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525 lines
18 KiB
Python
525 lines
18 KiB
Python
# -*- coding: iso-8859-1 -*-
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import unittest, test.support
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import sys, io, os
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class SysModuleTest(unittest.TestCase):
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def setUp(self):
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self.orig_stdout = sys.stdout
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self.orig_stderr = sys.stderr
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self.orig_displayhook = sys.displayhook
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def tearDown(self):
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sys.stdout = self.orig_stdout
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sys.stderr = self.orig_stderr
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sys.displayhook = self.orig_displayhook
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def test_original_displayhook(self):
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import builtins
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out = io.StringIO()
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sys.stdout = out
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dh = sys.__displayhook__
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self.assertRaises(TypeError, dh)
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if hasattr(builtins, "_"):
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del builtins._
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dh(None)
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self.assertEqual(out.getvalue(), "")
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self.assert_(not hasattr(builtins, "_"))
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dh(42)
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self.assertEqual(out.getvalue(), "42\n")
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self.assertEqual(builtins._, 42)
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del sys.stdout
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self.assertRaises(RuntimeError, dh, 42)
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def test_lost_displayhook(self):
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del sys.displayhook
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code = compile("42", "<string>", "single")
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self.assertRaises(RuntimeError, eval, code)
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def test_custom_displayhook(self):
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def baddisplayhook(obj):
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raise ValueError
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sys.displayhook = baddisplayhook
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code = compile("42", "<string>", "single")
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self.assertRaises(ValueError, eval, code)
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def test_original_excepthook(self):
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err = io.StringIO()
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sys.stderr = err
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eh = sys.__excepthook__
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self.assertRaises(TypeError, eh)
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try:
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raise ValueError(42)
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except ValueError as exc:
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eh(*sys.exc_info())
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self.assert_(err.getvalue().endswith("ValueError: 42\n"))
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# FIXME: testing the code for a lost or replaced excepthook in
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# Python/pythonrun.c::PyErr_PrintEx() is tricky.
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def test_exit(self):
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self.assertRaises(TypeError, sys.exit, 42, 42)
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# call without argument
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try:
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sys.exit(0)
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except SystemExit as exc:
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self.assertEquals(exc.code, 0)
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except:
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self.fail("wrong exception")
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else:
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self.fail("no exception")
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# call with tuple argument with one entry
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# entry will be unpacked
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try:
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sys.exit(42)
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except SystemExit as exc:
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self.assertEquals(exc.code, 42)
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except:
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self.fail("wrong exception")
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else:
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self.fail("no exception")
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# call with integer argument
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try:
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sys.exit((42,))
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except SystemExit as exc:
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self.assertEquals(exc.code, 42)
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except:
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self.fail("wrong exception")
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else:
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self.fail("no exception")
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# call with string argument
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try:
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sys.exit("exit")
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except SystemExit as exc:
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self.assertEquals(exc.code, "exit")
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except:
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self.fail("wrong exception")
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else:
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self.fail("no exception")
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# call with tuple argument with two entries
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try:
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sys.exit((17, 23))
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except SystemExit as exc:
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self.assertEquals(exc.code, (17, 23))
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except:
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self.fail("wrong exception")
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else:
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self.fail("no exception")
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# test that the exit machinery handles SystemExits properly
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import subprocess
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rc = subprocess.call([sys.executable, "-c",
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"raise SystemExit(47)"])
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self.assertEqual(rc, 47)
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def test_getdefaultencoding(self):
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self.assertRaises(TypeError, sys.getdefaultencoding, 42)
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# can't check more than the type, as the user might have changed it
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self.assert_(isinstance(sys.getdefaultencoding(), str))
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# testing sys.settrace() is done in test_trace.py
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# testing sys.setprofile() is done in test_profile.py
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def test_setcheckinterval(self):
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self.assertRaises(TypeError, sys.setcheckinterval)
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orig = sys.getcheckinterval()
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for n in 0, 100, 120, orig: # orig last to restore starting state
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sys.setcheckinterval(n)
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self.assertEquals(sys.getcheckinterval(), n)
