Antispam sieve script draft

crates/smtp/src/scripts/event_loop.rs

@@ -21,6 +21,7 @@
  * for more details.
 */
 
+use core::panic;
 use std::{sync::Arc, time::Duration};
 
 use ahash::AHashMap;
@@ -343,6 +344,31 @@ impl SMTP {
             }
         }
 
+        // Assert global variables
+        #[cfg(feature = "test_mode")]
+        if let Some(expected_variables) = params.expected_variables {
+            for var_name in instance.global_variable_names() {
+                if !expected_variables.contains_key(var_name) {
+                    panic!(
+                        "Unexpected variable {var_name:?} with value {:?}\nExpected {:?}\nFound: {:?}",
+                        instance.global_variable(var_name).unwrap(),
+                        expected_variables.keys().collect::<Vec<_>>(),
+                        instance.global_variable_names().collect::<Vec<_>>()
+                    );
+                }
+            }
+
+            for (name, expected) in &expected_variables {
+                if let Some(value) = instance.global_variable(name.as_str()) {
+                    assert_eq!(value, expected, "Variable {name:?} has unexpected value");
+                } else {
+                    panic!("Missing variable {name:?} with value {expected:?}\nExpected {:?}\nFound: {:?}", 
+                    expected_variables.keys().collect::<Vec<_>>(), 
+                    instance.global_variable_names().collect::<Vec<_>>());
+                }
+            }
+        }
+
         // Keep id
         // 0 = use original message
         // MAX = implicit keep