Add tests/test_utils_lazypv.py

tests/test_utils_lazypv.py

@@ -0,0 +1,78 @@
+import pytest
+import sys
+import os
+sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))
+from slic.utils.lazypv import *
+
+
+import pytest
+import sys
+import os
+sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))
+from slic.utils.lazypv import PV
+
+
+def test_getattr():
+    # Only valid kwargs accepted by epics.PV
+    pv = PV(
+        "ca://TEST:FLOAT",
+        form='time',
+        auto_monitor=True,
+        verbose=True,
+        connection_timeout=3.0
+    )
+
+    # Pv not yet instantiated
+    assert pv._pv is None
+
+    # Trigger instantiation by accessing a real attribute
+    pvname = pv.__getattr__('pvname')
+    assert isinstance(pvname, str)
+    assert pvname == "ca://TEST:FLOAT"
+    assert pv._pv is not None
+
+    # access all known epics.PV kwargs via __getattr__
+    form = pv.__getattr__('form')
+    assert form == 'time'
+
+    auto_monitor = pv.__getattr__('auto_monitor')
+    assert auto_monitor is True
+
+    verbose = pv.__getattr__('verbose')
+    assert verbose is True
+
+    timeout = pv.__getattr__('connection_timeout')
+    assert isinstance(timeout, (float, int))
+    assert timeout == 3.0
+
+    # Have the get() method from (__getattr__) to get all the parameters in a dict 
+    get_method = pv.__getattr__('get')
+    assert callable(get_method) # Check if it's really a function
+
+    result = get_method()
+    assert isinstance(result, dict), "Expected dict because form='time'"
+
+    # Full check of expected fields
+    assert 'value' in result
+    assert 'timestamp' in result
+    assert 'status' in result
+    assert 'severity' in result
+
+    value = result['value']
+    timestamp = result['timestamp']
+    status = result['status']
+    severity = result['severity']
+
+    assert isinstance(value, (int, float)), "Value should be numeric"
+    assert isinstance(timestamp, (int, float)), "Timestamp should be numeric"
+    assert isinstance(status, int), "Status should be int"
+    assert isinstance(severity, int), "Severity should be int"
+
+    # Confirm PV not re-instantiated on second getattr
+    second_get = pv.__getattr__('get')
+    assert get_method is second_get
+
+    # Remove the instantiated PV
+    del pv._pv
+    pv._pv = None
+    assert pv._pv is None