cpython/Lib/test/test_pkg.py

# Test packages (dotted-name import)

import sys, os, tempfile, traceback
from os import mkdir, rmdir          # Can't test if these fail
del mkdir, rmdir
from test.test_support import verify, verbose, TestFailed

# Helpers to create and destroy hierarchies.

def mkhier(root, descr):
    if not os.path.isdir(root):
        mkdir(root)
    for name, contents in descr:
        comps = name.split()
        fullname = root
        for c in comps:
            fullname = os.path.join(fullname, c)
        if contents is None:
            mkdir(fullname)
        else:
            if verbose: print("write", fullname)
            f = open(fullname, "w")
            f.write(contents)
            if contents and contents[-1] != '\n':
                f.write('\n')
            f.close()

def mkdir(x):
    if verbose: print("mkdir", x)
    os.mkdir(x)

def cleanout(root):
    names = os.listdir(root)
    for name in names:
        fullname = os.path.join(root, name)
        if os.path.isdir(fullname) and not os.path.islink(fullname):
            cleanout(fullname)
        else:
            os.remove(fullname)
    rmdir(root)

def rmdir(x):
    if verbose: print("rmdir", x)
    os.rmdir(x)

def fixdir(lst):
    try:
        lst.remove('__builtins__')
    except ValueError:
        pass
    return lst

# Helper to run a test

def runtest(hier, code):
    root = tempfile.mkdtemp()
    mkhier(root, hier)
    savepath = sys.path[:]
    fd, fname = tempfile.mkstemp(text=True)
    os.write(fd, code)
    os.close(fd)
    try:
        sys.path.insert(0, root)
        if verbose: print("sys.path =", sys.path)
        try:
            exec(open(fname).read(), globals(), {})
        except:
            traceback.print_exc(file=sys.stdout)
    finally:
        sys.path[:] = savepath
        os.unlink(fname)
        try:
            cleanout(root)
        except (os.error, IOError):
            pass

# Test descriptions

tests = [
    ("t1", [("t1", None), ("t1 __init__.py", "")], "import t1"),

    ("t2", [
    ("t2", None),
    ("t2 __init__.py", "'doc for t2'; print(__name__, 'loading')"),
    ("t2 sub", None),
    ("t2 sub __init__.py", ""),
    ("t2 sub subsub", None),
    ("t2 sub subsub __init__.py", "print(__name__, 'loading'); spam = 1"),
    ],
"""
import t2
print(t2.__doc__)
import t2.sub
import t2.sub.subsub
print(t2.__name__, t2.sub.__name__, t2.sub.subsub.__name__)
import t2
from t2 import *
print(dir())
from t2 import sub
from t2.sub import subsub
from t2.sub.subsub import spam
print(sub.__name__, subsub.__name__)
print(sub.subsub.__name__)
print(dir())
import t2.sub
import t2.sub.subsub
print(t2.__name__, t2.sub.__name__, t2.sub.subsub.__name__)
from t2 import *
print(dir())
"""),

    ("t3", [
    ("t3", None),
    ("t3 __init__.py", "print(__name__, 'loading')"),
    ("t3 sub", None),
    ("t3 sub __init__.py", ""),
    ("t3 sub subsub", None),
    ("t3 sub subsub __init__.py", "print(__name__, 'loading'); spam = 1"),
    ],
"""
import t3.sub.subsub
print(t3.__name__, t3.sub.__name__, t3.sub.subsub.__name__)
"""),

    ("t4", [
    ("t4.py", "print('THIS SHOULD NOT BE PRINTED (t4.py)')"),
    ("t4", None),
    ("t4 __init__.py", "print(__name__, 'loading')"),
    ("t4 sub.py", "print('THIS SHOULD NOT BE PRINTED (sub.py)')"),
    ("t4 sub", None),
    ("t4 sub __init__.py", ""),
    ("t4 sub subsub.py", "print('THIS SHOULD NOT BE PRINTED (subsub.py)')"),
    ("t4 sub subsub", None),
    ("t4 sub subsub __init__.py", "print(__name__, 'loading'); spam = 1"),
    ],
"""
from t4.sub.subsub import *
print("t4.sub.subsub.spam =", spam)
"""),

    ("t5", [
    ("t5", None),
    ("t5 __init__.py", "import t5.foo"),
    ("t5 string.py", "print(__name__, 'loading'); spam = 1"),
    ("t5 foo.py",
     "print(__name__, 'loading'); from . import string; print(string.spam)"),
     ],
"""
import t5
from t5 import *
print(dir())
import t5
print(fixdir(dir(t5)))
print(fixdir(dir(t5.foo)))
print(fixdir(dir(t5.string)))
"""),

    ("t6", [
    ("t6", None),
    ("t6 __init__.py", "__all__ = ['spam', 'ham', 'eggs']"),
    ("t6 spam.py", "print(__name__, 'loading')"),
    ("t6 ham.py", "print(__name__, 'loading')"),
    ("t6 eggs.py", "print(__name__, 'loading')"),
    ],
"""
import t6
print(fixdir(dir(t6)))
from t6 import *
print(fixdir(dir(t6)))
print(dir())
"""),

    ("t7", [
    ("t7.py", "print('Importing t7.py')"),
    ("t7", None),
    ("t7 __init__.py", "print(__name__, 'loading')"),
    ("t7 sub.py", "print('THIS SHOULD NOT BE PRINTED (sub.py)')"),
    ("t7 sub", None),
    ("t7 sub __init__.py", ""),
    ("t7 sub subsub.py", "print('THIS SHOULD NOT BE PRINTED (subsub.py)')"),
    ("t7 sub subsub", None),
    ("t7 sub subsub __init__.py", "print(__name__, 'loading'); spam = 1"),
    ],
"""
t7, sub, subsub = None, None, None
import t7 as tas
print(fixdir(dir(tas)))
verify(not t7)
from t7 import sub as subpar
print(fixdir(dir(subpar)))
verify(not t7 and not sub)
from t7.sub import subsub as subsubsub
print(fixdir(dir(subsubsub)))
verify(not t7 and not sub and not subsub)
from t7.sub.subsub import spam as ham
print("t7.sub.subsub.spam =", ham)
verify(not t7 and not sub and not subsub)
"""),

]

nontests = [
    ("x5", [], ("import a" + ".a"*400)),
    ("x6", [], ("import a" + ".a"*499)),
    ("x7", [], ("import a" + ".a"*500)),
    ("x8", [], ("import a" + ".a"*1100)),
    ("x9", [], ("import " + "a"*400)),
    ("x10", [], ("import " + "a"*500)),
    ("x11", [], ("import " + "a"*998)),
    ("x12", [], ("import " + "a"*999)),
    ("x13", [], ("import " + "a"*999)),
    ("x14", [], ("import " + "a"*2000)),
]

"""XXX Things to test

import package without __init__
import package with __init__
__init__ importing submodule
__init__ importing global module
__init__ defining variables
submodule importing other submodule
submodule importing global module
submodule import submodule via global name
from package import submodule
from package import subpackage
from package import variable (defined in __init__)
from package import * (defined in __init__)
"""

# Run the tests

args = []
if __name__ == '__main__':
    args = sys.argv[1:]
    if args and args[0] == '-q':
        verbose = 0
        del args[0]

for name, hier, code in tests:
    if args and name not in args:
        print("skipping test", name)
        continue
    print("running test", name)
    runtest(hier, code)

# Test
import sys
import imp
try:
    import sys.imp
except ImportError:
    # This is what we expect
    pass
else:
    raise TestFailed, "No ImportError exception on 'import sys.imp'"