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Diffstat (limited to 'helix-term/tests/test/splits.rs')
| -rw-r--r-- | helix-term/tests/test/splits.rs | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/helix-term/tests/test/splits.rs b/helix-term/tests/test/splits.rs index a34a24b7..96ced21a 100644 --- a/helix-term/tests/test/splits.rs +++ b/helix-term/tests/test/splits.rs @@ -161,5 +161,30 @@ async fn test_changes_in_splits_apply_to_all_views() -> anyhow::Result<()> { )) .await?; + // See <https://github.com/helix-editor/helix/issues/4957>. + // This sequence undoes part of the history and then adds new changes, creating a + // new branch in the history tree. `View::sync_changes` applies transactions down + // and up to the lowest common ancestor in the path between old and new revision + // numbers. If we apply these up/down transactions in the wrong order, this case + // panics. + // The key sequence: + // * 3[<space> Create three empty lines so we are at the end of the document. + // * <C-w>v<C-s> Create a split and save that point at the end of the document + // in the jumplist. + // * <C-w>w Switch back to the first window. + // * uu Undo twice (not three times which would bring us back to the + // root of the tree). + // * 3[<space> Create three empty lines. Now the end of the document is past + // where it was on step 1. + // * <C-w>q Close window 1, focusing window 2 and causing a sync. This step + // panics if we don't apply in the right order. + // * %d Clean up the buffer. + test(( + "#[|]#", + "3[<space><C-w>v<C-s><C-w>wuu3[<space><C-w>q%d", + "#[|]#", + )) + .await?; + Ok(()) } |