| # -*- coding: iso-8859-1 -*- |
| import unittest, test.support |
| import sys, io |
| |
| class SysModuleTest(unittest.TestCase): |
| |
| def setUp(self): |
| self.orig_stdout = sys.stdout |
| self.orig_stderr = sys.stderr |
| self.orig_displayhook = sys.displayhook |
| |
| def tearDown(self): |
| sys.stdout = self.orig_stdout |
| sys.stderr = self.orig_stderr |
| sys.displayhook = self.orig_displayhook |
| |
| def test_original_displayhook(self): |
| import builtins |
| out = io.StringIO() |
| sys.stdout = out |
| |
| dh = sys.__displayhook__ |
| |
| self.assertRaises(TypeError, dh) |
| if hasattr(builtins, "_"): |
| del builtins._ |
| |
| dh(None) |
| self.assertEqual(out.getvalue(), "") |
| self.assert_(not hasattr(builtins, "_")) |
| dh(42) |
| self.assertEqual(out.getvalue(), "42\n") |
| self.assertEqual(builtins._, 42) |
| |
| del sys.stdout |
| self.assertRaises(RuntimeError, dh, 42) |
| |
| def test_lost_displayhook(self): |
| del sys.displayhook |
| code = compile("42", "<string>", "single") |
| self.assertRaises(RuntimeError, eval, code) |
| |
| def test_custom_displayhook(self): |
| def baddisplayhook(obj): |
| raise ValueError |
| sys.displayhook = baddisplayhook |
| code = compile("42", "<string>", "single") |
| self.assertRaises(ValueError, eval, code) |
| |
| def test_original_excepthook(self): |
| err = io.StringIO() |
| sys.stderr = err |
| |
| eh = sys.__excepthook__ |
| |
| self.assertRaises(TypeError, eh) |
| try: |
| raise ValueError(42) |
| except ValueError as exc: |
| eh(*sys.exc_info()) |
| |
| self.assert_(err.getvalue().endswith("ValueError: 42\n")) |
| |
| # FIXME: testing the code for a lost or replaced excepthook in |
| # Python/pythonrun.c::PyErr_PrintEx() is tricky. |
| |
| def test_exit(self): |
| self.assertRaises(TypeError, sys.exit, 42, 42) |
| |
| # call without argument |
| try: |
| sys.exit(0) |
| except SystemExit as exc: |
| self.assertEquals(exc.code, 0) |
| except: |
| self.fail("wrong exception") |
| else: |
| self.fail("no exception") |
| |
| # call with tuple argument with one entry |
| # entry will be unpacked |
| try: |
| sys.exit(42) |
| except SystemExit as exc: |
| self.assertEquals(exc.code, 42) |
| except: |
| self.fail("wrong exception") |
| else: |
| self.fail("no exception") |
| |
| # call with integer argument |
| try: |
| sys.exit((42,)) |
| except SystemExit as exc: |
| self.assertEquals(exc.code, 42) |
| except: |
| self.fail("wrong exception") |
| else: |
| self.fail("no exception") |
| |
| # call with string argument |
| try: |
| sys.exit("exit") |
| except SystemExit as exc: |
| self.assertEquals(exc.code, "exit") |
| except: |
| self.fail("wrong exception") |
| else: |
| self.fail("no exception") |
| |
| # call with tuple argument with two entries |
| try: |
| sys.exit((17, 23)) |
| except SystemExit as exc: |
| self.assertEquals(exc.code, (17, 23)) |
| except: |
| self.fail("wrong exception") |
| else: |
| self.fail("no exception") |
| |
| # test that the exit machinery handles SystemExits properly |
| import subprocess |
| rc = subprocess.call([sys.executable, "-c", |
| "raise SystemExit(47)"]) |
| self.assertEqual(rc, 47) |
| |
| def test_getdefaultencoding(self): |
| self.assertRaises(TypeError, sys.getdefaultencoding, 42) |
| # can't check more than the type, as the user might have changed it |
| self.assert_(isinstance(sys.getdefaultencoding(), str)) |
| |
| # testing sys.settrace() is done in test_trace.py |
| # testing sys.setprofile() is done in test_profile.py |
| |
| def test_setcheckinterval(self): |
| self.assertRaises(TypeError, sys.setcheckinterval) |
| orig = sys.getcheckinterval() |
| for n in 0, 100, 120, orig: # orig last to restore starting state |
