# Test the runpy module

import unittest

import os

import os.path

import sys

import tempfile

from test.test_support import verbose, run_unittest

from runpy import _run_module_code, run_module

# Set up the test code and expected results

class RunModuleCodeTest(unittest.TestCase):

    expected_result = ["Top level assignment", "Lower level reference"]

    test_source = (

        "# Check basic code execution\n"

        "result = ['Top level assignment']\n"

        "def f():\n"

        "    result.append('Lower level reference')\n"

        "f()\n"

        "# Check the sys module\n"

        "import sys\n"

        "run_argv0 = sys.argv[0]\n"

        "if __name__ in sys.modules:\n"

        "    run_name = sys.modules[__name__].__name__\n"

        "# Check nested operation\n"

        "import runpy\n"

        "nested = runpy._run_module_code('x=1\\n', mod_name='<run>',\n"

        "                                          alter_sys=True)\n"

    )

    def test_run_module_code(self):

        initial = object()

        name = "<Nonsense>"

        file = "Some other nonsense"

        loader = "Now you're just being silly"

        d1 = dict(initial=initial)

        saved_argv0 = sys.argv[0]

        d2 = _run_module_code(self.test_source,

                              d1,

                              name,

                              file,

                              loader,

                              True)

        self.failUnless("result" not in d1)

        self.failUnless(d2["initial"] is initial)

        self.failUnless(d2["result"] == self.expected_result)

        self.failUnless(d2["nested"]["x"] == 1)

        self.failUnless(d2["__name__"] is name)

        self.failUnless(d2["run_name"] is name)

        self.failUnless(d2["__file__"] is file)

        self.failUnless(d2["run_argv0"] is file)

        self.failUnless(d2["__loader__"] is loader)

        self.failUnless(sys.argv[0] is saved_argv0)

        self.failUnless(name not in sys.modules)

    def test_run_module_code_defaults(self):

        saved_argv0 = sys.argv[0]

        d = _run_module_code(self.test_source)

        self.failUnless(d["result"] == self.expected_result)

        self.failUnless(d["__name__"] is None)

        self.failUnless(d["__file__"] is None)

        self.failUnless(d["__loader__"] is None)

        self.failUnless(d["run_argv0"] is saved_argv0)

        self.failUnless("run_name" not in d)

        self.failUnless(sys.argv[0] is saved_argv0)

class RunModuleTest(unittest.TestCase):

    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):

        self.expect_import_error("sys")

        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")

    def test_library_module(self):

        run_module("runpy")

    def _make_pkg(self, source, depth):

        pkg_name = "__runpy_pkg__"

        init_fname = "__init__"+os.extsep+"py"

        test_fname = "runpy_test"+os.extsep+"py"

        pkg_dir = sub_dir = tempfile.mkdtemp()

        if verbose: print "  Package tree in:", sub_dir

        sys.path.insert(0, pkg_dir)

        if verbose: print "  Updated sys.path:", sys.path[0]

        for i in range(depth):

            sub_dir = os.path.join(sub_dir, pkg_name)

            os.mkdir(sub_dir)

            if verbose: print "  Next level in:", sub_dir

            pkg_fname = os.path.join(sub_dir, init_fname)

            pkg_file = open(pkg_fname, "w")

            pkg_file.close()

            if verbose: 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: print "  Created:", mod_fname

        mod_name = (pkg_name+".")*depth + "runpy_test"

        return pkg_dir, mod_fname, mod_name

    def _del_pkg(self, top, depth, mod_name):

        for i in range(depth+1): # Don't forget the module itself

            parts = mod_name.rsplit(".", i)

            entry = parts[0]

            try:

                del sys.modules[entry]

            except KeyError, ex:

                if verbose: print ex # Persist with cleaning up

        if verbose: print "  Removed sys.modules entries"

        del sys.path[0]

        if verbose: 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, ex:

                    if verbose: print ex # Persist with cleaning up

            for name in dirs:

                fullname = os.path.join(root, name)

                try:

                    os.rmdir(fullname)

                except OSError, ex:

                    if verbose: print ex # Persist with cleaning up

        try:

            os.rmdir(top)

            if verbose: print "  Removed package tree"

        except OSError, ex:

            if verbose: print ex # Persist with cleaning up

    def _check_module(self, depth):

        pkg_dir, mod_fname, mod_name = (

               self._make_pkg("x=1\n", depth))

        try:

            if verbose: print "Running from source:", mod_name

            d1 = run_module(mod_name) # Read from source

            self.failUnless(d1["x"] == 1)

            del d1 # Ensure __loader__ entry doesn't keep file open

            __import__(mod_name)

            os.remove(mod_fname)

            if verbose: print "Running from compiled:", mod_name

            d2 = run_module(mod_name) # Read from bytecode

            self.failUnless(d2["x"] == 1)

            del d2 # Ensure __loader__ entry doesn't keep file open

        finally:

            self._del_pkg(pkg_dir, depth, mod_name)

        if verbose: print "Module executed successfully"

    def test_run_module(self):

        for depth in range(4):

            if verbose: print "Testing package depth:", depth

            self._check_module(depth)

def test_main():

    run_unittest(RunModuleCodeTest)

    run_unittest(RunModuleTest)

if __name__ == "__main__":

    test_main()