Provide contributing docs, test suite fixes and return graphql errors

CONTRIBUTING.md

@@ -0,0 +1,97 @@
+# Contributing
+
+Thanks for helping to make gql awesome!
+
+We welcome all kinds of contributions:
+
+- Bug fixes
+- Documentation improvements
+- New features
+- Refactoring & tidying
+
+
+## Getting started
+
+If you have a specific contribution in mind, be sure to check the 
+[issues](https://github.com/graphql-python/gql/issues) 
+and [pull requests](https://github.com/graphql-python/gql/pulls) 
+in progress - someone could already be working on something similar 
+and you can help out.
+
+## Project setup
+
+### Development with virtualenv (recommended)
+
+After cloning this repo, create a virtualenv:
+
+```console
+virtualenv gql-dev
+```
+
+Activate the virtualenv and install dependencies by running:
+
+```console
+python pip install -e ".[test]"
+```
+
+If you are using Linux or MacOS, you can make use of Makefile command 
+`make dev-setup`, which is a shortcut for the above python command.
+
+### Development on Conda
+
+You must create a new env (e.g. `gql-dev`) with the following command:
+
+```sh
+conda create -n gql-dev python=3.8
+```
+
+Then activate the environment with `conda activate gql-dev`.
+
+Proceed to install all dependencies by running:
+
+```console
+python pip install -e ".[test]"
+```
+
+And you ready to start development!
+
+<!-- TODO: Provide environment.yml file for conda env --> 
+
+## Running tests
+
+After developing, the full test suite can be evaluated by running:
+
+```sh
+pytest tests --cov=gql -vv
+```
+
+If you are using Linux or MacOS, you can make use of Makefile command 
+`make tests`, which is a shortcut for the above python command.
+
+You can also test on several python environments by using tox.
+
+### Running tox on virtualenv
+
+Install tox:
+```console
+pip install tox
+```
+
+Run `tox` on your virtualenv (do not forget to activate it!) 
+and that's it! 
+
+### Running tox on Conda
+
+In order to run `tox` command on conda, install
+[tox-conda](https://github.com/tox-dev/tox-conda):
+
+```sh
+conda install -c conda-forge tox-conda
+```
+
+This install tox underneath so no need to install it before.
+
+Then uncomment the `requires = tox-conda` line on `tox.ini` file.
+
+Run `tox` and you will see all the environments being created 
+and all passing tests. :rocket:

MANIFEST.in

@@ -3,8 +3,10 @@ include MANIFEST.in
 include CODEOWNERS
 include LICENSE
 include README.md
+include CONTRIBUTING.md
 
 include dev_requirements.txt
+include Makefile
 
 include tox.ini
 

Makefile

@@ -0,0 +1,5 @@
+dev-setup:
+	python pip install -e ".[test]"
+
+tests:
+	pytest tests --cov=gql -vv

README.md

@@ -51,6 +51,9 @@ client = Client(transport=RequestsHTTPTransport(
      url='/graphql', headers={'Authorization': 'token'}), schema=schema)
 ```
 
+## Contributing
+See [CONTRIBUTING.md](contributing.md)
+
 ## License
 
 [MIT License](https://github.com/graphql-python/gql/blob/master/LICENSE)

gql/transport/requests.py

@@ -35,12 +35,16 @@ def execute(self, document, variable_values=None, timeout=None):
             'timeout': timeout or self.default_timeout,
             data_key: payload
         }
-        request = requests.post(self.url, **post_args)
-        request.raise_for_status()
-
-        result = request.json()
-        assert 'errors' in result or 'data' in result, 'Received non-compatible response "{}"'.format(result)
-        return ExecutionResult(
-            errors=result.get('errors'),
-            data=result.get('data')
-        )
+
+        response = requests.post(self.url, **post_args)
+        try:
+            result = response.json()
+            if not isinstance(result, dict):
+                raise ValueError
+        except ValueError:
+            result = {}
+
+        if 'errors' not in result and 'data' not in result:
+            response.raise_for_status()
+            raise requests.HTTPError("Server did not return a GraphQL result", response=response)
+        return ExecutionResult(errors=result.get('errors'), data=result.get('data'))

gql/utils.py

@@ -1,4 +1,4 @@
-import re
+"""Utilities to manipulate several python objects."""
 
 
 # From this response in Stackoverflow
@@ -8,14 +8,3 @@ def to_camel_case(snake_str):
     # We capitalize the first letter of each component except the first one
     # with the 'title' method and join them together.
     return components[0] + "".join(x.title() if x else '_' for x in components[1:])
-
-
-# From this response in Stackoverflow
-# http://stackoverflow.com/a/1176023/1072990
-def to_snake_case(name):
-    s1 = re.sub('(.)([A-Z][a-z]+)', r'\1_\2', name)
-    return re.sub('([a-z0-9])([A-Z])', r'\1_\2', s1).lower()
-
-
-def to_const(string):
-    return re.sub(r'[\W|^]+', '_', string).upper()

setup.py

@@ -11,9 +11,14 @@
     'pytest==4.6.9',
     'pytest-cov==2.8.1',
     'mock==3.0.5',
-    'vcrpy==3.0.0'
+    'vcrpy==3.0.0',
 ]
 
+dev_requires = [
+    'flake8==3.7.9',
+    'check-manifest>=0.40,<1',
+] + tests_require
+
 setup(
     name='gql',
     version='0.3.0',
@@ -42,6 +47,10 @@
     install_requires=install_requires,
     tests_require=tests_require,
     extras_require={
-        'test': tests_require
-    }
+        'test': tests_require,
+        'dev': dev_requires,
+    },
+    include_package_data=True,
+    zip_safe=False,
+    platforms="any",
 )