Add 'CONTAINS' filter type to FilterType enum and implement correspon…

…ding logic in apply_filter function. Enhance unit tests to validate behavior of the new filter type in FilterSchema.

elementary/monitor/data_monitoring/schema.py

@@ -31,20 +31,23 @@ class ResourceType(str, Enum):
 class FilterType(str, Enum):
     IS = "is"
     IS_NOT = "is_not"
+    CONTAINS = "contains"
 
 
 def apply_filter(filter_type: FilterType, value: Any, filter_value: Any) -> bool:
     if filter_type == FilterType.IS:
         return value == filter_value
     elif filter_type == FilterType.IS_NOT:
         return value != filter_value
+    elif filter_type == FilterType.CONTAINS:
+        return str(filter_value).lower() in str(value).lower()
     raise ValueError(f"Unsupported filter type: {filter_type}")
 
 
 ValueT = TypeVar("ValueT")
 
 
-ANY_OPERATORS = [FilterType.IS]
+ANY_OPERATORS = [FilterType.IS, FilterType.CONTAINS]
 ALL_OPERATORS = [FilterType.IS_NOT]
 
 

tests/unit/monitor/data_monitoring/test_filter_schema.py

@@ -44,3 +44,30 @@ def test_filter_schema_apply_filter_on_values_is_not_operator():
 def test_filter_schema_invalid_filter_type():
     with pytest.raises(ValueError):
         FilterSchema(values=["test1"], type="invalid")  # type: ignore[arg-type]
+
+
+def test_filter_schema_contains_operator():
+    filter_schema = FilterSchema(values=["test"], type=FilterType.CONTAINS)
+
+    # Should match when value contains the filter value
+    assert filter_schema.apply_filter_on_value("test123") is True
+    assert filter_schema.apply_filter_on_value("123test") is True
+    assert filter_schema.apply_filter_on_value("123test456") is True
+
+    # Should match case-insensitive
+    assert filter_schema.apply_filter_on_value("TEST123") is True
+    assert filter_schema.apply_filter_on_value("123TEST") is True
+
+    # Should not match when value doesn't contain filter value
+    assert filter_schema.apply_filter_on_value("123") is False
+
+
+def test_filter_schema_apply_filter_on_values_contains_operator():
+    filter_schema = FilterSchema(values=["test1", "test2"], type=FilterType.CONTAINS)
+
+    # Should match when any value contains any filter value
+    assert filter_schema.apply_filter_on_values(["abc_test1_def", "xyz"]) is True
+    assert filter_schema.apply_filter_on_values(["abc", "xyz_test2"]) is True
+
+    # Should not match when no values contain any filter values
+    assert filter_schema.apply_filter_on_values(["abc", "xyz"]) is False