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def test_recursionlimit(self):
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self.assertRaises(TypeError, sys.getrecursionlimit, 42)
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oldlimit = sys.getrecursionlimit()
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self.assertRaises(TypeError, sys.setrecursionlimit)
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self.assertRaises(ValueError, sys.setrecursionlimit, -42)
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sys.setrecursionlimit(10000)
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self.assertEqual(sys.getrecursionlimit(), 10000)
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sys.setrecursionlimit(oldlimit)
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def test_getwindowsversion(self):
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if hasattr(sys, "getwindowsversion"):
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v = sys.getwindowsversion()
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self.assert_(isinstance(v, tuple))
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self.assertEqual(len(v), 5)
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self.assert_(isinstance(v[0], int))
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self.assert_(isinstance(v[1], int))
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self.assert_(isinstance(v[2], int))
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self.assert_(isinstance(v[3], int))
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self.assert_(isinstance(v[4], str))
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def test_dlopenflags(self):
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if hasattr(sys, "setdlopenflags"):
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self.assert_(hasattr(sys, "getdlopenflags"))
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self.assertRaises(TypeError, sys.getdlopenflags, 42)
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oldflags = sys.getdlopenflags()
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self.assertRaises(TypeError, sys.setdlopenflags)
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sys.setdlopenflags(oldflags+1)
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self.assertEqual(sys.getdlopenflags(), oldflags+1)
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sys.setdlopenflags(oldflags)
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def test_refcount(self):
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self.assertRaises(TypeError, sys.getrefcount)
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c = sys.getrefcount(None)
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n = None
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self.assertEqual(sys.getrefcount(None), c+1)
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del n
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self.assertEqual(sys.getrefcount(None), c)
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if hasattr(sys, "gettotalrefcount"):
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self.assert_(isinstance(sys.gettotalrefcount(), int))
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def test_getframe(self):
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self.assertRaises(TypeError, sys._getframe, 42, 42)
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self.assertRaises(ValueError, sys._getframe, 2000000000)
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self.assert_(
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SysModuleTest.test_getframe.__code__ \
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is sys._getframe().f_code
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)
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# sys._current_frames() is a CPython-only gimmick.
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def test_current_frames(self):
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have_threads = True
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try:
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import _thread
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except ImportError:
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have_threads = False
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if have_threads:
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self.current_frames_with_threads()
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else:
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self.current_frames_without_threads()
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# Test sys._current_frames() in a WITH_THREADS build.
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def current_frames_with_threads(self):
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import threading, _thread
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import traceback
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# Spawn a thread that blocks at a known place. Then the main
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# thread does sys._current_frames(), and verifies that the frames
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# returned make sense.
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entered_g = threading.Event()
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leave_g = threading.Event()
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thread_info = [] # the thread's id
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def f123():
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g456()
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def g456():
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thread_info.append(_thread.get_ident())
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entered_g.set()
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leave_g.wait()
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t = threading.Thread(target=f123)
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t.start()
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entered_g.wait()
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# At this point, t has finished its entered_g.set(), although it's
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# impossible to guess whether it's still on that line or has moved on
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# to its leave_g.wait().
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self.assertEqual(len(thread_info), 1)
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thread_id = thread_info[0]
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d = sys._current_frames()
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main_id = _thread.get_ident()
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self.assert_(main_id in d)
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self.assert_(thread_id in d)
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# Verify that the captured main-thread frame is _this_ frame.
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frame = d.pop(main_id)
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self.assert_(frame is sys._getframe())
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# Verify that the captured thread frame is blocked in g456, called
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# from f123. This is a litte tricky, since various bits of
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# threading.py are also in the thread's call stack.
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frame = d.pop(thread_id)
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stack = traceback.extract_stack(frame)
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for i, (filename, lineno, funcname, sourceline) in enumerate(stack):
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if funcname == "f123":
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break
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else:
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self.fail("didn't find f123() on thread's call stack")
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self.assertEqual(sourceline, "g456()")
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# And the next record must be for g456().
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filename, lineno, funcname, sourceline = stack[i+1]
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self.assertEqual(funcname, "g456")
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self.assert_(sourceline in ["leave_g.wait()", "entered_g.set()"])
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# Reap the spawned thread.
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leave_g.set()
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t.join()
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# Test sys._current_frames() when thread support doesn't exist.
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def current_frames_without_threads(self):
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# Not much happens here: there is only one thread, with artificial
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# "thread id" 0.
