test: Cover all functionality with tests

Ensure that `pre-commit-run-hook-entry` as well as
`pre-commit-run-black-entry` works as expected.

Which means to ensure that library supports all pre-commit hooks enabled
for the repo, especially:

- `black` for Python files formatting
- `flake8` & `mypy` for Python files linting

.flake8

@@ -1,5 +1,5 @@
 [flake8]
-application-import-names = pre_commit_which
+application-import-names = pre_commit_run_hook_entry
 import-order-style = smarkets
 inline-quotes = double
 max-complexity = 15

.github/workflows/ci.yml

@@ -8,6 +8,7 @@ on:
     branches: ["master"]
 
 env:
+  COVERALLS_VERSION: "2.0.0"
   DEV_PYTHON_VERSION: "3.8"
   POETRY_VERSION: "1.0.9"
   TWINE_VERSION: "3.1.1"
@@ -46,7 +47,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: ["3.6", "3.7", "3.8"]
+        python-version: ["3.7", "3.8"]
 
     runs-on: "ubuntu-latest"
 
@@ -67,7 +68,7 @@ jobs:
         run: |
           poetry config --local virtualenvs.create true
           poetry config --local virtualenvs.in-project true
-          poetry install --no-dev
+          poetry install
 
       - name: "Cache pre-commit"
         if: "matrix.python-version == env.DEV_PYTHON_VERSION"
@@ -80,6 +81,26 @@ jobs:
         if: "matrix.python-version == env.DEV_PYTHON_VERSION"
         uses: "pre-commit/action@v1.0.1"
 
+      - name: "Run tests"
+        run: |
+          set -e
+
+          # Coverage don't work well on Python 3.7
+          args=
+          if [ ${{ matrix.python-version }} == ${{ env.DEV_PYTHON_VERSION }} ]; then
+            args="--cov --no-cov-on-fail"
+          fi
+
+          poetry run python -m pytest ${args}
+
+      - name: "Send report to coveralls"
+        if: "matrix.python-version == env.DEV_PYTHON_VERSION"
+        env:
+          COVERALLS_REPO_TOKEN: "${{ secrets.COVERALLS_REPO_TOKEN }}"
+        run: |
+          python -m pip install coveralls==${{ env.COVERALLS_VERSION }}
+          python -m coveralls
+
   package:
     needs: "test"
     name: "Build & deploy package"

Makefile

@@ -2,6 +2,7 @@
 
 POETRY ?= poetry
 PRE_COMMIT ?= pre-commit
+PYTHON ?= $(POETRY) run python
 
 install: .install
 .install: pyproject.toml poetry.lock
@@ -15,4 +16,4 @@ lint-only:
 
 test: lint test-only
 test-only:
-	echo "All OK!"
+	$(PYTHON) -m pytest --cov --no-cov-on-fail

README.rst

@@ -26,6 +26,10 @@ pre-commit-run-hook-entry
     :target: https://github.com/playpauseandstop/pre-commit-run-hook-entry/blob/master/LICENSE
     :alt: BSD License
 
+.. image:: https://coveralls.io/repos/playpauseandstop/pre-commit-run-hook-entry/badge.svg?branch=master&service=github
+    :target: https://coveralls.io/github/playpauseandstop/pre-commit-run-hook-entry
+    :alt: Coverage
+
 Run `pre-commit`_ hook entry. Allow to run pre-commit hooks for text editor
 formatting / linting needs.
 
@@ -34,7 +38,7 @@ formatting / linting needs.
 Requirements
 ============
 
-- `Python <https://www.python.org/>`_ 3.6.1 or later
+- `Python <https://www.python.org/>`_ 3.7 or later
 - `pre-commit`_ 2.4.0 or later
 
 License