Test and lint config updates

setup.cfg

@@ -2,4 +2,4 @@
 universal=1
 [flake8]
 max-line-length=120
-ignore: E301, E302, W504
+ignore: E401, W504

src/pyotp/__init__.py

@@ -6,6 +6,7 @@
 from pyotp.totp import TOTP  # noqa
 from . import utils  # noqa
 
+
 def random_base32(length=16, random=None,
                   chars=list('ABCDEFGHIJKLMNOPQRSTUVWXYZ234567')):
     if length < 16:
@@ -23,6 +24,7 @@ def random_base32(length=16, random=None,
         for _ in range(length)
     )
 
+
 def random_hex(length=32, random=None,
                chars=list('ABCDEF0123456789')):
     if length < 32:

src/pyotp/hotp.py

@@ -4,6 +4,7 @@
 from .otp import OTP
 from .compat import str
 
+
 class HOTP(OTP):
     """
     Handler for HMAC-based OTP counters.

src/pyotp/otp.py

@@ -5,6 +5,7 @@
 import hmac
 from .compat import str
 
+
 class OTP(object):
     """
     Base class for OTP handlers.

src/pyotp/totp.py

@@ -7,6 +7,7 @@
 from .otp import OTP
 from .compat import str
 
+
 class TOTP(OTP):
     """
     Handler for time-based OTP counters.

test.py

@@ -14,6 +14,7 @@
 sys.path.insert(0, os.path.join(os.path.dirname(__file__), 'src'))
 import pyotp  # noqa
 
+
 class HOTPExampleValuesFromTheRFC(unittest.TestCase):
     def test_match_rfc(self):
         # 12345678901234567890 in Bas32
@@ -236,6 +237,12 @@ def test_provisioning_uri(self):
     def test_random_key_generation(self):
         self.assertEqual(len(pyotp.random_base32()), 16)
         self.assertEqual(len(pyotp.random_base32(length=20)), 20)
+        self.assertEqual(len(pyotp.random_hex()), 32)
+        self.assertEqual(len(pyotp.random_hex(length=64)), 64)
+        with self.assertRaises(Exception):
+            pyotp.random_base32(length=15)
+        with self.assertRaises(Exception):
+            pyotp.random_hex(length=24)
 
 
 class CompareDigestTest(unittest.TestCase):
@@ -305,5 +312,6 @@ def now(cls, **kwargs):
         timecop = self
         return FrozenDateTime
 
+
 if __name__ == '__main__':
     unittest.main()