bpo-23819: Get rid of assert statements in test_asyncio (GH-30212)

To keep checks even if run tests with optimized Python.

Either use special assertion methods like assertEqual() or
raise an AssertionError explicitly.

Lib/test/test_asyncio/test_base_events.py

@@ -647,7 +647,7 @@ class BaseEventLoopTests(test_utils.TestCase):
                                 'Exception in callback.*zero'),
                         exc_info=(ZeroDivisionError, MOCK_ANY, MOCK_ANY))
 
-        assert not mock_handler.called
+        self.assertFalse(mock_handler.called)
 
     def test_set_exc_handler_broken(self):
         def run_loop():
@@ -1007,22 +1007,26 @@ class MyProto(asyncio.Protocol):
         if create_future:
             self.done = asyncio.get_running_loop().create_future()
 
+    def _assert_state(self, *expected):
+        if self.state not in expected:
+            raise AssertionError(f'state: {self.state!r}, expected: {expected!r}')
+
     def connection_made(self, transport):
         self.transport = transport
-        assert self.state == 'INITIAL', self.state
+        self._assert_state('INITIAL')
         self.state = 'CONNECTED'
         transport.write(b'GET / HTTP/1.0\r\nHost: example.com\r\n\r\n')
 
     def data_received(self, data):
-        assert self.state == 'CONNECTED', self.state
+        self._assert_state('CONNECTED')
         self.nbytes += len(data)
 
     def eof_received(self):
-        assert self.state == 'CONNECTED', self.state
+        self._assert_state('CONNECTED')
         self.state = 'EOF'
 
     def connection_lost(self, exc):
-        assert self.state in ('CONNECTED', 'EOF'), self.state
+        self._assert_state('CONNECTED', 'EOF')
         self.state = 'CLOSED'
         if self.done:
             self.done.set_result(None)
@@ -1037,20 +1041,24 @@ class MyDatagramProto(asyncio.DatagramProtocol):
         if create_future:
             self.done = loop.create_future()
 
+    def _assert_state(self, expected):
+        if self.state != expected:
+            raise AssertionError(f'state: {self.state!r}, expected: {expected!r}')
+
     def connection_made(self, transport):
         self.transport = transport
-        assert self.state == 'INITIAL', self.state
+        self._assert_state('INITIAL')
         self.state = 'INITIALIZED'
 
     def datagram_received(self, data, addr):
-        assert self.state == 'INITIALIZED', self.state
+        self._assert_state('INITIALIZED')
         self.nbytes += len(data)
 
     def error_received(self, exc):
-        assert self.state == 'INITIALIZED', self.state
+        self._assert_state('INITIALIZED')
 
     def connection_lost(self, exc):
-        assert self.state == 'INITIALIZED', self.state
+        self._assert_state('INITIALIZED')
         self.state = 'CLOSED'
         if self.done:
             self.done.set_result(None)
@@ -1399,7 +1407,7 @@ class BaseEventLoopWithSelectorTests(test_utils.TestCase):
         addr = ('00:01:02:03:04:05', 1)
 
         def getaddrinfo(host, port, *args, **kw):
-            assert (host, port) == addr
+            self.assertEqual((host, port), addr)
             return [(999, 1, 999, '', (addr, 1))]
 
         m_socket.getaddrinfo = getaddrinfo
@@ -1698,7 +1706,7 @@ class BaseEventLoopWithSelectorTests(test_utils.TestCase):
             lambda: MyDatagramProto(create_future=True, loop=self.loop),
             family=socket.AF_UNIX)
         transport, protocol = self.loop.run_until_complete(fut)
-        assert transport._sock.family == socket.AF_UNIX
+        self.assertEqual(transport._sock.family, socket.AF_UNIX)
         transport.close()
         self.loop.run_until_complete(protocol.done)
         self.assertEqual('CLOSED', protocol.state)

Lib/test/test_asyncio/test_events.py

@@ -88,23 +88,27 @@ class MyBaseProto(asyncio.Protocol):
             self.connected = loop.create_future()
             self.done = loop.create_future()
 
