add coverage support, and cover a line, and mark a couple lines no cover

ui/Makefile

@@ -1,6 +1,6 @@
 test: fixtures/sample.data.pasn1
 	(. ./p/bin/activate && \
-		(echo cli.py | entr python -m unittest cli))
+		(echo cli.py | entr sh -c 'python -m coverage run -m unittest cli && coverage report -m --omit=p/\*'))
 
 env:
 	virtualenv p

ui/cli.py

@@ -77,7 +77,7 @@ class MetaData(MDBase):
 def _trytodict(o):
 	try:
 		return 'dict', o.__to_dict__()
-	except Exception:
+	except Exception:	# pragma: no cover
 		raise TypeError('unable to find __to_dict__ on %s' % type(o))
 
 _asn1coder = pasn1.ASN1DictCoder(coerce=_trytodict)
@@ -228,6 +228,7 @@ class _TestCases(unittest.TestCase):
 	def test_makehash(self):
 		self.assertRaises(ValueError, ObjectStore.makehash, 'slkj')
 		self.assertRaises(ValueError, ObjectStore.makehash, 'sha256:91751cee0a1ab8414400238a761411daa29643ab4b8243e9a91649e25be53ADA')
+		self.assertRaises(ValueError, ObjectStore.makehash, 'bogushash:9e0a1ab8414400238a761411daa29643ab4b8243e9a91649e25be53ADA', strict=False)
 
 		self.assertEqual(ObjectStore.makehash('cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e', strict=False), 'sha512:cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e')
 		self.assertEqual(ObjectStore.makehash('e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855', strict=False), 'sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855')

ui/requirements.txt

@@ -1,2 +1,3 @@
 urwid
 -e git://github.com/jmgurney/pasn1@27ff594a2609c07205753ce24f74d8f45a7ea418#egg=pasn1
+coverage