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failing composition of delete on split insert #23

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12 changes: 12 additions & 0 deletions test/delta/delta/compose_test.exs
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Original file line number Diff line number Diff line change
Expand Up @@ -337,4 +337,16 @@ defmodule Tests.Delta.Compose do
assert Delta.compose(a, b) == expected
end
end

test "regression 6/4/2025" do
seq = [
%{"attributes" => %{"A" => "B"}, "insert" => "A"},
%{"insert" => "BC"},
%{"insert" => "E"},
]

change = [%{"delete" => 2}]

assert [%{"insert" => "CE"}] = Delta.compose(seq, change)
end
end