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d = sys._current_frames()
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self.assertEqual(len(d), 1)
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self.assert_(0 in d)
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self.assert_(d[0] is sys._getframe())
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def test_attributes(self):
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self.assert_(isinstance(sys.api_version, int))
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self.assert_(isinstance(sys.argv, list))
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self.assert_(sys.byteorder in ("little", "big"))
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self.assert_(isinstance(sys.builtin_module_names, tuple))
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self.assert_(isinstance(sys.copyright, str))
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self.assert_(isinstance(sys.exec_prefix, str))
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self.assert_(isinstance(sys.executable, str))
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self.assertEqual(len(sys.float_info), 11)
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self.assertEqual(sys.float_info.radix, 2)
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self.assert_(isinstance(sys.hexversion, int))
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self.assert_(isinstance(sys.maxsize, int))
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self.assert_(isinstance(sys.maxunicode, int))
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self.assert_(isinstance(sys.platform, str))
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self.assert_(isinstance(sys.prefix, str))
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self.assert_(isinstance(sys.version, str))
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vi = sys.version_info
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self.assert_(isinstance(vi, tuple))
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self.assertEqual(len(vi), 5)
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self.assert_(isinstance(vi[0], int))
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self.assert_(isinstance(vi[1], int))
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self.assert_(isinstance(vi[2], int))
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self.assert_(vi[3] in ("alpha", "beta", "candidate", "final"))
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self.assert_(isinstance(vi[4], int))
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def test_43581(self):
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# Can't use sys.stdout, as this is a StringIO object when
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# the test runs under regrtest.
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self.assertEqual(sys.__stdout__.encoding, sys.__stderr__.encoding)
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def test_intern(self):
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self.assertRaises(TypeError, sys.intern)
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s = "never interned before"
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self.assert_(sys.intern(s) is s)
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s2 = s.swapcase().swapcase()
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self.assert_(sys.intern(s2) is s)
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# Subclasses of string can't be interned, because they
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# provide too much opportunity for insane things to happen.
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# We don't want them in the interned dict and if they aren't
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# actually interned, we don't want to create the appearance
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# that they are by allowing intern() to succeeed.
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class S(str):
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def __hash__(self):
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return 123
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self.assertRaises(TypeError, sys.intern, S("abc"))
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def test_sys_flags(self):
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self.failUnless(sys.flags)
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attrs = ("debug", "division_warning",
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"inspect", "interactive", "optimize", "dont_write_bytecode",
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"no_user_site", "no_site", "ignore_environment", "verbose",
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"bytes_warning")
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for attr in attrs:
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self.assert_(hasattr(sys.flags, attr), attr)
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self.assertEqual(type(getattr(sys.flags, attr)), int, attr)
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self.assert_(repr(sys.flags))
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self.assertEqual(len(sys.flags), len(attrs))
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def test_clear_type_cache(self):
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sys._clear_type_cache()
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def test_compact_freelists(self):
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sys._compact_freelists()
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r = sys._compact_freelists()
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## freed blocks shouldn't change
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#self.assertEqual(r[0][2], 0)
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## fill freelists
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#ints = list(range(10000))
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#floats = [float(i) for i in ints]
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#del ints
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#del floats
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## should free more than 100 blocks
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#r = sys._compact_freelists()
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#self.assert_(r[0][1] > 100, r[0][1])
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#self.assert_(r[0][2] > 100, r[0][2])
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def test_ioencoding(self):
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import subprocess,os
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env = dict(os.environ)
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# Test character: cent sign, encoded as 0x4A (ASCII J) in CP424,
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# not representable in ASCII.
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env["PYTHONIOENCODING"] = "cp424"
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p = subprocess.Popen([sys.executable, "-c", 'print(chr(0xa2))'],
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stdout = subprocess.PIPE, env=env)
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out = p.stdout.read()
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self.assertEqual(out, "\xa2\n".encode("cp424"))
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env["PYTHONIOENCODING"] = "ascii:replace"
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p = subprocess.Popen([sys.executable, "-c", 'print(chr(0xa2))'],
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stdout = subprocess.PIPE, env=env)
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out = p.stdout.read().strip()
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self.assertEqual(out, b'?')
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class SizeofTest(unittest.TestCase):
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def setUp(self):
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import struct
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self.i = len(struct.pack('i', 0))
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self.l = len(struct.pack('l', 0))
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self.p = len(struct.pack('P', 0))
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self.headersize = self.l + self.p
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if hasattr(sys, "gettotalrefcount"):
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self.headersize += 2 * self.p
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self.file = open(test.support.TESTFN, 'wb')
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def tearDown(self):
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self.file.close()
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test.support.unlink(test.support.TESTFN)
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def check_sizeof(self, o, size, size2=None):
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"""Check size of o. Possible are size and optionally size2)."""
