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cpython/Lib/test/test_runpy.py

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# Test the runpy module
import unittest
import os
import os.path
import sys
import re
import tempfile
import importlib
import py_compile
from test.support import (
forget, make_legacy_pyc, run_unittest, unload, verbose, no_tracing,
create_empty_file)
from test.script_helper import (
make_pkg, make_script, make_zip_pkg, make_zip_script, temp_dir)
import runpy
from runpy import _run_code, _run_module_code, run_module, run_path
# Note: This module can't safely test _run_module_as_main as it
# runs its tests in the current process, which would mess with the
# real __main__ module (usually test.regrtest)
# See test_cmd_line_script for a test that executes that code path
# Set up the test code and expected results
example_source = """\
# Check basic code execution
result = ['Top level assignment']
def f():
result.append('Lower level reference')
f()
del f
# Check the sys module
import sys
run_argv0 = sys.argv[0]
run_name_in_sys_modules = __name__ in sys.modules
module_in_sys_modules = (run_name_in_sys_modules and
globals() is sys.modules[__name__].__dict__)
# Check nested operation
import runpy
nested = runpy._run_module_code('x=1\\n', mod_name='<run>')
"""
implicit_namespace = {
"__name__": None,
"__file__": None,
"__cached__": None,
"__package__": None,
"__doc__": None,
# "__spec__": None, # XXX Uncomment.
}
example_namespace = {
"sys": sys,
"runpy": runpy,
"result": ["Top level assignment", "Lower level reference"],
"run_argv0": sys.argv[0],
"run_name_in_sys_modules": False,
"module_in_sys_modules": False,
"nested": dict(implicit_namespace,
x=1, __name__="<run>", __loader__=None, __spec__=None),
}
example_namespace.update(implicit_namespace)
class CodeExecutionMixin:
# Issue #15230 (run_path not handling run_name correctly) highlighted a
# problem with the way arguments were being passed from higher level APIs
# down to lower level code. This mixin makes it easier to ensure full
# testing occurs at those upper layers as well, not just at the utility
# layer
def assertNamespaceMatches(self, result_ns, expected_ns):
"""Check two namespaces match.
Ignores any unspecified interpreter created names
"""
# Impls are permitted to add extra names, so filter them out
for k in list(result_ns):
if k.startswith("__") and k.endswith("__"):
if k not in expected_ns:
result_ns.pop(k)
if k not in expected_ns["nested"]:
result_ns["nested"].pop(k)
# Don't use direct dict comparison - the diffs are too hard to debug
self.assertEqual(set(result_ns), set(expected_ns))
for k in result_ns:
actual = (k, result_ns[k])
expected = (k, expected_ns[k])
self.assertEqual(actual, expected)
def check_code_execution(self, create_namespace, expected_namespace):
"""Check that an interface runs the example code correctly
First argument is a callable accepting the initial globals and
using them to create the actual namespace
Second argument is the expected result
"""
sentinel = object()
expected_ns = expected_namespace.copy()
run_name = expected_ns["__name__"]
saved_argv0 = sys.argv[0]
saved_mod = sys.modules.get(run_name, sentinel)
# Check without initial globals
result_ns = create_namespace(None)
self.assertNamespaceMatches(result_ns, expected_ns)
self.assertIs(sys.argv[0], saved_argv0)
self.assertIs(sys.modules.get(run_name, sentinel), saved_mod)
# And then with initial globals
initial_ns = {"sentinel": sentinel}
expected_ns["sentinel"] = sentinel
result_ns = create_namespace(initial_ns)
self.assertIsNot(result_ns, initial_ns)
self.assertNamespaceMatches(result_ns, expected_ns)
self.assertIs(sys.argv[0], saved_argv0)
self.assertIs(sys.modules.get(run_name, sentinel), saved_mod)
