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Wed Sep 24 08:19:20 EDT 2003 · https://mail.python.org/pipermail/python-dev/2003-September/038265.html

On Wed, Sep 24, 2003 at 07:10:51AM -0500, Jeff Epler wrote:
> Perhaps a better way to fix it would be to test for a superset in
> test_mimetypes.  assert set(all) >= set('.bat', ...)

The general idea is implemented in this patch:

--- test_mimetypes.py.orig	2003-09-24 07:11:12.000000000 -0500
+++ test_mimetypes.py	2003-09-24 07:18:58.000000000 -0500
@@ -1,18 +1,21 @@
 import mimetypes
 import StringIO
 import unittest
+import sets
 
 from test import test_support
 
-# Tell it we don't know about external files:
-mimetypes.knownfiles = []
-mimetypes.inited = False
-
-
 class MimeTypesTestCase(unittest.TestCase):
     def setUp(self):
         self.db = mimetypes.MimeTypes()
 
+    def assertSuperset(self, first, second, msg=None):
+        first = sets.Set(first)
+        second = sets.Set(second)
+        if not first >= second:
+            raise self.failureException, \
+                  (msg or '%r >= %r' % (first, second))
+
     def test_default_data(self):
         eq = self.assertEqual
         eq(self.db.guess_type("foo.html"), ("text/html", None))
@@ -45,15 +48,16 @@
         eq(self.db.guess_extension('image/jpg', strict=False), '.jpg')
 
     def test_guess_all_types(self):
+        ss = self.assertSuperset
         eq = self.assertEqual
         # First try strict
         all = self.db.guess_all_extensions('text/plain', strict=True)
         all.sort()
-        eq(all, ['.bat', '.c', '.h', '.ksh', '.pl', '.txt'])
+        ss(all, ['.bat', '.c', '.h', '.ksh', '.pl', '.txt'])
         # And now non-strict
         all = self.db.guess_all_extensions('image/jpg', strict=False)
         all.sort()
-        eq(all, ['.jpg'])
+        ss(all, ['.jpg'])
         # And now for no hits
         all = self.db.guess_all_extensions('image/jpg', strict=True)
         eq(all, [])



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