Lib/test/test_mimetypes.py

   1 import mimetypes
   2 import StringIO
   3 import unittest
   4 from sets import Set
   5
   6 from test import test_support
   7
   8 # Tell it we don't know about external files:
   9 mimetypes.knownfiles = []
  10 mimetypes.inited = False
  11
  12
  13 class MimeTypesTestCase(unittest.TestCase):
  14     def setUp(self):
  15         self.db = mimetypes.MimeTypes()
  16
  17     def test_default_data(self):
  18         eq = self.assertEqual
  19         eq(self.db.guess_type("foo.html"), ("text/html", None))
  20         eq(self.db.guess_type("foo.tgz"), ("application/x-tar", "gzip"))
  21         eq(self.db.guess_type("foo.tar.gz"), ("application/x-tar", "gzip"))
  22         eq(self.db.guess_type("foo.tar.Z"), ("application/x-tar", "compress"))
  23
  24     def test_data_urls(self):
  25         eq = self.assertEqual
  26         guess_type = self.db.guess_type
  27         eq(guess_type("data:,thisIsTextPlain"), ("text/plain", None))
  28         eq(guess_type("data:;base64,thisIsTextPlain"), ("text/plain", None))
  29         eq(guess_type("data:text/x-foo,thisIsTextXFoo"), ("text/x-foo", None))
  30
  31     def test_file_parsing(self):
  32         eq = self.assertEqual
  33         sio = StringIO.StringIO("x-application/x-unittest pyunit\n")
  34         self.db.readfp(sio)
  35         eq(self.db.guess_type("foo.pyunit"),
  36            ("x-application/x-unittest", None))
  37         eq(self.db.guess_extension("x-application/x-unittest"), ".pyunit")
  38
  39     def test_non_standard_types(self):
  40         eq = self.assertEqual
  41         # First try strict
  42         eq(self.db.guess_type('foo.xul', strict=True), (None, None))
  43         eq(self.db.guess_extension('image/jpg', strict=True), None)
  44         # And then non-strict
  45         eq(self.db.guess_type('foo.xul', strict=False), ('text/xul', None))
  46         eq(self.db.guess_extension('image/jpg', strict=False), '.jpg')
  47
  48     def test_guess_all_types(self):
  49         eq = self.assertEqual
  50         unless = self.failUnless
  51         # First try strict.  Use a set here for testing the results because if
  52         # test_urllib2 is run before test_mimetypes, global state is modified
  53         # such that the 'all' set will have more items in it.
  54         all = Set(self.db.guess_all_extensions('text/plain', strict=True))
  55         unless(all >= Set(['.bat', '.c', '.h', '.ksh', '.pl', '.txt']))
  56         # And now non-strict
  57         all = self.db.guess_all_extensions('image/jpg', strict=False)
  58         all.sort()
  59         eq(all, ['.jpg'])
  60         # And now for no hits
  61         all = self.db.guess_all_extensions('image/jpg', strict=True)
  62         eq(all, [])
  63
  64
  65 def test_main():
  66     test_support.run_unittest(MimeTypesTestCase)
  67
  68
  69 if __name__ == "__main__":
  70     test_main()