+    def _assert_state(self, *expected):
+        if self.state not in expected:
+            raise AssertionError(f'state: {self.state!r}, expected: {expected!r}')
+
     def connection_made(self, transport):
         self.transport = transport
-        assert self.state == 'INITIAL', self.state
+        self._assert_state('INITIAL')
         self.state = 'CONNECTED'
         if self.connected:
             self.connected.set_result(None)
 
     def data_received(self, data):
-        assert self.state == 'CONNECTED', self.state
+        self._assert_state('CONNECTED')
         self.nbytes += len(data)
 
     def eof_received(self):
-        assert self.state == 'CONNECTED', self.state
+        self._assert_state('CONNECTED')
         self.state = 'EOF'
 
     def connection_lost(self, exc):
-        assert self.state in ('CONNECTED', 'EOF'), self.state
+        self._assert_state('CONNECTED', 'EOF')
         self.state = 'CLOSED'
         if self.done:
             self.done.set_result(None)
@@ -125,20 +129,24 @@ class MyDatagramProto(asyncio.DatagramProtocol):
         if loop is not None:
             self.done = loop.create_future()
 
+    def _assert_state(self, expected):
+        if self.state != expected:
+            raise AssertionError(f'state: {self.state!r}, expected: {expected!r}')
+
     def connection_made(self, transport):
         self.transport = transport
-        assert self.state == 'INITIAL', self.state
+        self._assert_state('INITIAL')
         self.state = 'INITIALIZED'
 
     def datagram_received(self, data, addr):
-        assert self.state == 'INITIALIZED', self.state
+        self._assert_state('INITIALIZED')
         self.nbytes += len(data)
 
     def error_received(self, exc):
-        assert self.state == 'INITIALIZED', self.state
+        self._assert_state('INITIALIZED')
 
     def connection_lost(self, exc):
-        assert self.state == 'INITIALIZED', self.state
+        self._assert_state('INITIALIZED')
         self.state = 'CLOSED'
         if self.done:
             self.done.set_result(None)
@@ -154,23 +162,27 @@ class MyReadPipeProto(asyncio.Protocol):
         if loop is not None:
             self.done = loop.create_future()
 
+    def _assert_state(self, expected):
+        if self.state != expected:
+            raise AssertionError(f'state: {self.state!r}, expected: {expected!r}')
+
     def connection_made(self, transport):
         self.transport = transport
-        assert self.state == ['INITIAL'], self.state
+        self._assert_state(['INITIAL'])
         self.state.append('CONNECTED')
 
     def data_received(self, data):
-        assert self.state == ['INITIAL', 'CONNECTED'], self.state
+        self._assert_state(['INITIAL', 'CONNECTED'])
         self.nbytes += len(data)
 
     def eof_received(self):
-        assert self.state == ['INITIAL', 'CONNECTED'], self.state
+        self._assert_state(['INITIAL', 'CONNECTED'])
         self.state.append('EOF')
 
     def connection_lost(self, exc):
         if 'EOF' not in self.state:
             self.state.append('EOF')  # It is okay if EOF is missed.
-        assert self.state == ['INITIAL', 'CONNECTED', 'EOF'], self.state
+        self._assert_state(['INITIAL', 'CONNECTED', 'EOF'])
         self.state.append('CLOSED')
         if self.done:
             self.done.set_result(None)
@@ -185,13 +197,17 @@ class MyWritePipeProto(asyncio.BaseProtocol):
         if loop is not None:
             self.done = loop.create_future()
 
+    def _assert_state(self, expected):
+        if self.state != expected:
+            raise AssertionError(f'state: {self.state!r}, expected: {expected!r}')
+
     def connection_made(self, transport):
         self.transport = transport
-        assert self.state == 'INITIAL', self.state
+        self._assert_state('INITIAL')
         self.state = 'CONNECTED'
 
     def connection_lost(self, exc):
-        assert self.state == 'CONNECTED', self.state
+        self._assert_state('CONNECTED')
         self.state = 'CLOSED'
         if self.done:
             self.done.set_result(None)
@@ -210,31 +226,35 @@ class MySubprocessProtocol(asyncio.SubprocessProtocol):
         self.got_data = {1: asyncio.Event(),
                          2: asyncio.Event()}
 
