Make tests fail when the code they test does nothing

tests/test_apps.py

@@ -1,6 +1,7 @@
 """Asynchronous Python client for LaMetric TIME devices."""
 
 from aioresponses import aioresponses
+from yarl import URL
 
 from demetriek import Chart, Goal, GoalData, LaMetricDevice, Simple
 
@@ -9,25 +10,23 @@
 
 async def test_app_next(responses: aioresponses, device: LaMetricDevice) -> None:
     """Test switching to the next app."""
-    responses.put(
-        f"{DEVICE_URL}/api/v2/device/apps/next",
-        status=200,
-        body=load_fixture("apps_next.json"),
-    )
+    url = f"{DEVICE_URL}/api/v2/device/apps/next"
+    responses.put(url, status=200, body=load_fixture("apps_next.json"))
 
     await device.app_next()
 
+    assert ("PUT", URL(url)) in responses.requests
+
 
 async def test_app_previous(responses: aioresponses, device: LaMetricDevice) -> None:
     """Test switching to the previous app."""
-    responses.put(
-        f"{DEVICE_URL}/api/v2/device/apps/prev",
-        status=200,
-        body=load_fixture("apps_prev.json"),
-    )
+    url = f"{DEVICE_URL}/api/v2/device/apps/prev"
+    responses.put(url, status=200, body=load_fixture("apps_prev.json"))
 
     await device.app_previous()
 
+    assert ("PUT", URL(url)) in responses.requests
+
 
 async def test_apps(responses: aioresponses, device: LaMetricDevice) -> None:
     """Test getting the installed apps."""
@@ -88,18 +87,19 @@ async def test_app(responses: aioresponses, device: LaMetricDevice) -> None:
 
 async def test_activate_widget(responses: aioresponses, device: LaMetricDevice) -> None:
     """Test showing a specific widget."""
-    responses.put(
+    url = (
         f"{DEVICE_URL}/api/v2/device/apps/com.lametric.clock"
-        "/widgets/1_com.lametric.clock/activate",
-        status=200,
-        body=load_fixture("app_action.json"),
+        "/widgets/1_com.lametric.clock/activate"
     )
+    responses.put(url, status=200, body=load_fixture("app_action.json"))
 
     await device.activate_widget(
         package="com.lametric.clock",
         widget_id="1_com.lametric.clock",
     )
 
+    assert ("PUT", URL(url)) in responses.requests
+
 
 async def test_app_action(responses: aioresponses, device: LaMetricDevice) -> None:
     """Test running an app action with parameters."""

tests/test_audio.py

@@ -40,3 +40,12 @@ async def test_set_audio(responses: aioresponses, device: LaMetricDevice) -> Non
     assert audio.volume_limit
     assert audio.volume_limit.range_min == 0
     assert audio.volume_limit.range_max == 100
+
+
+async def test_set_audio_mute(responses: aioresponses, device: LaMetricDevice) -> None:
+    """Test a volume of zero is sent, and not mistaken for no volume at all."""
+    responses.put(AUDIO_URL, status=200, body=load_fixture("audio_set.json"))
+
+    await device.audio(volume=0)
+
+    assert request_json(responses, "PUT", AUDIO_URL) == {"volume": 0}

tests/test_display.py

@@ -75,6 +75,21 @@ async def test_set_display(responses: aioresponses, device: LaMetricDevice) -> N
     assert display.on is True
 
 
+async def test_set_display_zero_and_off(
+    responses: aioresponses, device: LaMetricDevice
+) -> None:
+    """Test zero and off are sent, and not mistaken for no value at all."""
+    responses.put(DISPLAY_URL, status=200, body=load_fixture("display_set.json"))
+
+    await device.display(brightness=0, screensaver_enabled=False, on=False)
+
+    assert request_json(responses, "PUT", DISPLAY_URL) == {
+        "brightness": 0,
+        "screensaver": {"enabled": False},
+        "on": False,
+    }
+
+
 async def test_set_display_screensaver_mode(
     responses: aioresponses, device: LaMetricDevice
 ) -> None: