Addded start game button to snake, game no longer auto starts (fixes …

src/freegames/snake.py

@@ -16,14 +16,50 @@
 food = vector(0, 0)
 snake = [vector(10, 0)]
 aim = vector(0, -10)
+started = False
 
 
 def change(x, y):
     """Change snake direction."""
+    if not started:
+        return
+
     aim.x = x
     aim.y = y
 
 
+def start_game(x, y):
+    """Start the game when the start button is clicked."""
+    global started
+
+    if started or not (-80 <= x <= 80 and -25 <= y <= 25):
+        return
+
+    started = True
+    onscreenclick(None)
+    clear()
+    move()
+
+
+def draw_start_button():
+    """Draw the start button."""
+    up()
+    goto(-80, -25)
+    color('black', 'light gray')
+    down()
+    begin_fill()
+    for _ in range(2):
+        forward(160)
+        left(90)
+        forward(50)
+        left(90)
+    end_fill()
+    up()
+    goto(0, -18)
+    color('black')
+    write('Start Game', align='center', font=('Arial', 16, 'bold'))
+
+
 def inside(head):
     """Return True if head inside boundaries."""
     return -200 < head.x < 190 and -200 < head.y < 190
@@ -66,5 +102,6 @@ def move():
 onkey(lambda: change(-10, 0), 'Left')
 onkey(lambda: change(0, 10), 'Up')
 onkey(lambda: change(0, -10), 'Down')
-move()
+draw_start_button()
+onscreenclick(start_game)
 done()

tests/test_snake.py

@@ -10,7 +10,9 @@
 def test_snake():
     random.seed(0)
     mockturtle.events.clear()
+    mockturtle.state.clear()
     mockturtle.events += [
+        ('click', 0, 0),
         ('timer',),
         ('key Left',),
         ('timer',),
@@ -26,3 +28,18 @@ def test_snake():
     ]
     mockturtle.events += [('timer', True)] * 300
     runpy.run_module('freegames.snake')
+
+
+def test_snake_waits_for_start_click():
+    mockturtle.state.clear()
+    mockturtle.events[:] = [('timer', True)]
+    runpy.run_module('freegames.snake')
+    assert 'timer' not in mockturtle.state
+
+    mockturtle.state.clear()
+    mockturtle.events[:] = [
+        ('click', 0, 0),
+        ('timer', True),
+    ]
+    runpy.run_module('freegames.snake')
+    assert 'timer' in mockturtle.state