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-rw-r--r--tests/Properties.hs4
1 files changed, 4 insertions, 0 deletions
diff --git a/tests/Properties.hs b/tests/Properties.hs
index b93c3a6..34b6388 100644
--- a/tests/Properties.hs
+++ b/tests/Properties.hs
@@ -392,6 +392,9 @@ prop_delete_local (x :: T) =
Nothing -> True
Just i -> hidden_spaces x == hidden_spaces (delete i x)
+-- delete should not affect focus unless the focused element is what is being deleted
+prop_delete_focus n (x :: T) = member n x && Just n /= peek x ==> peek (delete n x) == peek x
+
-- ---------------------------------------------------------------------
-- swapLeft, swapRight, swapMaster: reordiring windows
@@ -537,6 +540,7 @@ main = do
,("delete/member" , mytest prop_delete)
,("delete is reversible", mytest prop_delete_insert)
,("delete is local" , mytest prop_delete_local)
+ ,("delete/focus" , mytest prop_delete_focus)
,("swapMaster: invariant", mytest prop_swap_master_I)
,("swapLeft: invariant" , mytest prop_swap_left_I)