Update tests/test_utils_pv.py

tests/test_utils_pv.py

@@ -5,41 +5,39 @@ from slic.utils.pv import PV
 
 @pytest.fixture
 def fake_epics_pv(monkeypatch):
-
+    """Fixture with proper initialization and value control"""
     class FakeEPICS:
         def __init__(self, pvname):
             self.pvname = pvname
-            self.value = 0.0  
+            self._value = None
             self.units = "units"
             self._callbacks = {}
         
         def get(self):
-            return self.value
+            return self._value
             
         def put(self, value, **kwargs):
-            old = self.value
-            self.value = value
+            old = self._value
+            self._value = value
             for cb in self._callbacks.values():
                 cb(value, old=old, **kwargs)
-                
-        def add_callback(self, callback):
-            cb_id = id(callback)
-            self._callbacks[cb_id] = callback
-            return cb_id
-            
-        def remove_callback(self, cb_id):
-            self._callbacks.pop(cb_id, None)
-    
-    # Store the created fake PVs to access them later
-    fake_pvs = {}
-    
-    def create_fake_pv(pvname, **kwargs):
-        fake_pvs[pvname] = FakeEPICS(pvname)
-        return fake_pvs[pvname]
-    
-    monkeypatch.setattr('epics.PV', create_fake_pv)
+        
+        # Add setter for testing
+        def set_value(self, value):
+            self._value = value
+
+    # Store instances for access
+    instances = {}
+
+    def create_pv(pvname, **kwargs):
+        instances[pvname] = FakeEPICS(pvname)
+        return instances[pvname]
+
+    monkeypatch.setattr('epics.PV', create_pv)
     
+    # Create and initialize
     pv = PV("TEST:PV")
+    instances["TEST:PV"]._value = 0.0  
     return pv
 
 @pytest.fixture