class ExecutionLayerTestCase(unittest.TestCase, CodeExecutionMixin):
"""Unit tests for runpy._run_code and runpy._run_module_code"""
def test_run_code(self):
expected_ns = example_namespace.copy()
expected_ns.update({
"__loader__": None,
})
def create_ns(init_globals):
return _run_code(example_source, {}, init_globals)
self.check_code_execution(create_ns, expected_ns)
def test_run_module_code(self):
mod_name = "<Nonsense>"
mod_fname = "Some other nonsense"
mod_loader = "Now you're just being silly"
mod_package = '' # Treat as a top level module
expected_ns = example_namespace.copy()
expected_ns.update({
"__name__": mod_name,
"__file__": mod_fname,
"__loader__": mod_loader,
"__package__": mod_package,
"run_argv0": mod_fname,
"run_name_in_sys_modules": True,
"module_in_sys_modules": True,
})
def create_ns(init_globals):
return _run_module_code(example_source,
init_globals,
mod_name,
mod_fname,
mod_loader,
mod_package)
self.check_code_execution(create_ns, expected_ns)
# TODO: Use self.addCleanup to get rid of a lot of try-finally blocks
class RunModuleTestCase(unittest.TestCase, CodeExecutionMixin):
"""Unit tests for runpy.run_module"""
def expect_import_error(self, mod_name):
try:
run_module(mod_name)
except ImportError:
pass
else:
self.fail("Expected import error for " + mod_name)
def test_invalid_names(self):
# Builtin module
self.expect_import_error("sys")
# Non-existent modules
self.expect_import_error("sys.imp.eric")
self.expect_import_error("os.path.half")
self.expect_import_error("a.bee")
self.expect_import_error(".howard")
self.expect_import_error("..eaten")
# Package without __main__.py
self.expect_import_error("multiprocessing")
def test_library_module(self):
self.assertEqual(run_module("runpy")["__name__"], "runpy")
def _add_pkg_dir(self, pkg_dir):
os.mkdir(pkg_dir)
pkg_fname = os.path.join(pkg_dir, "__init__.py")
create_empty_file(pkg_fname)
return pkg_fname
def _make_pkg(self, source, depth, mod_base="runpy_test"):
pkg_name = "__runpy_pkg__"
test_fname = mod_base+os.extsep+"py"
pkg_dir = sub_dir = os.path.realpath(tempfile.mkdtemp())
if verbose > 1: print(" Package tree in:", sub_dir)
sys.path.insert(0, pkg_dir)
if verbose > 1: print(" Updated sys.path:", sys.path[0])
for i in range(depth):
sub_dir = os.path.join(sub_dir, pkg_name)
pkg_fname = self._add_pkg_dir(sub_dir)
if verbose > 1: print(" Next level in:", sub_dir)
if verbose > 1: print(" Created:", pkg_fname)
mod_fname = os.path.join(sub_dir, test_fname)
mod_file = open(mod_fname, "w")
mod_file.write(source)
mod_file.close()
if verbose > 1: print(" Created:", mod_fname)
mod_name = (pkg_name+".")*depth + mod_base
return pkg_dir, mod_fname, mod_name
def _del_pkg(self, top, depth, mod_name):
for entry in list(sys.modules):
if entry.startswith("__runpy_pkg__"):
del sys.modules[entry]
if verbose > 1: print(" Removed sys.modules entries")
del sys.path[0]
if verbose > 1: print(" Removed sys.path entry")
for root, dirs, files in os.walk(top, topdown=False):
for name in files:
try:
os.remove(os.path.join(root, name))
except OSError as ex:
if verbose > 1: print(ex) # Persist with cleaning up
for name in dirs:
fullname = os.path.join(root, name)
try:
os.rmdir(fullname)
except OSError as ex:
if verbose > 1: print(ex) # Persist with cleaning up
try:
os.rmdir(top)
if verbose > 1: print(" Removed package tree")
except OSError as ex:
if verbose > 1: print(ex) # Persist with cleaning up
def _fix_ns_for_legacy_pyc(self, ns, alter_sys):
char_to_add = "c" if __debug__ else "o"
ns["__file__"] += char_to_add
if alter_sys:
ns["run_argv0"] += char_to_add
def _check_module(self, depth, alter_sys=False):
pkg_dir, mod_fname, mod_name = (
self._make_pkg(example_source, depth))
forget(mod_name)
expected_ns = example_namespace.copy()
