Fix coverage reporting (#72)

Fix coverage reporting and migrates tool configs to pyproject.toml.

Author: georgemarshall

.checkignore

@@ -40,10 +40,12 @@ jobs:
         run: python -m pip install --upgrade pip setuptools virtualenv wheel
 
       - name: Install dependencies
-        run: python -m pip install --upgrade codecov tox tox-py
+        run: python -m pip install --upgrade coverage[toml] tox tox-py
 
       - name: Run tox targets for ${{ matrix.python-version }}
-        run: tox --py current
+        run: |
+          tox --py current
+          coverage xml
 
-      - name: Upload coverage
-        run: codecov -e TOXENV,DJANGO
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v3

.coveragerc

@@ -6,5 +6,41 @@ build-backend = "setuptools.build_meta"
 target-version = ['py37']
 skip-string-normalization = true
 
+[tool.coverage.run]
+branch = true
+source = ['django_cryptography']
+
+[tool.coverage.report]
+exclude_lines = [
+    'if self.debug:',
+    'pragma: no cover',
+    'raise NotImplementedError',
+    'if __name__ == .__main__.:',
+]
+ignore_errors = true
+omit = ['docs/*', 'tests/*']
+
 [tool.isort]
 profile = 'black'
+
+[tool.tox]
+# language=ini
+legacy_tox_ini = """
+[tox]
+envlist =
+    {py37,py38,py39}-django22,
+    {py37,py38,py39}-django32,
+    {py38,py39,py310}-django40,
+    {py38,py39,py310}-djangomain,
+isolated_build = True
+
+[testenv]
+deps =
+    coverage[toml]
+    django22: Django>=2.2,<2.3
+    django32: Django>=3.2,<3.3
+    django40: Django>=4.0,<4.1
+    djangomain: https://github.com/django/django/archive/main.tar.gz
+commands =
+    {envpython} -m coverage run --context='{envname}' runtests.py {posargs}
+"""