fix: TurboBlaze fryer preheat state after set_mode and on pullOut

src/pyvesync/devices/vesynckitchen.py

@@ -500,14 +500,21 @@ async def get_details(self) -> None:
         if _current_temp is not None and self.temp_unit == TemperatureUnits.FAHRENHEIT:
             _current_temp = round(_current_temp * 9 / 5 + 32)
 
+        # The API reports preheatSetTime as 0 when the program has no preheat.
+        # Pass None in that case so the state does not read as a preheat.
+        _preheat_set_time = resp_model.preheatSetTime or None
+        _preheat_last_time = (
+            resp_model.preheatLastTime if _preheat_set_time is not None else None
+        )
+
         self.state_chamber_1.set_state(
             cook_status=self.status_map[resp_model.cookStatus],
             cook_time=cook_step.cookSetTime,
             cook_last_time=cook_step.cookLastTime,
             cook_temp=cook_step.cookTemp,
             cook_mode=cook_step.mode,
-            preheat_set_time=resp_model.preheatSetTime,
-            preheat_last_time=resp_model.preheatLastTime,
+            preheat_set_time=_preheat_set_time,
+            preheat_last_time=_preheat_last_time,
             current_temp=_current_temp,
         )
 
@@ -533,7 +540,10 @@ async def set_mode_from_recipe(self, recipe: AirFryerPresetRecipe) -> bool:
             self.state.set_standby()
             return False
         self.state.set_state(
-            cook_status=AirFryerCookStatus.COOKING,
+            # A program with preheat starts in the preheat phase.
+            cook_status=AirFryerCookStatus.HEATING
+            if recipe.preheat_time
+            else AirFryerCookStatus.COOKING,
             cook_time=recipe.cook_time,
             cook_last_time=recipe.cook_time,
             cook_temp=recipe.target_temp,

src/tests/test_fryer_turboblaze_state.py

@@ -0,0 +1,78 @@
+"""State tests for bypassV2 (TurboBlaze class) fryers around preheat.
+
+Covers the local state after starting a program with preheat, and how a
+pulled-out basket is classified when the API reports ``preheatSetTime`` as 0.
+"""
+
+from copy import deepcopy
+
+import call_json_fryers
+from base_test_cases import TestBase
+from defaults import build_bypass_v2_response
+
+from pyvesync.const import AirFryerCookStatus
+
+MODEL = 'CAF-DC601S'
+
+
+class TestTurboBlazePreheatState(TestBase):
+    """Preheat state handling for VeSyncTurboBlazeFryer."""
+
+    def _update_with(self, fryer, **overrides):
+        details = deepcopy(call_json_fryers.AIR_FRYER_COOKING_DETAILS[MODEL])
+        details.update(overrides)
+        self.mock_api.return_value = (
+            build_bypass_v2_response(inner_result=details),
+            200,
+        )
+        self.run_in_loop(fryer.update)
+
+    def test_set_mode_with_preheat_starts_in_heating(self):
+        fryer = self.get_device('air_fryers', MODEL)
+        self.mock_api.return_value = (build_bypass_v2_response(inner_result={}), 200)
+
+        result = self.run_in_loop(
+            fryer.set_mode, cook_time=600, cook_temp=350, preheat_time=300
+        )
+
+        assert result is True
+        assert fryer.state.cook_status == AirFryerCookStatus.HEATING
+        assert fryer.state.is_in_preheat_mode is True
+        assert fryer.state.preheat_set_time == 300
+        assert fryer.state.cook_set_time == 600
+        assert fryer.state.cook_set_temp == 350
+
+    def test_set_mode_without_preheat_starts_in_cooking(self):
+        fryer = self.get_device('air_fryers', MODEL)
+        self.mock_api.return_value = (build_bypass_v2_response(inner_result={}), 200)
+
+        result = self.run_in_loop(fryer.set_mode, cook_time=600, cook_temp=350)
+
+        assert result is True
+        assert fryer.state.cook_status == AirFryerCookStatus.COOKING
+        assert fryer.state.is_in_preheat_mode is False
+        assert fryer.state.preheat_set_time is None
+
+    def test_pull_out_during_cook_is_cook_mode(self):
+        """preheatSetTime 0 from the API means the program has no preheat."""
+        fryer = self.get_device('air_fryers', MODEL)
+        self._update_with(
+            fryer, cookStatus='pullOut', preheatSetTime=0, preheatLastTime=0
+        )
+
+        assert fryer.state.cook_status == AirFryerCookStatus.PULL_OUT
+        assert fryer.state.preheat_set_time is None
+        assert fryer.state.is_in_preheat_mode is False
+        assert fryer.state.is_in_cook_mode is True
+
+    def test_pull_out_during_preheat_is_preheat_mode(self):
+        fryer = self.get_device('air_fryers', MODEL)
+        self._update_with(
+            fryer, cookStatus='pullOut', preheatSetTime=300, preheatLastTime=120
+        )
+
+        assert fryer.state.cook_status == AirFryerCookStatus.PULL_OUT
+        assert fryer.state.preheat_set_time == 300
+        assert fryer.state.preheat_last_time == 120
+        assert fryer.state.is_in_preheat_mode is True
+        assert fryer.state.is_in_cook_mode is False