69 lines
2.2 KiB
Text
69 lines
2.2 KiB
Text
def check (b : Bool) : IO Unit :=
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unless b $ IO.println "ERROR"
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def sz {α β : Type} {lt : α → α → Bool} (m : RBMap α β lt) : Nat :=
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m.fold (fun sz _ _ => sz+1) 0
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def depth {α β : Type} {lt : α → α → Bool} (m : RBMap α β lt) : Nat :=
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m.depth Nat.max
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def tst1 : IO Unit :=
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do let Map := RBMap String Nat (fun a b => a < b);
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let m : Map := {};
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let m := m.insert "hello" 0;
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let m := m.insert "world" 1;
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check (m.find? "hello" == some 0);
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check (m.find? "world" == some 1);
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let m := m.erase "hello";
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check (m.find? "hello" == none);
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check (m.find? "world" == some 1);
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pure ()
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def tst2 : IO Unit :=
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do let Map := RBMap Nat Nat (fun a b => a < b);
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let m : Map := {};
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let n : Nat := 10000;
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let m := n.fold (fun i (m : Map) => m.insert i (i*10)) m;
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check (m.all (fun k v => v == k*10));
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check (sz m == n);
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IO.println (">> " ++ toString (depth m) ++ ", " ++ toString (sz m));
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let m := (n/2).fold (fun i (m : Map) => m.erase (2*i)) m;
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check (m.all (fun k v => v == k*10));
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check (sz m == n / 2);
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IO.println (">> " ++ toString (depth m) ++ ", " ++ toString (sz m));
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pure ()
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abbrev Map := RBMap Nat Nat (fun a b => a < b)
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def mkRandMap (max : Nat) : Nat → Map → Array (Nat × Nat) → IO (Map × Array (Nat × Nat))
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| 0, m, a => pure (m, a)
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| n+1, m, a => do
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k ← IO.rand 0 max;
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v ← IO.rand 0 max;
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if m.find? k == none then do
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let m := m.insert k v;
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let a := a.push (k, v);
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mkRandMap n m a
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else
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mkRandMap n m a
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def tst3 (seed : Nat) (n : Nat) (max : Nat) : IO Unit :=
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do IO.setRandSeed seed;
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(m, a) ← mkRandMap max n {} Array.empty;
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check (sz m == a.size);
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check (a.all (fun ⟨k, v⟩ => m.find? k == some v));
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IO.println ("tst3 size: " ++ toString a.size);
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let m := a.iterate m (fun i ⟨k, v⟩ m => if i.val % 2 == 0 then m.erase k else m);
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check (sz m == a.size / 2);
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a.iterateM () (fun i ⟨k, v⟩ _ => when (i.val % 2 == 1) (check (m.find? k == some v)));
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IO.println ("tst3 after, depth: " ++ toString (depth m) ++ ", size: " ++ toString (sz m));
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pure ()
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def main (xs : List String) : IO Unit :=
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tst1 *> tst2 *>
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tst3 1 1000 20000 *>
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tst3 2 1000 40000 *>
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tst3 3 100 4000 *>
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tst3 4 5000 100000 *>
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tst3 5 1000 40000 *>
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pure ()
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