+    def _assert_state(self, expected):
+        if self.state != expected:
+            raise AssertionError(f'state: {self.state!r}, expected: {expected!r}')
+
     def connection_made(self, transport):
         self.transport = transport
-        assert self.state == 'INITIAL', self.state
+        self._assert_state('INITIAL')
         self.state = 'CONNECTED'
         self.connected.set_result(None)
 
     def connection_lost(self, exc):
-        assert self.state == 'CONNECTED', self.state
+        self._assert_state('CONNECTED')
         self.state = 'CLOSED'
         self.completed.set_result(None)
 
     def pipe_data_received(self, fd, data):
-        assert self.state == 'CONNECTED', self.state
+        self._assert_state('CONNECTED')
         self.data[fd] += data
         self.got_data[fd].set()
 
     def pipe_connection_lost(self, fd, exc):
-        assert self.state == 'CONNECTED', self.state
+        self._assert_state('CONNECTED')
         if exc:
             self.disconnects[fd].set_exception(exc)
         else:
             self.disconnects[fd].set_result(exc)
 
     def process_exited(self):
-        assert self.state == 'CONNECTED', self.state
+        self._assert_state('CONNECTED')
         self.returncode = self.transport.get_returncode()
 
 
@@ -1284,7 +1304,7 @@ class EventLoopTestsMixin:
             else:
                 break
         else:
-            assert False, 'Can not create socket.'
+            self.fail('Can not create socket.')
 
         f = self.loop.create_datagram_endpoint(
             lambda: MyDatagramProto(loop=self.loop), sock=sock)

Lib/test/test_asyncio/test_futures.py

@@ -54,30 +54,30 @@ class DuckFuture:
                 or self.__exception is not None)
 
     def result(self):
-        assert not self.cancelled()
+        self.assertFalse(self.cancelled())
         if self.__exception is not None:
             raise self.__exception
         return self.__result
 
     def exception(self):
-        assert not self.cancelled()
+        self.assertFalse(self.cancelled())
         return self.__exception
 
     def set_result(self, result):
-        assert not self.done()
+        self.assertFalse(self.done())
-        assert result is not None
+        self.assertIsNotNone(result)
         self.__result = result
 
     def set_exception(self, exception):
-        assert not self.done()
+        self.assertFalse(self.done())
-        assert exception is not None
+        self.assertIsNotNone(exception)
         self.__exception = exception
 
     def __iter__(self):
         if not self.done():
             self._asyncio_future_blocking = True
             yield self
-        assert self.done()
+        self.assertTrue(self.done())
         return self.result()
 
 
@@ -91,12 +91,12 @@ class DuckTests(test_utils.TestCase):
     def test_wrap_future(self):
         f = DuckFuture()
         g = asyncio.wrap_future(f)
-        assert g is f
+        self.assertIs(g, f)
 
     def test_ensure_future(self):
         f = DuckFuture()
         g = asyncio.ensure_future(f)
-        assert g is f
+        self.assertIs(g, f)
 
 
 class BaseFutureTests:

Lib/test/test_asyncio/test_sendfile.py

@@ -36,25 +36,29 @@ class MySendfileProto(asyncio.Protocol):
         self.data = bytearray()
         self.close_after = close_after
 
+    def _assert_state(self, *expected):
+        if self.state not in expected:
+            raise AssertionError(f'state: {self.state!r}, expected: {expected!r}')
+
     def connection_made(self, transport):
         self.transport = transport
-        assert self.state == 'INITIAL', self.state
+        self._assert_state('INITIAL')
         self.state = 'CONNECTED'
         if self.connected:
             self.connected.set_result(None)
 
     def eof_received(self):
-        assert self.state == 'CONNECTED', self.state
+        self._assert_state('CONNECTED')
         self.state = 'EOF'
 
     def connection_lost(self, exc):
-        assert self.state in ('CONNECTED', 'EOF'), self.state
+        self._assert_state('CONNECTED', 'EOF')
         self.state = 'CLOSED'
         if self.done:
             self.done.set_result(None)
 
     def data_received(self, data):
-        assert self.state == 'CONNECTED', self.state
+        self._assert_state('CONNECTED')
         self.nbytes += len(data)
         self.data.extend(data)
         super().data_received(data)

Lib/test/test_asyncio/test_sock_lowlevel.py

@@ -23,24 +23,28 @@ class MyProto(asyncio.Protocol):
             self.connected = loop.create_future()
             self.done = loop.create_future()
 
