:
assert tr2.is_active
# check for double commit one more time
await tr2.commit()
assert not tr2.is_active
assert conn.closed
@pytest.mark.run_loop
async def test_incompatible_cursor_fails(loop, mysql_params):
mysql_params['cursorclass'] = DictCursor
with pytest.raises(sa.ArgumentError) as ctx:
await sa.create_engine(loop=loop, **mysql_params)
msg = 'SQLAlchemy engine does not support this cursor class'
assert str(ctx.value) == msg
@pytest.mark.run_loop
async def test_compatible_cursor_correct(loop, mysql_params):
class SubCursor(Cursor):
pass
mysql_params['cursorclass'] = SubCursor
async with sa.create_engine(loop=loop, **mysql_params) as engine:
async with engine.acquire() as conn:
# check not raise sa.ArgumentError exception
pass
assert conn.closed
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