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result = sys.getsizeof(o)
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msg = 'wrong size for %s: got %d, expected ' % (type(o), result)
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if (size2 != None) and (result != size):
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self.assertEqual(result, size2, msg + str(size2))
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else:
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self.assertEqual(result, size, msg + str(size))
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def align(self, value):
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mod = value % self.p
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if mod != 0:
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return value - mod + self.p
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else:
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return value
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def test_align(self):
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self.assertEqual(self.align(0) % self.p, 0)
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self.assertEqual(self.align(1) % self.p, 0)
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self.assertEqual(self.align(3) % self.p, 0)
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self.assertEqual(self.align(4) % self.p, 0)
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self.assertEqual(self.align(7) % self.p, 0)
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self.assertEqual(self.align(8) % self.p, 0)
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self.assertEqual(self.align(9) % self.p, 0)
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def test_standardtypes(self):
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i = self.i
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l = self.l
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p = self.p
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h = self.headersize
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# bool
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self.check_sizeof(True, h + 2*l)
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# bytearray
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self.check_sizeof(bytes(), h + self.align(i) + l + p)
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# cell
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def get_cell():
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x = 42
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def inner():
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return x
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return inner
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self.check_sizeof(get_cell().__closure__[0], h + p)
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# code
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self.check_sizeof(get_cell().__code__, h + self.align(5*i) + 8*p +\
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self.align(i) + 2*p)
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# complex
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self.check_sizeof(complex(0,1), h + 2*8)
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# enumerate
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self.check_sizeof(enumerate([]), h + l + 3*p)
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# reverse
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self.check_sizeof(reversed(''), h + l + p )
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# float
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self.check_sizeof(float(0), h + 8)
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# function
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def func(): pass
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self.check_sizeof(func, h + 11 * p)
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class c():
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@staticmethod
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def foo():
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pass
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@classmethod
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def bar(cls):
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pass
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# staticmethod
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self.check_sizeof(foo, h + l)
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# classmethod
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self.check_sizeof(bar, h + l)
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# generator
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def get_gen(): yield 1
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self.check_sizeof(get_gen(), h + p + self.align(i) + 2*p)
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# builtin_function_or_method
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self.check_sizeof(abs, h + 3*p)
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# module
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self.check_sizeof(unittest, h + 3*p)
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# range
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self.check_sizeof(range(1), h + 3*p)
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# slice
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self.check_sizeof(slice(0), h + 3*p)
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h += l
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# new-style class
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class class_newstyle(object):
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def method():
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pass
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# type (PyTypeObject + PyNumberMethods + PyMappingMethods +
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# PySequenceMethods + PyBufferProcs)
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self.check_sizeof(class_newstyle, h +\
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p + 2*l + 15*p + l + 4*p + l + 9*p + l + 11*p +\
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self.align(4) +\
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16*p + self.align(i) + 20*p +\
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10*p + 3*p + 2*p + 2*p);
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def test_specialtypes(self):
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i = self.i
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l = self.l
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p = self.p
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h = self.headersize
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# dict
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self.check_sizeof({}, h + 3*l + 3*p + 8*(l + 2*p))
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longdict = {1:1, 2:2, 3:3, 4:4, 5:5, 6:6, 7:7, 8:8}
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self.check_sizeof(longdict, h + 3*l + 3*p + 8*(l + 2*p) + 16*(l + 2*p))
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# list
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self.check_sizeof([], h + l + p + l)
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self.check_sizeof([1, 2, 3], h + l + p + l + 3*l)
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# unicode
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import math
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usize = math.log(sys.maxunicode + 1, 2) / 8
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samples = ['', '1'*100]
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# we need to test for both sizes, because we don't know if the string
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# has been cached
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for s in samples:
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|
basicsize = h + l + p + l + l + p + usize * (len(s) + 1)
|
|
defenc = bytes(s, 'ascii')
|
|
self.check_sizeof(s, basicsize,
|
|
size2=basicsize + sys.getsizeof(defenc))
|
|
# trigger caching encoded version as bytes object
|
|
try:
|
|
getattr(sys, s)
|
|
except AttributeError:
|
|
pass
|
|
finally:
|
|
self.check_sizeof(s, basicsize + sys.getsizeof(defenc))
|
|
|
|
h += l
|
|
# long
|
|
self.check_sizeof(0, h + self.align(2))
|
|
self.check_sizeof(1, h + self.align(2))
|
|
self.check_sizeof(-1, h + self.align(2))
|
|
self.check_sizeof(32768, h + self.align(2) + 2)
|
|
self.check_sizeof(32768*32768-1, h + self.align(2) + 2)
|
|
self.check_sizeof(32768*32768, h + self.align(2) + 4)
|
|
|
|
|
|
def test_main():
|
|
test.support.run_unittest(SysModuleTest, SizeofTest)
|
|
|
|
if __name__ == "__main__":
|
|
test_main()
|