+    def _assert_state(self, *expected):
+        if self.state not in expected:
+            raise AssertionError(f'state: {self.state!r}, expected: {expected!r}')
+
     def connection_made(self, transport):
         self.transport = transport
-        assert self.state == 'INITIAL', self.state
+        self._assert_state('INITIAL')
         self.state = 'CONNECTED'
         if self.connected:
             self.connected.set_result(None)
         transport.write(b'GET / HTTP/1.0\r\nHost: example.com\r\n\r\n')
 
     def data_received(self, data):
-        assert self.state == 'CONNECTED', self.state
+        self._assert_state('CONNECTED')
         self.nbytes += len(data)
 
     def eof_received(self):
-        assert self.state == 'CONNECTED', self.state
+        self._assert_state('CONNECTED')
         self.state = 'EOF'
 
     def connection_lost(self, exc):
-        assert self.state in ('CONNECTED', 'EOF'), self.state
+        self._assert_state('CONNECTED', 'EOF')
         self.state = 'CLOSED'
         if self.done:
             self.done.set_result(None)
@@ -451,7 +455,7 @@ class BaseSockTestsMixin:
                 else:
                     break
             else:
-                assert False, 'Can not create socket.'
+                self.fail('Can not create socket.')
 
             f = self.loop.create_connection(
                 lambda: MyProto(loop=self.loop), sock=sock)

Lib/test/test_asyncio/test_sslproto.py

@@ -383,9 +383,9 @@ class BaseStartTLS(func_tests.FunctionalTestCaseMixin):
             def get_buffer(self, sizehint):
                 return self.buf
 
-            def buffer_updated(self, nsize):
+            def buffer_updated(slf, nsize):
-                assert nsize == 1
+                self.assertEqual(nsize, 1)
-                self.on_data.set_result(bytes(self.buf[:nsize]))
+                slf.on_data.set_result(bytes(slf.buf[:nsize]))
 
         class ClientProtoSecond(asyncio.Protocol):
             def __init__(self, on_data, on_eof):

Lib/test/test_asyncio/test_streams.py

@@ -987,10 +987,10 @@ os.close(fd)
             wr.close()
             f = wr.wait_closed()
             self.loop.run_until_complete(f)
-            assert rd.at_eof()
+            self.assertTrue(rd.at_eof())
             f = rd.read()
             data = self.loop.run_until_complete(f)
-            assert data == b''
+            self.assertEqual(data, b'')
 
         self.assertEqual(messages, [])
 

Lib/test/test_asyncio/test_tasks.py

@@ -278,7 +278,7 @@ class BaseTaskTests:
         self.set_event_loop(loop)
         fut = asyncio.ensure_future(Aw(coro()), loop=loop)
         loop.run_until_complete(fut)
-        assert fut.result() == 'ok'
+        self.assertEqual(fut.result(), 'ok')
 
     def test_ensure_future_neither(self):
         with self.assertRaises(TypeError):
@@ -1016,7 +1016,7 @@ class BaseTaskTests:
 
         async def main():
             result = await asyncio.wait_for(inner(), timeout=.01)
-            assert result == 1
+            self.assertEqual(result, 1)
 
         asyncio.run(main())
 

Lib/test/test_asyncio/test_unix_events.py

@@ -34,7 +34,8 @@ def EXITCODE(exitcode):
 
 
 def SIGNAL(signum):
-    assert 1 <= signum <= 68
+    if not 1 <= signum <= 68:
+        raise AssertionError(f'invalid signum {signum}')
     return 32768 - signum
 
 

Lib/test/test_asyncio/utils.py

@@ -409,12 +409,13 @@ class TestLoop(base_events.BaseEventLoop):
             return False
 
     def assert_writer(self, fd, callback, *args):
-        assert fd in self.writers, 'fd {} is not registered'.format(fd)
+        if fd not in self.writers:
+            raise AssertionError(f'fd {fd} is not registered')
         handle = self.writers[fd]
-        assert handle._callback == callback, '{!r} != {!r}'.format(
+        if handle._callback != callback:
-            handle._callback, callback)
+            raise AssertionError(f'{handle._callback!r} != {callback!r}')
-        assert handle._args == args, '{!r} != {!r}'.format(
+        if handle._args != args:
-            handle._args, args)
+            raise AssertionError(f'{handle._args!r} != {args!r}')
 
     def _ensure_fd_no_transport(self, fd):
         if not isinstance(fd, int):
@@ -530,7 +531,8 @@ class TestCase(unittest.TestCase):
                         thread.join()
 
     def set_event_loop(self, loop, *, cleanup=True):
-        assert loop is not None
+        if loop is None:
+            raise AssertionError('loop is None')
         # ensure that the event loop is passed explicitly in asyncio
         events.set_event_loop(None)
         if cleanup: