add backend tests

.github/workflows/test-backend.yml

@@ -0,0 +1,28 @@
+name: Python package
+
+on: [push, pull_request]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [3.7]
+    defaults:
+      run:
+        working-directory: ./backend
+    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 pytest
+          if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+      - name: Test with pytest
+        run: |
+          pytest

backend/requirements.txt

@@ -5,3 +5,4 @@ greenlet==1.1.0
 python-engineio==3.14.2
 python-socketio==4.6.1
 six==1.16.0
+pytest==6.2.4

backend/tests/deck_test.py

@@ -0,0 +1,37 @@
+from dummy_socket import DummySocket
+from bang.deck import Deck
+from bang.game import Game
+
+def test_card_flip():
+    g = Game('test', DummySocket())
+    g.deck = Deck(g)
+    l = len(g.deck.cards)
+    assert g.deck.pick_and_scrap() != None
+    assert len(g.deck.cards) == l - 1
+    assert len(g.deck.scrap_pile) == 1
+
+def test_draw():
+    g = Game('test', DummySocket())
+    g.deck = Deck(g)
+    l = len(g.deck.cards)
+    assert g.deck.draw() != None
+    assert len(g.deck.cards) == l - 1
+    assert len(g.deck.scrap_pile) == 0
+
+def test_reshuffle():
+    g = Game('test', DummySocket())
+    g.deck = Deck(g)
+    l = len(g.deck.cards)
+    for i in range(80):
+        assert g.deck.pick_and_scrap() != None
+    assert len(g.deck.cards) == 79
+    assert len(g.deck.scrap_pile) == 1
+
+def test_draw_from_scrap():
+    g = Game('test', DummySocket())
+    g.deck = Deck(g)
+    l = len(g.deck.cards)
+    assert g.deck.pick_and_scrap() != None
+    assert g.deck.draw_from_scrap_pile() != None
+    assert len(g.deck.cards) == 79
+    assert len(g.deck.scrap_pile) == 0

backend/tests/dummy_socket.py

@@ -0,0 +1,4 @@
+
+class DummySocket():
+    def emit(self, event, data=None, to=None, room=None, skip_sid=None, namespace=None, callback=None, **kwargs):
+        return True