expected_ns.update({
"__name__": mod_name,
"__file__": mod_fname,
"__package__": mod_name.rpartition(".")[0],
# "__spec__": None, # XXX Needs to be set.
})
if alter_sys:
expected_ns.update({
"run_argv0": mod_fname,
"run_name_in_sys_modules": True,
"module_in_sys_modules": True,
})
def create_ns(init_globals):
return run_module(mod_name, init_globals, alter_sys=alter_sys)
try:
if verbose > 1: print("Running from source:", mod_name)
self.check_code_execution(create_ns, expected_ns)
importlib.invalidate_caches()
__import__(mod_name)
os.remove(mod_fname)
if not sys.dont_write_bytecode:
make_legacy_pyc(mod_fname)
unload(mod_name) # In case loader caches paths
importlib.invalidate_caches()
if verbose > 1: print("Running from compiled:", mod_name)
self._fix_ns_for_legacy_pyc(expected_ns, alter_sys)
self.check_code_execution(create_ns, expected_ns)
finally:
self._del_pkg(pkg_dir, depth, mod_name)
if verbose > 1: print("Module executed successfully")
def _check_package(self, depth, alter_sys=False):
pkg_dir, mod_fname, mod_name = (
self._make_pkg(example_source, depth, "__main__"))
pkg_name = mod_name.rpartition(".")[0]
forget(mod_name)
expected_ns = example_namespace.copy()
expected_ns.update({
"__name__": mod_name,
"__file__": mod_fname,
"__package__": pkg_name,
# "__spec__": None, # XXX Needs to be set.
})
if alter_sys:
expected_ns.update({
"run_argv0": mod_fname,
"run_name_in_sys_modules": True,
"module_in_sys_modules": True,
})
def create_ns(init_globals):
return run_module(pkg_name, init_globals, alter_sys=alter_sys)
try:
if verbose > 1: print("Running from source:", pkg_name)
self.check_code_execution(create_ns, expected_ns)
importlib.invalidate_caches()
__import__(mod_name)
os.remove(mod_fname)
if not sys.dont_write_bytecode:
make_legacy_pyc(mod_fname)
unload(mod_name) # In case loader caches paths
if verbose > 1: print("Running from compiled:", pkg_name)
importlib.invalidate_caches()
self._fix_ns_for_legacy_pyc(expected_ns, alter_sys)
self.check_code_execution(create_ns, expected_ns)
finally:
self._del_pkg(pkg_dir, depth, pkg_name)
if verbose > 1: print("Package executed successfully")
def _add_relative_modules(self, base_dir, source, depth):
if depth <= 1:
raise ValueError("Relative module test needs depth > 1")
pkg_name = "__runpy_pkg__"
module_dir = base_dir
for i in range(depth):
parent_dir = module_dir
module_dir = os.path.join(module_dir, pkg_name)
# Add sibling module
sibling_fname = os.path.join(module_dir, "sibling.py")
create_empty_file(sibling_fname)
if verbose > 1: print(" Added sibling module:", sibling_fname)
# Add nephew module
uncle_dir = os.path.join(parent_dir, "uncle")
self._add_pkg_dir(uncle_dir)
if verbose > 1: print(" Added uncle package:", uncle_dir)
cousin_dir = os.path.join(uncle_dir, "cousin")
self._add_pkg_dir(cousin_dir)
if verbose > 1: print(" Added cousin package:", cousin_dir)
nephew_fname = os.path.join(cousin_dir, "nephew.py")
create_empty_file(nephew_fname)
if verbose > 1: print(" Added nephew module:", nephew_fname)
def _check_relative_imports(self, depth, run_name=None):
contents = r"""\
from __future__ import absolute_import
from . import sibling
from ..uncle.cousin import nephew
"""
pkg_dir, mod_fname, mod_name = (
self._make_pkg(contents, depth))
if run_name is None:
expected_name = mod_name
else:
expected_name = run_name
try:
self._add_relative_modules(pkg_dir, contents, depth)
pkg_name = mod_name.rpartition('.')[0]
if verbose > 1: print("Running from source:", mod_name)
d1 = run_module(mod_name, run_name=run_name) # Read from source
self.assertEqual(d1["__name__"], expected_name)
self.assertEqual(d1["__package__"], pkg_name)
self.assertIn("sibling", d1)
self.assertIn("nephew", d1)
del d1 # Ensure __loader__ entry doesn't keep file open
importlib.invalidate_caches()
__import__(mod_name)
os.remove(mod_fname)
