1 files changed, 44 insertions, 0 deletions
diff --git a/tests/run.lua b/tests/run.lua
index eac53bf..7431de5 100644
--- a/tests/run.lua
+++ b/tests/run.lua
@@ -2839,6 +2839,50 @@ test("Partial outcomes retain the last intermediate destination", function()
   same(2, till_partial.successful_steps)
 end)
 
+test("Boundary-before-any outcomes preserve the original position", function()
+  local engine = destination_engine.new()
+  local view = text_topology.new({ "", "abc" }, "utf-8")
+  local origin = domain.Position.new(1, 1)
+  local missing = motion_plan.build(
+    target_plan.build(target("z"), matching_policy()),
+    "f",
+    "buffer"
+  )
+  local missing_outcome = engine:calculate(view, origin, missing, 4, true)
+  same(domain.SearchStatus.BOUNDARY_BEFORE_ANY, missing_outcome.status)
+  same(origin, missing_outcome.endpoint)
+  same(0, missing_outcome.successful_steps)
+
+  local adjacent_view = text_topology.new({ "ab" }, "utf-8")
+  local adjacent_origin = domain.Position.new(1, 1)
+  local repeated_till = motion_plan.build(
+    target_plan.build(target("b"), matching_policy()),
+    "t"
+  )
+  local adjacent_outcome = engine:calculate(
+    adjacent_view,
+    adjacent_origin,
+    repeated_till,
+    1,
+    false
+  )
+  same(domain.SearchStatus.BOUNDARY_BEFORE_ANY, adjacent_outcome.status)
+  same(adjacent_origin, adjacent_outcome.endpoint)
+  same(0, adjacent_outcome.successful_steps)
+
+  local all_empty = text_topology.new({ "", "" }, "utf-8")
+  local empty_origin = domain.Position.new(2, 1)
+  local empty_outcome = engine:calculate(
+    all_empty,
+    empty_origin,
+    missing,
+    1,
+    true
+  )
+  same(domain.SearchStatus.BOUNDARY_BEFORE_ANY, empty_outcome.status)
+  same(empty_origin, empty_outcome.endpoint)
+end)
+
 for _, item in ipairs(tests) do
   local ok, failure = xpcall(item.body, debug.traceback)
   if not ok then