cpython/Lib/test/test_import.py

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from test_support import TESTFN, TestFailed
import os
import random
import sys
# Brief digression to test that import is case-sensitive: if we got this
# far, we know for sure that "random" exists.
try:
import RAnDoM
except ImportError:
pass
else:
raise TestFailed("import of RAnDoM should have failed (case mismatch)")
# Another brief digression to test the accuracy of manifest float constants.
import double_const # don't blink -- that *was* the test
sys.path.insert(0, os.curdir)
source = TESTFN + ".py"
pyo = TESTFN + ".pyo"
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if sys.platform.startswith('java'):
pyc = TESTFN + "$py.class"
else:
pyc = TESTFN + ".pyc"
f = open(source, "w")
print >> f, "# This will test Python's ability to import a .py file"
a = random.randrange(1000)
b = random.randrange(1000)
print >> f, "a =", a
print >> f, "b =", b
f.close()
try:
try:
mod = __import__(TESTFN)
except ImportError, err:
raise ValueError, "import from .py failed: %s" % err
if mod.a != a or mod.b != b:
print a, "!=", mod.a
print b, "!=", mod.b
raise ValueError, "module loaded (%s) but contents invalid" % mod
finally:
os.unlink(source)
try:
try:
reload(mod)
except ImportError, err:
raise ValueError, "import from .pyc/.pyo failed: %s" % err
finally:
try:
os.unlink(pyc)
except os.error:
pass
try:
os.unlink(pyo)
except os.error:
pass
del sys.path[0]