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Python Source  |  2011-03-15  |  9.7 KB  |  254 lines
  1. # Test the runpy module
  2. import unittest
  3. import os
  4. import os.path
  5. import sys
  6. import tempfile
  7. from test.test_support import verbose, run_unittest, forget
  8. from runpy import _run_code, _run_module_code, run_module
  9.  
  10. # Note: This module can't safely test _run_module_as_main as it
  11. # runs its tests in the current process, which would mess with the
  12. # real __main__ module (usually test.regrtest)
  13. # See test_cmd_line_script for a test that executes that code path
  14.  
  15. # Set up the test code and expected results
  16.  
  17. class RunModuleCodeTest(unittest.TestCase):
  18.  
  19.     expected_result = ["Top level assignment", "Lower level reference"]
  20.     test_source = (
  21.         "# Check basic code execution\n"
  22.         "result = ['Top level assignment']\n"
  23.         "def f():\n"
  24.         "    result.append('Lower level reference')\n"
  25.         "f()\n"
  26.         "# Check the sys module\n"
  27.         "import sys\n"
  28.         "run_argv0 = sys.argv[0]\n"
  29.         "run_name_in_sys_modules = __name__ in sys.modules\n"
  30.         "if run_name_in_sys_modules:\n"
  31.         "   module_in_sys_modules = globals() is sys.modules[__name__].__dict__\n"
  32.         "# Check nested operation\n"
  33.         "import runpy\n"
  34.         "nested = runpy._run_module_code('x=1\\n', mod_name='<run>')\n"
  35.     )
  36.  
  37.     def test_run_code(self):
  38.         saved_argv0 = sys.argv[0]
  39.         d = _run_code(self.test_source, {})
  40.         self.failUnless(d["result"] == self.expected_result)
  41.         self.failUnless(d["__name__"] is None)
  42.         self.failUnless(d["__file__"] is None)
  43.         self.failUnless(d["__loader__"] is None)
  44.         self.failUnless(d["__package__"] is None)
  45.         self.failUnless(d["run_argv0"] is saved_argv0)
  46.         self.failUnless("run_name" not in d)
  47.         self.failUnless(sys.argv[0] is saved_argv0)
  48.  
  49.     def test_run_module_code(self):
  50.         initial = object()
  51.         name = "<Nonsense>"
  52.         file = "Some other nonsense"
  53.         loader = "Now you're just being silly"
  54.         package = '' # Treat as a top level module
  55.         d1 = dict(initial=initial)
  56.         saved_argv0 = sys.argv[0]
  57.         d2 = _run_module_code(self.test_source,
  58.                               d1,
  59.                               name,
  60.                               file,
  61.                               loader,
  62.                               package)
  63.         self.failUnless("result" not in d1)
  64.         self.failUnless(d2["initial"] is initial)
  65.         self.failUnless(d2["result"] == self.expected_result)
  66.         self.failUnless(d2["nested"]["x"] == 1)
  67.         self.failUnless(d2["__name__"] is name)
  68.         self.failUnless(d2["run_name_in_sys_modules"])
  69.         self.failUnless(d2["module_in_sys_modules"])
  70.         self.failUnless(d2["__file__"] is file)
  71.         self.failUnless(d2["run_argv0"] is file)
  72.         self.failUnless(d2["__loader__"] is loader)
  73.         self.failUnless(d2["__package__"] is package)
  74.         self.failUnless(sys.argv[0] is saved_argv0)
  75.         self.failUnless(name not in sys.modules)
  76.  
  77.  
  78. class RunModuleTest(unittest.TestCase):
  79.  
  80.     def expect_import_error(self, mod_name):
  81.         try:
  82.             run_module(mod_name)
  83.         except ImportError:
  84.             pass
  85.         else:
  86.             self.fail("Expected import error for " + mod_name)
  87.  
