Python: Add Continuous Integration for Python

There are a lot of exceptions, but it's a start.
This will ensure that no more issues get added / that issues
get fixed before the code is added

.github/workflows/check-python.yml

@@ -0,0 +1,35 @@
+name: Check Python code
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.10"]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -r 00_Utilities/python/ci-requirements.txt
+    - name: Test with pytest
+      run: |
+        pytest 01_Acey_Ducey/python 02_Amazing/python
+    - name: Test with mypy
+      run: |
+        mypy . --exclude 79_Slalom --exclude 27_Civil_War --exclude 38_Fur_Trader --exclude 81_Splat --exclude 09_Battle --exclude 40_Gomoko --exclude 36_Flip_Flop --exclude 43_Hammurabi --exclude 04_Awari --exclude 78_Sine_Wave --exclude 77_Salvo --exclude 34_Digits --exclude 17_Bullfight --exclude 16_Bug
+    - name: Test with flake8
+      run: |
+        flake8 . --ignore E501,W504,W503,E741,F541,E203,W291,E722,E711,E712,F821,F401,E402,F841,E302,E731,E266

.gitignore

@@ -28,6 +28,7 @@ out/
 *.py[co]
 .python-version
 Pipfile
+venv/
 
 .DS_Store
 .vs/

00_Utilities/python/ci-requirements.in

@@ -0,0 +1,3 @@
+pytest
+flake8
+mypy

00_Utilities/python/ci-requirements.txt

@@ -0,0 +1,38 @@
+#
+# This file is autogenerated by pip-compile with python 3.10
+# To update, run:
+#
+#    pip-compile ci-requirements.in
+#
+attrs==21.4.0
+    # via pytest
+flake8==4.0.1
+    # via -r ci-requirements.in
+iniconfig==1.1.1
+    # via pytest
+mccabe==0.6.1
+    # via flake8
+mypy==0.931
+    # via -r ci-requirements.in
+mypy-extensions==0.4.3
+    # via mypy
+packaging==21.3
+    # via pytest
+pluggy==1.0.0
+    # via pytest
+py==1.11.0
+    # via pytest
+pycodestyle==2.8.0
+    # via flake8
+pyflakes==2.4.0
+    # via flake8
+pyparsing==3.0.7
+    # via packaging
+pytest==7.0.1
+    # via -r ci-requirements.in
+tomli==2.0.1
+    # via
+    #   mypy
+    #   pytest
+typing-extensions==4.1.1
+    # via mypy

02_Amazing/python/amazing.py

@@ -40,6 +40,7 @@ def build_maze(width: int, length: int) -> Maze:
     #   Set to 1 if there is an exit down
     #   Set to 2 if there is an exit right
     #   Set to 3 if there are exits down and right
+    assert width >= 2 and length >= 2
 
     used = []
     walls = []

02_Amazing/python/test_amazing.py

@@ -0,0 +1,27 @@
+import pytest
+from amazing import build_maze, welcome_header
+
+
+def test_welcome_header(capsys):
+    assert welcome_header() == None
+    out, err = capsys.readouterr()
+    assert out == (
+        "                            AMAZING PROGRAM\n"
+        "               CREATIVE COMPUTING  MORRISTOWN, NEW JERSEY\n\n\n\n"
+    )
+    assert err == ""
+
+
+@pytest.mark.parametrize(
+    ("width", "length"),
+    [
+        (1, 1),
+        (1, 0),
+        (1, -1),
+        (1, 2),
+        (2, 1),
+    ],
+)
+def test_build_maze(width, length):
+    with pytest.raises(AssertionError):
+        build_maze(width, length)