simtest: cut coordinator before its commit

1 files changed, 11 insertions, 0 deletions

diff --git a/src/simtest/remakes.rs b/src/simtest/remakes.rs
index b1a6b12..4a193aa 100644
--- a/src/simtest/remakes.rs
+++ b/src/simtest/remakes.rs
@@ -352,6 +352,16 @@ async fn coordinator_cut_off_after_committing_rejoins_the_others() {
             ..LinkParams::default()
         }
     };
+    // Their votes take half a second to reach a, so a commits after the cut below: on
+    // fast links a commits as soon as b's vote is in, and its decision could reach b and c
+    // before this test sees that they have the proposal.
+    let slow = LinkParams {
+        delay: (Duration::from_millis(500), Duration::from_millis(500)),
+        ..LinkParams::default()
+    };
+    for other in ["b", "c"] {
+        sim.net.set_link(other, "a", slow.clone());
+    }
     let lost = propose(&a, json!({ "kind": "compact" })).await;
     let (a_ref, b_ref, c_ref, lost_ref) = (&a, &b, &c, lost.as_str());
     sim.wait_until("b and c have the proposal", SOON, move || async move {
@@ -385,6 +395,7 @@ async fn coordinator_cut_off_after_committing_rejoins_the_others() {
 
     for other in ["b", "c"] {
         sim.net.set_link("a", other, LinkParams::default());
+        sim.net.set_link(other, "a", LinkParams::default());
     }
     sim.net.bring_up("a");
     sim.wait_until("a is on b's and c's epoch", REMAKE, move || async move {