  88.     def test_invalid_names(self):
  89.         # Builtin module
  90.         self.expect_import_error("sys")
  91.         # Non-existent modules
  92.         self.expect_import_error("sys.imp.eric")
  93.         self.expect_import_error("os.path.half")
  94.         self.expect_import_error("a.bee")
  95.         self.expect_import_error(".howard")
  96.         self.expect_import_error("..eaten")
  97.         # Package
  98.         self.expect_import_error("logging")
  99.  
  100.     def test_library_module(self):
  101.         run_module("runpy")
  102.  
  103.     def _add_pkg_dir(self, pkg_dir):
  104.         os.mkdir(pkg_dir)
  105.         pkg_fname = os.path.join(pkg_dir, "__init__"+os.extsep+"py")
  106.         pkg_file = open(pkg_fname, "w")
  107.         pkg_file.close()
  108.         return pkg_fname
  109.  
  110.     def _make_pkg(self, source, depth):
  111.         pkg_name = "__runpy_pkg__"
  112.         test_fname = "runpy_test"+os.extsep+"py"
  113.         pkg_dir = sub_dir = tempfile.mkdtemp()
  114.         if verbose: print "  Package tree in:", sub_dir
  115.         sys.path.insert(0, pkg_dir)
  116.         if verbose: print "  Updated sys.path:", sys.path[0]
  117.         for i in range(depth):
  118.             sub_dir = os.path.join(sub_dir, pkg_name)
  119.             pkg_fname = self._add_pkg_dir(sub_dir)
  120.             if verbose: print "  Next level in:", sub_dir
  121.             if verbose: print "  Created:", pkg_fname
  122.         mod_fname = os.path.join(sub_dir, test_fname)
  123.         mod_file = open(mod_fname, "w")
  124.         mod_file.write(source)
  125.         mod_file.close()
  126.         if verbose: print "  Created:", mod_fname
  127.         mod_name = (pkg_name+".")*depth + "runpy_test"
  128.         return pkg_dir, mod_fname, mod_name
  129.  
  130.     def _del_pkg(self, top, depth, mod_name):
  131.         for entry in list(sys.modules):
  132.             if entry.startswith("__runpy_pkg__"):
  133.                 del sys.modules[entry]
  134.         if verbose: print "  Removed sys.modules entries"
  135.         del sys.path[0]
  136.         if verbose: print "  Removed sys.path entry"
  137.         for root, dirs, files in os.walk(top, topdown=False):
  138.             for name in files:
  139.                 try:
  140.                     os.remove(os.path.join(root, name))
  141.                 except OSError, ex:
  142.                     if verbose: print ex # Persist with cleaning up
  143.             for name in dirs:
  144.                 fullname = os.path.join(root, name)
  145.                 try:
  146.                     os.rmdir(fullname)
  147.                 except OSError, ex:
  148.                     if verbose: print ex # Persist with cleaning up
  149.         try:
  150.             os.rmdir(top)
  151.             if verbose: print "  Removed package tree"
  152.         except OSError, ex:
  153.             if verbose: print ex # Persist with cleaning up
  154.  
  155.     def _check_module(self, depth):
  156.         pkg_dir, mod_fname, mod_name = (
  157.                self._make_pkg("x=1\n", depth))
  158.         forget(mod_name)
  159.         try:
  160.             if verbose: print "Running from source:", mod_name
  161.             d1 = run_module(mod_name) # Read from source
  162.             self.failUnless("x" in d1)
  163.             self.failUnless(d1["x"] == 1)
  164.             del d1 # Ensure __loader__ entry doesn't keep file open
  165.             __import__(mod_name)
  166.             os.remove(mod_fname)
  167.             if verbose: print "Running from compiled:", mod_name
  168.             d2 = run_module(mod_name) # Read from bytecode
  169.             self.failUnless("x" in d2)
  170.             self.failUnless(d2["x"] == 1)
  171.             del d2 # Ensure __loader__ entry doesn't keep file open
  172.         finally:
  173.             self._del_pkg(pkg_dir, depth, mod_name)
  174.         if verbose: print "Module executed successfully"
  175.  
