request the review classifier when a pr is opened or reopened

swarm-notify-router/src/flow.rs

@@ -435,6 +435,29 @@ mod tests {
         assert!(evaluate(&f, "pull_request_sync", &pull("assigned", "PR")).is_empty());
     }
 
+    /// The built-in classifier flow requests on a push, an open and a reopen,
+    /// and on no other action of a `pull_request` event.
+    #[test]
+    fn the_classifier_flow_requests_on_open_reopen_and_push_only() {
+        let f = swarm_wire::notify_flows::builtins()
+            .into_iter()
+            .find(|f| f.id == "head-classifier")
+            .expect("the built-in");
+        assert_eq!(f.validate(), Ok(()));
+        let pull = |action: &str| {
+            let mut fields = event(action, &[], &[], &[]);
+            fields.insert("kind", text("PR"));
+            fields
+        };
+        let got = |event_type: &str, action: &str| requests(&f, event_type, &pull(action)).len();
+        assert_eq!(got("pull_request", "opened"), 1);
+        assert_eq!(got("pull_request", "reopened"), 1);
+        assert_eq!(got("pull_request_sync", "synchronized"), 1);
+        assert_eq!(got("pull_request", "closed"), 0);
+        assert_eq!(got("pull_request", "edited"), 0);
+        assert_eq!(got("pull_request_assign", "opened"), 0);
+    }
+
     #[test]
     fn a_placeholder_expands_to_its_field_and_an_unknown_one_is_an_error() {
         let fields = event("assigned", &["a", "b"], &[], &[]);