# Portions Copyright (c) 2008 Nokia Corporation
"""Tests for 'site'.

Tests assume the initial paths in sys.path once the interpreter has begun
executing have not been removed.

"""
import unittest
from test.test_support import TestSkipped, TestFailed, run_unittest, TESTFN
import __builtin__
import os
import sys
import encodings
import tempfile

if sys.platform == 'symbian_s60':
    TESTFN = 'testfile'

# Need to make sure to not import 'site' if someone specified ``-S`` at the
# command-line.  Detect this by just making sure 'site' has not been imported
# already.
if "site" in sys.modules:
    import site
else:
    raise TestSkipped("importation of site.py suppressed")

class HelperFunctionsTests(unittest.TestCase):
    """Tests for helper functions.

    The setting of the encoding (set using sys.setdefaultencoding) used by
    the Unicode implementation is not tested.

    """

    def setUp(self):
        """Save a copy of sys.path"""
        self.sys_path = sys.path[:]

    def tearDown(self):
        """Restore sys.path"""
        sys.path = self.sys_path

    def test_makepath(self):
        # Test makepath() have an absolute path for its first return value
        # and a case-normalized version of the absolute path for its
        # second value.
        path_parts = ("Beginning", "End")
        original_dir = os.path.join(*path_parts)
        abs_dir, norm_dir = site.makepath(*path_parts)
        self.failUnlessEqual(os.path.abspath(original_dir), abs_dir)
        if original_dir == os.path.normcase(original_dir):
            self.failUnlessEqual(abs_dir, norm_dir)
        else:
            self.failUnlessEqual(os.path.normcase(abs_dir), norm_dir)

    def test_init_pathinfo(self):
        dir_set = site._init_pathinfo()
        for entry in [site.makepath(path)[1] for path in sys.path
                        if path and os.path.isdir(path)]:
            self.failUnless(entry in dir_set,
                            "%s from sys.path not found in set returned "
                            "by _init_pathinfo(): %s" % (entry, dir_set))

    def pth_file_tests(self, pth_file):
        """Contain common code for testing results of reading a .pth file"""
        self.failUnless(pth_file.imported in sys.modules,
                "%s not in sys.path" % pth_file.imported)
        self.failUnless(site.makepath(pth_file.good_dir_path)[0] in sys.path)
        self.failUnless(not os.path.exists(pth_file.bad_dir_path))

    def test_addpackage(self):
        # Make sure addpackage() imports if the line starts with 'import',
        # adds directories to sys.path for any line in the file that is not a
        # comment or import that is a valid directory name for where the .pth
        # file resides; invalid directories are not added
        pth_file = PthFile()
        pth_file.cleanup(prep=True)  # to make sure that nothing is
                                      # pre-existing that shouldn't be
        try:
            pth_file.create()
            site.addpackage(pth_file.base_dir, pth_file.filename, set())
            self.pth_file_tests(pth_file)
        finally:
            pth_file.cleanup()

    def test_addsitedir(self):
        # Same tests for test_addpackage since addsitedir() essentially just
        # calls addpackage() for every .pth file in the directory
        pth_file = PthFile()
        pth_file.cleanup(prep=True) # Make sure that nothing is pre-existing
                                    # that is tested for
        try:
            pth_file.create()
            site.addsitedir(pth_file.base_dir, set())
            self.pth_file_tests(pth_file)
        finally:
            pth_file.cleanup()

class PthFile(object):
    """Helper class for handling testing of .pth files"""

    def __init__(self, filename_base=TESTFN, imported="time",
                    good_dirname="__testdir__", bad_dirname="__bad"):
        """Initialize instance variables"""
        self.filename = filename_base + ".pth"
        self.base_dir = os.path.abspath('')
        self.file_path = os.path.join(self.base_dir, self.filename)
        self.imported = imported
        self.good_dirname = good_dirname
        self.bad_dirname = bad_dirname
        self.good_dir_path = os.path.join(self.base_dir, self.good_dirname)
        self.bad_dir_path = os.path.join(self.base_dir, self.bad_dirname)

    def create(self):
        """Create a .pth file with a comment, blank lines, an ``import
        <self.imported>``, a line with self.good_dirname, and a line with
        self.bad_dirname.

