Enumerate matching target starts

1 files changed, 37 insertions, 0 deletions

diff --git a/tests/run.lua b/tests/run.lua
index f684d65..e84c12a 100644
--- a/tests/run.lua
+++ b/tests/run.lua
@@ -2201,6 +2201,43 @@ test("DestinationEngine accepts pure calculation inputs", function()
   end, "valid cursor")
 end)
 
+test("DestinationEngine enumerates target starts in motion order", function()
+  local view = text_topology.new({ "abaca" }, "utf-8")
+  local origin = domain.Position.new(1, 3)
+  local visits = {}
+  local target_match = domain.TargetPlan.new({
+    target = target("a"),
+    kind = domain.TargetPlanKind.LITERAL,
+    case_mode = domain.CaseMode.SENSITIVE,
+    matcher = function(character, position)
+      visits[#visits + 1] = character .. ":" .. tostring(position)
+      return character == "a"
+    end,
+  })
+  local engine = destination_engine.new()
+
+  local forward = engine:calculate(
+    view,
+    origin,
+    motion_plan.build(target_match, "f"),
+    1,
+    true
+  )
+  same(domain.Position.new(1, 5), forward.endpoint)
+  list_same({ "c:(1,4)", "a:(1,5)" }, visits)
+
+  visits = {}
+  local backward = engine:calculate(
+    view,
+    origin,
+    motion_plan.build(target_match, "F"),
+    1,
+    true
+  )
+  same(domain.Position.new(1, 1), backward.endpoint)
+  list_same({ "b:(1,2)", "a:(1,1)" }, visits)
+end)
+
 for _, item in ipairs(tests) do
   local ok, failure = xpcall(item.body, debug.traceback)
   if not ok then