  176.     def _add_relative_modules(self, base_dir, source, depth):
  177.         if depth <= 1:
  178.             raise ValueError("Relative module test needs depth > 1")
  179.         pkg_name = "__runpy_pkg__"
  180.         module_dir = base_dir
  181.         for i in range(depth):
  182.             parent_dir = module_dir
  183.             module_dir = os.path.join(module_dir, pkg_name)
  184.         # Add sibling module
  185.         sibling_fname = os.path.join(module_dir, "sibling"+os.extsep+"py")
  186.         sibling_file = open(sibling_fname, "w")
  187.         sibling_file.close()
  188.         if verbose: print "  Added sibling module:", sibling_fname
  189.         # Add nephew module
  190.         uncle_dir = os.path.join(parent_dir, "uncle")
  191.         self._add_pkg_dir(uncle_dir)
  192.         if verbose: print "  Added uncle package:", uncle_dir
  193.         cousin_dir = os.path.join(uncle_dir, "cousin")
  194.         self._add_pkg_dir(cousin_dir)
  195.         if verbose: print "  Added cousin package:", cousin_dir
  196.         nephew_fname = os.path.join(cousin_dir, "nephew"+os.extsep+"py")
  197.         nephew_file = open(nephew_fname, "w")
  198.         nephew_file.close()
  199.         if verbose: print "  Added nephew module:", nephew_fname
  200.  
  201.     def _check_relative_imports(self, depth, run_name=None):
  202.         contents = r"""\
  203. from __future__ import absolute_import
  204. from . import sibling
  205. from ..uncle.cousin import nephew
  206. """
  207.         pkg_dir, mod_fname, mod_name = (
  208.                self._make_pkg(contents, depth))
  209.         try:
  210.             self._add_relative_modules(pkg_dir, contents, depth)
  211.             pkg_name = mod_name.rpartition('.')[0]
  212.             if verbose: print "Running from source:", mod_name
  213.             d1 = run_module(mod_name, run_name=run_name) # Read from source
  214.             self.failUnless("__package__" in d1)
  215.             self.failUnless(d1["__package__"] == pkg_name)
  216.             self.failUnless("sibling" in d1)
  217.             self.failUnless("nephew" in d1)
  218.             del d1 # Ensure __loader__ entry doesn't keep file open
  219.             __import__(mod_name)
  220.             os.remove(mod_fname)
  221.             if verbose: print "Running from compiled:", mod_name
  222.             d2 = run_module(mod_name, run_name=run_name) # Read from bytecode
  223.             self.failUnless("__package__" in d2)
  224.             self.failUnless(d2["__package__"] == pkg_name)
  225.             self.failUnless("sibling" in d2)
  226.             self.failUnless("nephew" in d2)
  227.             del d2 # Ensure __loader__ entry doesn't keep file open
  228.         finally:
  229.             self._del_pkg(pkg_dir, depth, mod_name)
  230.         if verbose: print "Module executed successfully"
  231.  
  232.     def test_run_module(self):
  233.         for depth in range(4):
  234.             if verbose: print "Testing package depth:", depth
  235.             self._check_module(depth)
  236.  
  237.     def test_explicit_relative_import(self):
  238.         for depth in range(2, 5):
  239.             if verbose: print "Testing relative imports at depth:", depth
  240.             self._check_relative_imports(depth)
  241.  
  242.     def test_main_relative_import(self):
  243.         for depth in range(2, 5):
  244.             if verbose: print "Testing main relative imports at depth:", depth
  245.             self._check_relative_imports(depth, "__main__")
  246.  
  247.  
  248. def test_main():
  249.     run_unittest(RunModuleCodeTest)
  250.     run_unittest(RunModuleTest)
  251.  
  252. if __name__ == "__main__":
  253.     test_main()
  254.