mirror of
https://github.com/python/cpython.git
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269 lines
9.0 KiB
Python
269 lines
9.0 KiB
Python
# -*- coding: iso-8859-1 -*-
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import unittest, test.test_support
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import sys, cStringIO
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class SysModuleTest(unittest.TestCase):
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def test_original_displayhook(self):
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import __builtin__
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savestdout = sys.stdout
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out = cStringIO.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(__builtin__, "_"):
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del __builtin__._
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dh(None)
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self.assertEqual(out.getvalue(), "")
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self.assert_(not hasattr(__builtin__, "_"))
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dh(42)
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self.assertEqual(out.getvalue(), "42\n")
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self.assertEqual(__builtin__._, 42)
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del sys.stdout
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self.assertRaises(RuntimeError, dh, 42)
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sys.stdout = savestdout
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def test_lost_displayhook(self):
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olddisplayhook = sys.displayhook
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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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sys.displayhook = olddisplayhook
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def test_custom_displayhook(self):
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olddisplayhook = sys.displayhook
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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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sys.displayhook = olddisplayhook
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def test_original_excepthook(self):
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savestderr = sys.stderr
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err = cStringIO.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, exc:
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eh(*sys.exc_info())
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sys.stderr = savestderr
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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_exc_clear(self):
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self.assertRaises(TypeError, sys.exc_clear, 42)
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# Verify that exc_info is present and matches exc, then clear it, and
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# check that it worked.
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def clear_check(exc):
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typ, value, traceback = sys.exc_info()
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self.assert_(typ is not None)
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self.assert_(value is exc)
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self.assert_(traceback is not None)
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sys.exc_clear()
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typ, value, traceback = sys.exc_info()
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self.assert_(typ is None)
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self.assert_(value is None)
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self.assert_(traceback is None)
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def clear():
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try:
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raise ValueError, 42
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except ValueError, exc:
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clear_check(exc)
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# Raise an exception and check that it can be cleared
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clear()
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# Verify that a frame currently handling an exception is
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# unaffected by calling exc_clear in a nested frame.
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try:
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raise ValueError, 13
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except ValueError, exc:
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typ1, value1, traceback1 = sys.exc_info()
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clear()
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typ2, value2, traceback2 = sys.exc_info()
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self.assert_(typ1 is typ2)
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self.assert_(value1 is exc)
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self.assert_(value1 is value2)
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self.assert_(traceback1 is traceback2)
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# Check that an exception can be cleared outside of an except block
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clear_check(exc)
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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, 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, 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, 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, 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, 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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# both unnormalized...
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rc = subprocess.call([sys.executable, "-c",
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"raise SystemExit, 46"])
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self.assertEqual(rc, 46)
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# ... and normalized
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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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if test.test_support.have_unicode:
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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.im_func.func_code \
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is sys._getframe().f_code
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)
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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, basestring))
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self.assert_(isinstance(sys.exec_prefix, basestring))
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self.assert_(isinstance(sys.executable, basestring))
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self.assert_(isinstance(sys.hexversion, int))
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self.assert_(isinstance(sys.maxint, int))
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if test.test_support.have_unicode:
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self.assert_(isinstance(sys.maxunicode, int))
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self.assert_(isinstance(sys.platform, basestring))
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self.assert_(isinstance(sys.prefix, basestring))
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self.assert_(isinstance(sys.version, basestring))
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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_main():
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test.test_support.run_unittest(SysModuleTest)
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if __name__ == "__main__":
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test_main()
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