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115 lines
3.6 KiB
115 lines
3.6 KiB
import contextlib
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import os
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import platform
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import socket
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import sys
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import textwrap
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import typing # noqa: F401
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import unittest
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import warnings
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from tornado.testing import bind_unused_port
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skipIfNonUnix = unittest.skipIf(
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os.name != "posix" or sys.platform == "cygwin", "non-unix platform"
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)
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# travis-ci.org runs our tests in an overworked virtual machine, which makes
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# timing-related tests unreliable.
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skipOnTravis = unittest.skipIf(
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"TRAVIS" in os.environ, "timing tests unreliable on travis"
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)
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# Set the environment variable NO_NETWORK=1 to disable any tests that
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# depend on an external network.
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skipIfNoNetwork = unittest.skipIf("NO_NETWORK" in os.environ, "network access disabled")
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skipNotCPython = unittest.skipIf(
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platform.python_implementation() != "CPython", "Not CPython implementation"
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)
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# Used for tests affected by
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# https://bitbucket.org/pypy/pypy/issues/2616/incomplete-error-handling-in
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# TODO: remove this after pypy3 5.8 is obsolete.
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skipPypy3V58 = unittest.skipIf(
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platform.python_implementation() == "PyPy"
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and sys.version_info > (3,)
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and sys.pypy_version_info < (5, 9), # type: ignore
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"pypy3 5.8 has buggy ssl module",
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)
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def _detect_ipv6():
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if not socket.has_ipv6:
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# socket.has_ipv6 check reports whether ipv6 was present at compile
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# time. It's usually true even when ipv6 doesn't work for other reasons.
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return False
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sock = None
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try:
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sock = socket.socket(socket.AF_INET6)
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sock.bind(("::1", 0))
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except socket.error:
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return False
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finally:
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if sock is not None:
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sock.close()
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return True
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skipIfNoIPv6 = unittest.skipIf(not _detect_ipv6(), "ipv6 support not present")
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def refusing_port():
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"""Returns a local port number that will refuse all connections.
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Return value is (cleanup_func, port); the cleanup function
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must be called to free the port to be reused.
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"""
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# On travis-ci, port numbers are reassigned frequently. To avoid
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# collisions with other tests, we use an open client-side socket's
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# ephemeral port number to ensure that nothing can listen on that
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# port.
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server_socket, port = bind_unused_port()
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server_socket.setblocking(True)
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client_socket = socket.socket()
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client_socket.connect(("127.0.0.1", port))
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conn, client_addr = server_socket.accept()
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conn.close()
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server_socket.close()
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return (client_socket.close, client_addr[1])
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def exec_test(caller_globals, caller_locals, s):
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"""Execute ``s`` in a given context and return the result namespace.
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Used to define functions for tests in particular python
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versions that would be syntax errors in older versions.
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"""
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# Flatten the real global and local namespace into our fake
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# globals: it's all global from the perspective of code defined
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# in s.
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global_namespace = dict(caller_globals, **caller_locals) # type: ignore
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local_namespace = {} # type: typing.Dict[str, typing.Any]
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exec(textwrap.dedent(s), global_namespace, local_namespace)
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return local_namespace
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def subTest(test, *args, **kwargs):
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"""Compatibility shim for unittest.TestCase.subTest.
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Usage: ``with tornado.test.util.subTest(self, x=x):``
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"""
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try:
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subTest = test.subTest # py34+
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except AttributeError:
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subTest = contextlib.contextmanager(lambda *a, **kw: (yield))
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return subTest(*args, **kwargs)
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@contextlib.contextmanager
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def ignore_deprecation():
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"""Context manager to ignore deprecation warnings."""
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with warnings.catch_warnings():
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warnings.simplefilter("ignore", DeprecationWarning)
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yield
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