Use src layout to make sure we test the right thing

Author: Cito

.coveragerc

@@ -1,6 +1,6 @@
 [run]
 branch = True
-source = graphql
+source = src
 
 [report]
 exclude_lines =

.travis.yml

@@ -23,7 +23,7 @@ install:
   - poetry install
 
 script:
-   - tox -e $TOXENV -- --cov-report term-missing --cov=graphql
+   - tox -e $TOXENV -- --cov-report term-missing --cov=src
 
 after_success:
    - codecov

MANIFEST.in

@@ -13,7 +13,7 @@ include tox.ini
 include poetry.lock
 include pyproject.toml
 
-graft graphql_relay
+graft src/graphql_relay
 graft tests
 recursive-include docs *.rst conf.py Makefile make.bat *.jpg *.png *.gif
 prune docs/_build

README.md

@@ -245,11 +245,23 @@ You can then run the complete test suite like this:
 poetry run pytest
 ```
 
-Use [tox](https://tox.readthedocs.io/) to run the test suite with different
-Python versions and perform additional testing on the code base. You need
-to install and run tox separately, as it uses its own virtual environments.
+In order to run only a part of the tests with increased verbosity,
+you can add pytest options, like this:
+
+```sh
+poetry run pytest tests/node -vv
+```
+
+In order to check the code style with flake8, use this:
+
+```sh
+poetry run flake8
+```
+
+Use the `tox` command to run the test suite with different
+Python versions and perform all additional source code checks.
 You can also restrict tox to an individual environment, like this:
 
 ```sh
-tox -e py37
+petry run tox -e py37
 ```

poetry.lock

@@ -23,7 +23,7 @@ classifiers = [
     "Programming Language :: Python :: 3.7"
 ]
 packages = [
-    { include = "graphql_relay" },
+    { include = "graphql_relay", from = "src" },
 ]
 
 [tool.poetry.dependencies]
@@ -39,6 +39,7 @@ black = ">=19.3b0"
 flake8 = "^3.7"
 codecov = "^2"
 check-manifest = ">=0.39"
+tox = "^3.13"
 
 [tool.black]
 target-version = ['py36', 'py37', 'py38']

pyproject.toml

@@ -1,7 +1,7 @@
 from re import search
 from setuptools import setup, find_packages
 
-with open('graphql_relay/version.py') as version_file:
+with open('src/graphql_relay/version.py') as version_file:
     version = search('version = "(.*)"', version_file.read()).group(1)
 
 with open('README.md') as readme_file:
@@ -29,7 +29,8 @@
         'Programming Language :: Python :: Implementation :: PyPy',
     ],
     install_requires=['graphql-core-next>=1.0.5'],
-    python_requires='>=3.6',
-    packages=find_packages(include=['graphql_relay']),
+    python_requires='>=3.6,<4',
+    packages=find_packages('src'),
+    package_dir={'': 'src'},
     zip_safe=False,
 )