change liquid cooling UT as hw-mgmt require the reading of counter

Signed-off-by: Yuanzhe, Liu <[email protected]>

Author: yuazhe

platform/mellanox/mlnx-platform-api/tests/test_liquid_cooling.py

@@ -2,6 +2,7 @@
 import sys
 from unittest import mock
 from sonic_platform.liquid_cooling import LiquidCooling, LeakageSensor
+from sonic_platform.utils import read_int_from_file
 
 def test_leakage_sensor_init():
     sensor = LeakageSensor("leakage1", "/test/path")
@@ -31,7 +32,8 @@ def test_leakage_sensor_is_leak():
 def test_liquid_cooling_init():
     with mock.patch('os.path.exists') as mock_exists, \
          mock.patch('os.path.join', side_effect=lambda *args: "/".join(args)) as mock_join, \
-         mock.patch('glob.glob') as mock_glob:
+         mock.patch('glob.glob') as mock_glob, \
+         mock.patch('sonic_platform.utils.read_int_from_file', return_value=4) as mock_read_int:
 
         # Setup mock to simulate 4 leakage sensors
         mock_exists.side_effect = [True, True, True, True]
@@ -45,7 +47,7 @@ def test_liquid_cooling_init():
         liquid_cooling = LiquidCooling()
 
         # Verify the number of sensors initialized
-        assert liquid_cooling.leakage_sensors_num == 4
+        assert liquid_cooling.get_leak_sensor_num() == 4
 
 
         with mock.patch.object(liquid_cooling.leakage_sensors[3], 'is_leak', return_value=False) as mock_sensor1: