test the deployed-rev check and the update-chip comparison. Refs #5913

hive-c0re/src/workers/auto_update.rs

@@ -52,7 +52,13 @@ pub fn current_flake_rev(hyperhive_flake: &str) -> Option<String> {
 #[must_use]
 pub fn agent_config_pending(name: &str, deployed: Option<&str>) -> bool {
     let pinned = crate::meta_rev::recorded(name).and_then(|build| build.config);
-    match (pinned.as_deref(), deployed) {
+    config_pending(pinned.as_deref(), deployed)
+}
+
+/// The comparison behind [`agent_config_pending`]: pending only when both
+/// commits are known and differ.
+fn config_pending(pinned: Option<&str>, deployed: Option<&str>) -> bool {
+    match (pinned, deployed) {
         (Some(pinned), Some(deployed)) => pinned != deployed.trim(),
         _ => false,
     }
@@ -284,7 +290,7 @@ fn submit_boot_tree(
 
 #[cfg(test)]
 mod tests {
-    use super::{BootAction, boot_action};
+    use super::{BootAction, boot_action, config_pending};
     use crate::power::Wanted;
 
     // The regression the `Unreadable` variant exists for: the arm used to
@@ -350,4 +356,15 @@ mod tests {
             BootAction::Defer { reconcile: true }
         );
     }
+
+    #[test]
+    fn config_is_pending_only_when_the_pins_differ() {
+        assert!(config_pending(Some("bbb"), Some("aaa")));
+        assert!(
+            !config_pending(Some("aaa"), Some("aaa\n")),
+            "marker newline"
+        );
+        assert!(!config_pending(None, Some("aaa")), "archetype agent");
+        assert!(!config_pending(Some("aaa"), None), "never built");
+    }
 }