| sys.setcheckinterval(n) |
| self.assertEquals(sys.getcheckinterval(), n) |
| |
| def test_recursionlimit(self): |
| self.assertRaises(TypeError, sys.getrecursionlimit, 42) |
| oldlimit = sys.getrecursionlimit() |
| self.assertRaises(TypeError, sys.setrecursionlimit) |
| self.assertRaises(ValueError, sys.setrecursionlimit, -42) |
| sys.setrecursionlimit(10000) |
| self.assertEqual(sys.getrecursionlimit(), 10000) |
| sys.setrecursionlimit(oldlimit) |
| |
| def test_getwindowsversion(self): |
| if hasattr(sys, "getwindowsversion"): |
| v = sys.getwindowsversion() |
| self.assert_(isinstance(v, tuple)) |
| self.assertEqual(len(v), 5) |
| self.assert_(isinstance(v[0], int)) |
| self.assert_(isinstance(v[1], int)) |
| self.assert_(isinstance(v[2], int)) |
| self.assert_(isinstance(v[3], int)) |
| self.assert_(isinstance(v[4], str)) |
| |
| def test_dlopenflags(self): |
| if hasattr(sys, "setdlopenflags"): |
| self.assert_(hasattr(sys, "getdlopenflags")) |
| self.assertRaises(TypeError, sys.getdlopenflags, 42) |
| oldflags = sys.getdlopenflags() |
| self.assertRaises(TypeError, sys.setdlopenflags) |
| sys.setdlopenflags(oldflags+1) |
| self.assertEqual(sys.getdlopenflags(), oldflags+1) |
| sys.setdlopenflags(oldflags) |
| |
| def test_refcount(self): |
| self.assertRaises(TypeError, sys.getrefcount) |
| c = sys.getrefcount(None) |
| n = None |
| self.assertEqual(sys.getrefcount(None), c+1) |
| del n |
| self.assertEqual(sys.getrefcount(None), c) |
| if hasattr(sys, "gettotalrefcount"): |
| self.assert_(isinstance(sys.gettotalrefcount(), int)) |
| |
| def test_getframe(self): |
| self.assertRaises(TypeError, sys._getframe, 42, 42) |
| self.assertRaises(ValueError, sys._getframe, 2000000000) |
| self.assert_( |
| SysModuleTest.test_getframe.__code__ \ |
| is sys._getframe().f_code |
| ) |
| |
| # sys._current_frames() is a CPython-only gimmick. |
| def test_current_frames(self): |
| have_threads = True |
| try: |
| import _thread |
| except ImportError: |
| have_threads = False |
| |
| if have_threads: |
| self.current_frames_with_threads() |
| else: |
| self.current_frames_without_threads() |
| |
| # Test sys._current_frames() in a WITH_THREADS build. |
| def current_frames_with_threads(self): |
| import threading, _thread |
| import traceback |
| |
| # Spawn a thread that blocks at a known place. Then the main |
| # thread does sys._current_frames(), and verifies that the frames |
| # returned make sense. |
| entered_g = threading.Event() |
| leave_g = threading.Event() |
| thread_info = [] # the thread's id |
| |
| def f123(): |
| g456() |
| |
| def g456(): |
| thread_info.append(_thread.get_ident()) |
| entered_g.set() |
| leave_g.wait() |
| |
| t = threading.Thread(target=f123) |
| t.start() |
| entered_g.wait() |
| |
| # At this point, t has finished its entered_g.set(), although it's |
| # impossible to guess whether it's still on that line or has moved on |
| # to its leave_g.wait(). |
| self.assertEqual(len(thread_info), 1) |
| thread_id = thread_info[0] |
| |
| d = sys._current_frames() |
| |
| main_id = _thread.get_ident() |
| self.assert_(main_id in d) |
| self.assert_(thread_id in d) |
| |
| # Verify that the captured main-thread frame is _this_ frame. |
| frame = d.pop(main_id) |
| self.assert_(frame is sys._getframe()) |
| |
| # Verify that the captured thread frame is blocked in g456, called |
| # from f123. This is a litte tricky, since various bits of |
| # threading.py are also in the thread's call stack. |
| frame = d.pop(thread_id) |
| stack = traceback.extract_stack(frame) |
| for i, (filename, lineno, funcname, sourceline) in enumerate(stack): |
| if funcname == "f123": |
| break |
| else: |
| self.fail("didn't find f123() on thread's call stack") |
