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Add a test for mutual recursion with records
Signed-off-by: Kakadu <[email protected]>
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Original file line number | Diff line number | Diff line change |
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open QCheck2 | ||
open Helpers | ||
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type tree = Leaf | Node of tree * tree | ||
and name = { a: tree } | ||
[@@deriving qcheck2] | ||
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let rec pp_tree fmt x = | ||
let open Format in | ||
match x with | ||
| Leaf -> | ||
fprintf fmt "Leaf" | ||
| Node (l, r) -> | ||
fprintf fmt "Node (%a, %a)" | ||
(pp_tree ) l | ||
(pp_tree ) r | ||
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let eq_tree = Alcotest.of_pp (pp_tree ) | ||
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let gen_tree_ref = | ||
let open Gen in | ||
sized @@ fix (fun self -> | ||
function | ||
| 0 -> pure Leaf | ||
| n -> | ||
oneof [ | ||
pure Leaf; | ||
map2 (fun l r -> Node (l,r)) (self (n/2)) (self (n/2)); | ||
]) | ||
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let test_tree_ref () = | ||
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test_compare ~msg:"gen tree <=> derivation tree" | ||
~eq:(eq_tree ) | ||
(gen_tree_ref) (gen_tree ) | ||
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let test_leaf = | ||
Test.make | ||
~name:"gen_tree_sized 0 = Node (_, Leaf, Leaf)" | ||
(gen_tree_sized 0) | ||
(function | ||
| Leaf -> true | ||
| Node (Leaf, Leaf) -> true | ||
| _ -> false) | ||
|> | ||
QCheck_alcotest.to_alcotest | ||
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let () = Alcotest.run "Test_Recursive" | ||
[("Recursive", | ||
Alcotest.[ | ||
test_case "test_tree_ref" `Quick test_tree_ref; | ||
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])] |