        Creation of the directory for self.good_dir_path (based off of
        self.good_dirname) is also performed.

        Make sure to call self.cleanup() to undo anything done by this method.

        """
        FILE = open(self.file_path, 'w')
        try:
            print>>FILE, "#import @bad module name"
            print>>FILE, "\n"
            print>>FILE, "import %s" % self.imported
            print>>FILE, self.good_dirname
            print>>FILE, self.bad_dirname
        finally:
            FILE.close()
        os.mkdir(self.good_dir_path)

    def cleanup(self, prep=False):
        """Make sure that the .pth file is deleted, self.imported is not in
        sys.modules, and that both self.good_dirname and self.bad_dirname are
        not existing directories."""
        if os.path.exists(self.file_path):
            os.remove(self.file_path)
        if prep:
            self.imported_module = sys.modules.get(self.imported)
            if self.imported_module:
                del sys.modules[self.imported]
        else:
            if self.imported_module:
                sys.modules[self.imported] = self.imported_module
        if os.path.exists(self.good_dir_path):
            os.rmdir(self.good_dir_path)
        if os.path.exists(self.bad_dir_path):
            os.rmdir(self.bad_dir_path)

class ImportSideEffectTests(unittest.TestCase):
    """Test side-effects from importing 'site'."""

    def setUp(self):
        """Make a copy of sys.path"""
        self.sys_path = sys.path[:]

    def tearDown(self):
        """Restore sys.path"""
        sys.path = self.sys_path

    def test_abs__file__(self):
        # Make sure all imported modules have their __file__ attribute
        # as an absolute path.
        # Handled by abs__file__()
        site.abs__file__()
        for module in (sys, os, __builtin__):
            try:
                self.failUnless(os.path.isabs(module.__file__), `module`)
            except AttributeError:
                continue
        # We could try everything in sys.modules; however, when regrtest.py
        # runs something like test_frozen before test_site, then we will
        # be testing things loaded *after* test_site did path normalization

    def test_no_duplicate_paths(self):
        # No duplicate paths should exist in sys.path
        # Handled by removeduppaths()
        site.removeduppaths()
        seen_paths = set()
        for path in sys.path:
            self.failUnless(path not in seen_paths)
            seen_paths.add(path)

    def test_add_build_dir(self):
        # Test that the build directory's Modules directory is used when it
        # should be.
        # XXX: implement
        pass

    def test_setting_quit(self):
        # 'quit' and 'exit' should be injected into __builtin__
        self.failUnless(hasattr(__builtin__, "quit"))
        self.failUnless(hasattr(__builtin__, "exit"))

    def test_setting_copyright(self):
        # 'copyright' and 'credits' should be in __builtin__
        self.failUnless(hasattr(__builtin__, "copyright"))
        self.failUnless(hasattr(__builtin__, "credits"))

    def test_setting_help(self):
        # 'help' should be set in __builtin__
        self.failUnless(hasattr(__builtin__, "help"))

    def test_aliasing_mbcs(self):
        if sys.platform == "win32":
            import locale
            if locale.getdefaultlocale()[1].startswith('cp'):
                for value in encodings.aliases.aliases.itervalues():
                    if value == "mbcs":
                        break
                else:
                    self.fail("did not alias mbcs")

    def test_setdefaultencoding_removed(self):
        # Make sure sys.setdefaultencoding is gone
        self.failUnless(not hasattr(sys, "setdefaultencoding"))

    def test_sitecustomize_executed(self):
        # If sitecustomize is available, it should have been imported.
        if not sys.modules.has_key("sitecustomize"):
            try:
                import sitecustomize
            except ImportError:
                pass
            else:
                self.fail("sitecustomize not imported automatically")




def test_main():
    run_unittest(HelperFunctionsTests, ImportSideEffectTests)



if __name__ == "__main__":
    test_main()
