[test] Add integration test for light effect memory corruption fix (#10417)

tests/integration/fixtures/light_calls.yaml

@@ -56,10 +56,29 @@ light:
     warm_white_color_temperature: 2000 K
     constant_brightness: true
     effects:
+      # Use default parameters:
       - random:
-          name: "Random Effect"
+      # Customize parameters - use longer names to potentially trigger buffer issues
+      - random:
+          name: "My Very Slow Random Effect With Long Name"
+          transition_length: 30ms
+          update_interval: 30ms
+      - random:
+          name: "My Fast Random Effect That Changes Quickly"
+          transition_length: 4ms
+          update_interval: 5ms
+      - random:
+          name: "Random Effect With Medium Length Name Here"
           transition_length: 100ms
           update_interval: 200ms
+      - random:
+          name: "Another Random Effect With Different Parameters"
+          transition_length: 2ms
+          update_interval: 3ms
+      - random:
+          name: "Yet Another Random Effect To Test Memory"
+          transition_length: 15ms
+          update_interval: 20ms
       - strobe:
           name: "Strobe Effect"
       - pulse:
@@ -73,6 +92,17 @@ light:
     red: test_red
     green: test_green
     blue: test_blue
+    effects:
+      # Same random effects to test for cross-contamination
+      - random:
+      - random:
+          name: "RGB Slow Random"
+          transition_length: 20ms
+          update_interval: 25ms
+      - random:
+          name: "RGB Fast Random"
+          transition_length: 2ms
+          update_interval: 3ms
 
   - platform: binary
     name: "Test Binary Light"

tests/integration/test_light_calls.py

@@ -108,14 +108,51 @@ async def test_light_calls(
         # Wait for flash to end
         state = await wait_for_state_change(rgbcw_light.key)
 
-        # Test 13: effect only
+        # Test 13: effect only - test all random effects
         # First ensure light is on
         client.light_command(key=rgbcw_light.key, state=True)
         state = await wait_for_state_change(rgbcw_light.key)
-        # Now set effect
+
-        client.light_command(key=rgbcw_light.key, effect="Random Effect")
+        # Test 13a: Default random effect (no name, gets default name "Random")
+        client.light_command(key=rgbcw_light.key, effect="Random")
         state = await wait_for_state_change(rgbcw_light.key)
-        assert state.effect == "Random Effect"
+        assert state.effect == "Random"
+
+        # Test 13b: Slow random effect with long name
+        client.light_command(
+            key=rgbcw_light.key, effect="My Very Slow Random Effect With Long Name"
+        )
+        state = await wait_for_state_change(rgbcw_light.key)
+        assert state.effect == "My Very Slow Random Effect With Long Name"
+
+        # Test 13c: Fast random effect with long name
+        client.light_command(
+            key=rgbcw_light.key, effect="My Fast Random Effect That Changes Quickly"
+        )
+        state = await wait_for_state_change(rgbcw_light.key)
+        assert state.effect == "My Fast Random Effect That Changes Quickly"
+
+        # Test 13d: Random effect with medium length name
+        client.light_command(
+            key=rgbcw_light.key, effect="Random Effect With Medium Length Name Here"
+        )
+        state = await wait_for_state_change(rgbcw_light.key)
+        assert state.effect == "Random Effect With Medium Length Name Here"
+
+        # Test 13e: Another random effect
+        client.light_command(
+            key=rgbcw_light.key,
+            effect="Another Random Effect With Different Parameters",
+        )
+        state = await wait_for_state_change(rgbcw_light.key)
+        assert state.effect == "Another Random Effect With Different Parameters"
+
+        # Test 13f: Yet another random effect
+        client.light_command(
+            key=rgbcw_light.key, effect="Yet Another Random Effect To Test Memory"
+        )
+        state = await wait_for_state_change(rgbcw_light.key)
+        assert state.effect == "Yet Another Random Effect To Test Memory"
 
         # Test 14: stop effect
         client.light_command(key=rgbcw_light.key, effect="None")