if not sys.dont_write_bytecode:
make_legacy_pyc(mod_fname)
unload(mod_name) # In case the loader caches paths
if verbose > 1: print("Running from compiled:", mod_name)
importlib.invalidate_caches()
d2 = run_module(mod_name, run_name=run_name) # Read from bytecode
self.assertEqual(d2["__name__"], expected_name)
self.assertEqual(d2["__package__"], pkg_name)
self.assertIn("sibling", d2)
self.assertIn("nephew", d2)
del d2 # Ensure __loader__ entry doesn't keep file open
finally:
self._del_pkg(pkg_dir, depth, mod_name)
if verbose > 1: print("Module executed successfully")
def test_run_module(self):
for depth in range(4):
if verbose > 1: print("Testing package depth:", depth)
self._check_module(depth)
def test_run_package(self):
for depth in range(1, 4):
if verbose > 1: print("Testing package depth:", depth)
self._check_package(depth)
def test_run_module_alter_sys(self):
for depth in range(4):
if verbose > 1: print("Testing package depth:", depth)
self._check_module(depth, alter_sys=True)
def test_run_package_alter_sys(self):
for depth in range(1, 4):
if verbose > 1: print("Testing package depth:", depth)
self._check_package(depth, alter_sys=True)
def test_explicit_relative_import(self):
for depth in range(2, 5):
if verbose > 1: print("Testing relative imports at depth:", depth)
self._check_relative_imports(depth)
def test_main_relative_import(self):
for depth in range(2, 5):
if verbose > 1: print("Testing main relative imports at depth:", depth)
self._check_relative_imports(depth, "__main__")
def test_run_name(self):
depth = 1
run_name = "And now for something completely different"
pkg_dir, mod_fname, mod_name = (
self._make_pkg(example_source, depth))
forget(mod_name)
expected_ns = example_namespace.copy()
expected_ns.update({
"__name__": run_name,
"__file__": mod_fname,
"__package__": mod_name.rpartition(".")[0],
})
def create_ns(init_globals):
return run_module(mod_name, init_globals, run_name)
try:
self.check_code_execution(create_ns, expected_ns)
finally:
self._del_pkg(pkg_dir, depth, mod_name)
def test_pkgutil_walk_packages(self):
# This is a dodgy hack to use the test_runpy infrastructure to test
# issue #15343. Issue #15348 declares this is indeed a dodgy hack ;)
import pkgutil
max_depth = 4
base_name = "__runpy_pkg__"
package_suffixes = ["uncle", "uncle.cousin"]
module_suffixes = ["uncle.cousin.nephew", base_name + ".sibling"]
expected_packages = set()
expected_modules = set()
for depth in range(1, max_depth):
pkg_name = ".".join([base_name] * depth)
expected_packages.add(pkg_name)
for name in package_suffixes:
expected_packages.add(pkg_name + "." + name)
for name in module_suffixes:
expected_modules.add(pkg_name + "." + name)
pkg_name = ".".join([base_name] * max_depth)
expected_packages.add(pkg_name)
expected_modules.add(pkg_name + ".runpy_test")
pkg_dir, mod_fname, mod_name = (
self._make_pkg("", max_depth))
self.addCleanup(self._del_pkg, pkg_dir, max_depth, mod_name)
for depth in range(2, max_depth+1):
self._add_relative_modules(pkg_dir, "", depth)
for finder, mod_name, ispkg in pkgutil.walk_packages([pkg_dir]):
self.assertIsInstance(finder,
importlib.machinery.FileFinder)
if ispkg:
expected_packages.remove(mod_name)
else:
expected_modules.remove(mod_name)
self.assertEqual(len(expected_packages), 0, expected_packages)
self.assertEqual(len(expected_modules), 0, expected_modules)
class RunPathTestCase(unittest.TestCase, CodeExecutionMixin):
"""Unit tests for runpy.run_path"""
def _make_test_script(self, script_dir, script_basename, source=None):
if source is None:
source = example_source
return make_script(script_dir, script_basename, source)
def _check_script(self, script_name, expected_name, expected_file,
expected_argv0):
# First check is without run_name
def create_ns(init_globals):
return run_path(script_name, init_globals)
