test/attr_tests: fix tests with setattr

Since Python objects will dynamically add an attribute if one does not
exist when calling setattr(), we need to check that the attribute
actually exists before setting it. Otherwise, tests will pass even if
the attribute is not defined in the object being tested.

Signed-off-by: David Lechner <[email protected]>

test/attr_tests.py

@@ -83,6 +83,10 @@ def attribute_single_value_boolean(uri, classname, attr, value):
             Value to write and read back from attribute
     """
     bi = eval(classname + "(uri='" + uri + "')")
+
+    if not hasattr(bi, attr):
+        raise AttributeError(f"no attribute named: {attr}")
+
     setattr(bi, attr, value)
     rval = getattr(bi, attr)
     del bi
@@ -258,6 +262,10 @@ def attribute_write_only_str(uri, classname, attr, value):
             Value to write into attr property
     """
     sdr = eval(classname + "(uri='" + uri + "')")
+
+    if not hasattr(sdr, attr):
+        raise AttributeError(f"no attribute named: {attr}")
+
     try:
         setattr(sdr, attr, value)
         del sdr
@@ -284,6 +292,14 @@ def attribute_write_only_str_with_depends(uri, classname, attr, value, depends):
             are properties and values are values to be written
     """
     sdr = eval(classname + "(uri='" + uri + "')")
+
+    for p in depends:
+        if not hasattr(sdr, p):
+            raise AttributeError(f"no attribute named: {p}")
+
+    if not hasattr(sdr, attr):
+        raise AttributeError(f"no attribute named: {attr}")
+
     for p in depends:
         setattr(sdr, p, depends[p])
     try: