Add idna version info to requests.help

tests/test_help.py

@@ -19,3 +19,22 @@ def test_system_ssl_py26():
 def test_system_ssl():
     """Verify we're actually setting system_ssl when it should be available."""
     assert info()['system_ssl']['version'] != ''
+
+
+class VersionedPackage(object):
+    def __init__(self, version):
+        self.__version__ = version
+
+
+def test_idna_without_version_attribute(mocker):
+    """Older versions of IDNA don't provide a __version__ attribute, verify
+    that if we have such a package, we don't blow up.
+    """
+    mocker.patch('requests.help.idna', new=None)
+    assert info()['idna'] == {'version': ''}
+
+
+def test_idna_with_version_attribute(mocker):
+    """Verify we're actually setting idna version when it should be available."""
+    mocker.patch('requests.help.idna', new=VersionedPackage('2.6'))
+    assert info()['idna'] == {'version': '2.6'}