Add truncated out format handling

Long out values in state tests are encoded by their length instead of the
literal value in json.

Author: konradkonrad

.travis.yml

@@ -28,8 +28,6 @@ script:
 after_success:
   - travis_retry pip install coveralls
   - cd .tox/$TOX_ENV && coveralls
-after_script:
-  - cat .tox/$TOX_ENV/log/*.log; true
 notifications:
   slack:
     secure: W/UAhQ/GgYwMWrl3aiVAVOWr4WGdWrxUOX/rTB3ZgwDwGqDYLzQO5UqbsQlo1JXPZ6JOWfIPMURhHu7DSfue9dBW6xQ+NL+bFHe9lSXG4nqFK3IjezYyTBzNRJRDbGUvSSqgj6D5cwhJ8BjfUIRPbJz3CxL64KmsNXezEaMY60w=

ethereum/testutils.py

@@ -396,6 +396,8 @@ def blkhash(n):
                   'out', 'gas', 'logs', 'postStateRoot']:
             _shouldbe = params1.get(k, None)
             _reallyis = params2.get(k, None)
+            if str_to_bytes(k) == b'out' and _shouldbe[:1] in ('#', b'#'):
+                _reallyis = str_to_bytes('#%s' % ((len(_reallyis) - 2) // 2))
             if _shouldbe != _reallyis:
                 print(('Mismatch {key}: shouldbe {shouldbe_key} != reallyis {reallyis_key}.\n'
                        'post: {shouldbe_post} != {reallyis_post}').format(