Add some tests for this feature

Author: imbstack

src/sources/kubernetes_logs/mod.rs

@@ -1177,6 +1177,59 @@ mod tests {
         crate::test_util::test_generate_config::<Config>();
     }
 
+    #[test]
+    fn test_default_config_add_namespace_fields() {
+        let config = Config::default();
+        assert_eq!(config.add_namespace_fields, true);
+    }
+
+    #[test]
+    fn test_config_add_namespace_fields_disabled() {
+        let config = Config {
+            add_namespace_fields: false,
+            ..Default::default()
+        };
+        assert_eq!(config.add_namespace_fields, false);
+    }
+
+    #[test]
+    fn test_config_serialization_add_namespace_fields() {
+        // Test that the flag serializes/deserializes correctly from TOML
+        let toml_config = r#"
+            add_namespace_fields = false
+        "#;
+        let config: Config = toml::from_str(toml_config).unwrap();
+        assert_eq!(config.add_namespace_fields, false);
+        
+        let default_toml = "";
+        let default_config: Config = toml::from_str(default_toml).unwrap();
+        assert_eq!(default_config.add_namespace_fields, true);
+    }
+
+    #[test]
+    fn test_add_namespace_fields_affects_behavior() {
+        // Test that the config field properly controls namespace watching behavior
+        // This is a unit test for the conditional logic in the run method
+        let enabled_config = Config {
+            add_namespace_fields: true,
+            ..Default::default()
+        };
+        let disabled_config = Config {
+            add_namespace_fields: false,
+            ..Default::default()
+        };
+        
+        // The main validation is that the flag is passed through correctly
+        // and can be used in conditional logic
+        assert!(should_watch_namespaces(&enabled_config));
+        assert!(!should_watch_namespaces(&disabled_config));
+    }
+    
+    // Helper function to simulate the conditional logic from the run method
+    fn should_watch_namespaces(config: &Config) -> bool {
+        config.add_namespace_fields
+    }
+
     #[test]
     fn prepare_exclude_paths() {
         let cases = vec![