expected_ns = example_namespace.copy()
expected_ns.update({
"__name__": expected_name,
"__file__": expected_file,
"__package__": "",
"run_argv0": expected_argv0,
"run_name_in_sys_modules": True,
"module_in_sys_modules": True,
})
self.check_code_execution(create_ns, expected_ns)
# Second check makes sure run_name works in all cases
run_name = "prove.issue15230.is.fixed"
def create_ns(init_globals):
return run_path(script_name, init_globals, run_name)
expected_ns["__name__"] = run_name
expected_ns["__package__"] = run_name.rpartition(".")[0]
self.check_code_execution(create_ns, expected_ns)
def _check_import_error(self, script_name, msg):
msg = re.escape(msg)
self.assertRaisesRegex(ImportError, msg, run_path, script_name)
def test_basic_script(self):
with temp_dir() as script_dir:
mod_name = 'script'
script_name = self._make_test_script(script_dir, mod_name)
self._check_script(script_name, "<run_path>", script_name,
script_name)
def test_script_compiled(self):
with temp_dir() as script_dir:
mod_name = 'script'
script_name = self._make_test_script(script_dir, mod_name)
compiled_name = py_compile.compile(script_name, doraise=True)
os.remove(script_name)
self._check_script(compiled_name, "<run_path>", compiled_name,
compiled_name)
def test_directory(self):
with temp_dir() as script_dir:
mod_name = '__main__'
script_name = self._make_test_script(script_dir, mod_name)
self._check_script(script_dir, "<run_path>", script_name,
script_dir)
def test_directory_compiled(self):
with temp_dir() as script_dir:
mod_name = '__main__'
script_name = self._make_test_script(script_dir, mod_name)
compiled_name = py_compile.compile(script_name, doraise=True)
os.remove(script_name)
if not sys.dont_write_bytecode:
legacy_pyc = make_legacy_pyc(script_name)
self._check_script(script_dir, "<run_path>", legacy_pyc,
script_dir)
def test_directory_error(self):
with temp_dir() as script_dir:
mod_name = 'not_main'
script_name = self._make_test_script(script_dir, mod_name)
msg = "can't find '__main__' module in %r" % script_dir
self._check_import_error(script_dir, msg)
def test_zipfile(self):
with temp_dir() as script_dir:
mod_name = '__main__'
script_name = self._make_test_script(script_dir, mod_name)
zip_name, fname = make_zip_script(script_dir, 'test_zip', script_name)
self._check_script(zip_name, "<run_path>", fname, zip_name)
def test_zipfile_compiled(self):
with temp_dir() as script_dir:
mod_name = '__main__'
script_name = self._make_test_script(script_dir, mod_name)
compiled_name = py_compile.compile(script_name, doraise=True)
zip_name, fname = make_zip_script(script_dir, 'test_zip',
compiled_name)
self._check_script(zip_name, "<run_path>", fname, zip_name)
def test_zipfile_error(self):
with temp_dir() as script_dir:
mod_name = 'not_main'
script_name = self._make_test_script(script_dir, mod_name)
zip_name, fname = make_zip_script(script_dir, 'test_zip', script_name)
msg = "can't find '__main__' module in %r" % zip_name
self._check_import_error(zip_name, msg)
@no_tracing
def test_main_recursion_error(self):
with temp_dir() as script_dir, temp_dir() as dummy_dir:
mod_name = '__main__'
source = ("import runpy\n"
"runpy.run_path(%r)\n") % dummy_dir
script_name = self._make_test_script(script_dir, mod_name, source)
zip_name, fname = make_zip_script(script_dir, 'test_zip', script_name)
msg = "recursion depth exceeded"
self.assertRaisesRegex(RuntimeError, msg, run_path, zip_name)
def test_encoding(self):
with temp_dir() as script_dir:
filename = os.path.join(script_dir, 'script.py')
with open(filename, 'w', encoding='latin1') as f:
f.write("""
#coding:latin1
s = "non-ASCII: h\xe9"
""")
result = run_path(filename)
self.assertEqual(result['s'], "non-ASCII: h\xe9")
if __name__ == "__main__":
unittest.main()
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