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xxhash tests
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Simon Cruanes
parent
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commit
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2 changed files with 148 additions and 0 deletions
11
tests/xxhash/dune
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11
tests/xxhash/dune
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(executable
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(name t_xxhash)
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(modules t_xxhash)
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(libraries containers containers.xxhash containers_testlib qcheck-core))
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(rule
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(alias runtest)
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(deps t_xxhash.exe)
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(package containers)
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(action
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(run ./t_xxhash.exe)))
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137
tests/xxhash/t_xxhash.ml
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137
tests/xxhash/t_xxhash.ml
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include (val Containers_testlib.make ~__FILE__ ())
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module H = Containers_xxhash
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(* Gold tests: hash_string with XXH64 *)
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;;
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t @@ fun () ->
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assert_equal ~printer:Int64.to_string (-1205034819632174695L)
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(H.hash_string ~seed:0L "");
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assert_equal ~printer:Int64.to_string (-3049013831022690741L)
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(H.hash_string ~seed:1L "");
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assert_equal ~printer:Int64.to_string (-7444071767201028348L)
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(H.hash_string ~seed:42L "");
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assert_equal ~printer:Int64.to_string 2994696410035606400L
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(H.hash_string ~seed:(-1L) "");
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assert_equal ~printer:Int64.to_string (-3292477735350538661L)
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(H.hash_string ~seed:0L "a");
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assert_equal ~printer:Int64.to_string (-2395144786285869370L)
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(H.hash_string ~seed:1L "a");
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assert_equal ~printer:Int64.to_string (-8582455328737087284L)
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(H.hash_string ~seed:42L "a");
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assert_equal ~printer:Int64.to_string 6972758980737027682L
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(H.hash_string ~seed:(-1L) "a");
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assert_equal ~printer:Int64.to_string 2794345569481354659L
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(H.hash_string ~seed:0L "hello");
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assert_equal ~printer:Int64.to_string 2584346877953614258L
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(H.hash_string ~seed:1L "hello");
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assert_equal ~printer:Int64.to_string (-4367754540140381902L)
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(H.hash_string ~seed:42L "hello");
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assert_equal ~printer:Int64.to_string 125878816811915416L
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(H.hash_string ~seed:(-1L) "hello");
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assert_equal ~printer:Int64.to_string (-4510281645523327586L)
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(H.hash_string ~seed:0L "hello, world!");
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assert_equal ~printer:Int64.to_string (-504920995464555508L)
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(H.hash_string ~seed:1L "hello, world!");
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assert_equal ~printer:Int64.to_string 6256815367265528243L
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(H.hash_string ~seed:42L "hello, world!");
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assert_equal ~printer:Int64.to_string 3946915247760971950L
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(H.hash_string ~seed:(-1L) "hello, world!");
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assert_equal ~printer:Int64.to_string 1513236774081638803L
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(H.hash_string ~seed:0L "the quick brown fox");
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assert_equal ~printer:Int64.to_string 4806561598883688116L
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(H.hash_string ~seed:1L "the quick brown fox");
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assert_equal ~printer:Int64.to_string 6882318601984224800L
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(H.hash_string ~seed:42L "the quick brown fox");
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assert_equal ~printer:Int64.to_string 3091774062649670660L
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(H.hash_string ~seed:(-1L) "the quick brown fox");
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true
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;;
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(* Gold tests: hash_string default seed=0 *)
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t @@ fun () ->
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assert_equal ~printer:Int64.to_string (-1205034819632174695L) (H.hash_string "");
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assert_equal ~printer:Int64.to_string (-3292477735350538661L)
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(H.hash_string "a");
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assert_equal ~printer:Int64.to_string 2794345569481354659L
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(H.hash_string "hello");
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true
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;;
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(* Gold tests: hash_int64 *)
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t @@ fun () ->
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assert_equal ~printer:Int64.to_string 3803688792395291579L (H.hash_int64 0L 0L);
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assert_equal ~printer:Int64.to_string (-6977822845260490347L)
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(H.hash_int64 1L 0L);
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assert_equal ~printer:Int64.to_string (-5379971487550586029L)
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(H.hash_int64 42L 0L);
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assert_equal ~printer:Int64.to_string (-8804195676797548855L)
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(H.hash_int64 (-1L) 0L);
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assert_equal ~printer:Int64.to_string (-7296932117151183542L)
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(H.hash_int64 1234567890123456789L 0L);
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true
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;;
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(* Gold tests: mix64 *)
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t @@ fun () ->
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assert_equal ~printer:Int64.to_string 2506089352882295055L (H.mix64 0L 1L);
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assert_equal ~printer:Int64.to_string (-7001672635703045582L) (H.mix64 1L 42L);
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assert_equal ~printer:Int64.to_string (-6036538516425062073L)
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(H.mix64 42L (-1L));
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assert_equal ~printer:Int64.to_string 3785813419010030675L
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(H.mix64 (-1L) 1234567890123456789L);
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assert_equal ~printer:Int64.to_string (-7296932117151183542L)
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(H.mix64 1234567890123456789L 0L);
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true
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;;
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(* Gold tests: finalize64 *)
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t @@ fun () ->
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assert_equal ~printer:Int64.to_string 3803688792395291579L (H.finalize64 0L);
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assert_equal ~printer:Int64.to_string (-6977822845260490347L) (H.finalize64 1L);
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assert_equal ~printer:Int64.to_string (-5379971487550586029L) (H.finalize64 42L);
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assert_equal ~printer:Int64.to_string (-8804195676797548855L)
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(H.finalize64 (-1L));
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assert_equal ~printer:Int64.to_string (-7296932117151183542L)
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(H.finalize64 1234567890123456789L);
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true
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;;
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(* Property tests: determinism *)
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q ~count:10_000 Q.string @@ fun s ->
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Int64.equal (H.hash_string s) (H.hash_string s)
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;;
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q ~count:10_000 Q.int64 @@ fun v ->
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Int64.equal (H.hash_int64 v 0L) (H.hash_int64 v 0L)
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;;
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q ~count:10_000 Q.int @@ fun v -> Int.equal (H.hash_int v 0) (H.hash_int v 0);;
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q ~count:10_000 Q.int64 @@ fun h ->
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Int64.equal (H.finalize64 h) (H.finalize64 h)
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;;
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(* mix64 is not commutative for most pairs *)
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q ~count:10_000 (Q.pair Q.int64 Q.int64) @@ fun (a, b) ->
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Q.assume (not (Int64.equal a b));
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let ab = H.mix64 a b in
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let ba = H.mix64 b a in
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not (Int64.equal ab ba)
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;;
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(* Stress test: hash many strings, non-empty => non-zero *)
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t @@ fun () ->
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for len = 0 to 99 do
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for _ = 1 to 1000 do
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let s = String.make len 'x' in
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let h = H.hash_string s in
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if len > 0 then
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if Int64.equal h 0L then
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failwith
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(Printf.sprintf "unexpected zero hash for string of len %d" len)
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done
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done;
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true
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let () = Containers_testlib.run_all ~descr:"test xxhash" [ get () ]
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