| |
| self.assertEqual(sourceline, "g456()") |
| |
| # And the next record must be for g456(). |
| filename, lineno, funcname, sourceline = stack[i+1] |
| self.assertEqual(funcname, "g456") |
| self.assert_(sourceline in ["leave_g.wait()", "entered_g.set()"]) |
| |
| # Reap the spawned thread. |
| leave_g.set() |
| t.join() |
| |
| # Test sys._current_frames() when thread support doesn't exist. |
| def current_frames_without_threads(self): |
| # Not much happens here: there is only one thread, with artificial |
| # "thread id" 0. |
| d = sys._current_frames() |
| self.assertEqual(len(d), 1) |
| self.assert_(0 in d) |
| self.assert_(d[0] is sys._getframe()) |
| |
| def test_attributes(self): |
| self.assert_(isinstance(sys.api_version, int)) |
| self.assert_(isinstance(sys.argv, list)) |
| self.assert_(sys.byteorder in ("little", "big")) |
| self.assert_(isinstance(sys.builtin_module_names, tuple)) |
| self.assert_(isinstance(sys.copyright, str)) |
| self.assert_(isinstance(sys.exec_prefix, str)) |
| self.assert_(isinstance(sys.executable, str)) |
| self.assertEqual(len(sys.float_info), 11) |
| self.assertEqual(sys.float_info.radix, 2) |
| self.assert_(isinstance(sys.hexversion, int)) |
| self.assert_(isinstance(sys.maxsize, int)) |
| self.assert_(isinstance(sys.maxunicode, int)) |
| self.assert_(isinstance(sys.platform, str)) |
| self.assert_(isinstance(sys.prefix, str)) |
| self.assert_(isinstance(sys.version, str)) |
| vi = sys.version_info |
| self.assert_(isinstance(vi, tuple)) |
| self.assertEqual(len(vi), 5) |
| self.assert_(isinstance(vi[0], int)) |
| self.assert_(isinstance(vi[1], int)) |
| self.assert_(isinstance(vi[2], int)) |
| self.assert_(vi[3] in ("alpha", "beta", "candidate", "final")) |
| self.assert_(isinstance(vi[4], int)) |
| |
| def test_43581(self): |
| # Can't use sys.stdout, as this is a cStringIO object when |
| # the test runs under regrtest. |
| self.assertEqual(sys.__stdout__.encoding, sys.__stderr__.encoding) |
| |
| def test_intern(self): |
| self.assertRaises(TypeError, sys.intern) |
| s = "never interned before" |
| self.assert_(sys.intern(s) is s) |
| s2 = s.swapcase().swapcase() |
| self.assert_(sys.intern(s2) is s) |
| |
| # Subclasses of string can't be interned, because they |
| # provide too much opportunity for insane things to happen. |
| # We don't want them in the interned dict and if they aren't |
| # actually interned, we don't want to create the appearance |
| # that they are by allowing intern() to succeeed. |
| class S(str): |
| def __hash__(self): |
| return 123 |
| |
| self.assertRaises(TypeError, sys.intern, S("abc")) |
| |
| |
| def test_sys_flags(self): |
| self.failUnless(sys.flags) |
| attrs = ("debug", "division_warning", |
| "inspect", "interactive", "optimize", "dont_write_bytecode", |
| "no_site", "ignore_environment", "tabcheck", "verbose", |
| "bytes_warning") |
| for attr in attrs: |
| self.assert_(hasattr(sys.flags, attr), attr) |
| self.assertEqual(type(getattr(sys.flags, attr)), int, attr) |
| self.assert_(repr(sys.flags)) |
| |
| def test_clear_type_cache(self): |
| sys._clear_type_cache() |
| |
| def test_compact_freelists(self): |
| sys._compact_freelists() |
| r = sys._compact_freelists() |
| ## freed blocks shouldn't change |
| #self.assertEqual(r[0][2], 0) |
| ## fill freelists |
| #ints = list(range(10000)) |
| #floats = [float(i) for i in ints] |
| #del ints |
| #del floats |
| ## should free more than 100 blocks |
| #r = sys._compact_freelists() |
| #self.assert_(r[0][1] > 100, r[0][1]) |
| #self.assert_(r[0][2] > 100, r[0][2]) |
| |
| def test_main(): |
| test.support.run_unittest(SysModuleTest) |
| |
| if __name__ == "__main__": |
| test_main() |