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tests/functional/lang: Add sort stability test for lists langer than 16 elements

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libstdc++'s std::stable_sort and new builtins.sort implementation
special-case ranges with length less than or equal to 16 and delegate
to insertionsort.

Having a larger e2e test would allow catching sort stability issues
at functional level as well.
This commit is contained in:
Sergei Zimmerman 2025-06-15 16:51:44 +00:00
parent ddcfc81ff1
commit f9170a84f6
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GPG key ID: A9B0B557CA632325
2 changed files with 75 additions and 1 deletions
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2
tests/functional/lang/eval-okay-sort.exp
View file

@ -1 +1 @@
[ [ 42 77 147 249 483 526 ] [ 526 483 249 147 77 42 ] [ "bar" "fnord" "foo" "xyzzy" ] [ { key = 1; value = "foo"; } { key = 1; value = "fnord"; } { key = 2; value = "bar"; } ] [ [ ] [ ] [ 1 ] [ 1 4 ] [ 1 5 ] [ 1 6 ] [ 2 ] [ 2 3 ] [ 3 ] [ 3 ] ] ]
[ [ 42 77 147 249 483 526 ] [ 526 483 249 147 77 42 ] [ "bar" "fnord" "foo" "xyzzy" ] [ { key = 1; value = "foo"; } { key = 1; value = "fnord"; } { key = 2; value = "bar"; } ] [ { key = 1; value = "foo"; } { key = 1; value = "foo2"; } { key = 1; value = "foo3"; } { key = 1; value = "foo4"; } { key = 1; value = "foo5"; } { key = 1; value = "foo6"; } { key = 1; value = "foo7"; } { key = 1; value = "foo8"; } { key = 2; value = "bar"; } { key = 2; value = "bar2"; } { key = 2; value = "bar3"; } { key = 2; value = "bar4"; } { key = 2; value = "bar5"; } { key = 3; value = "baz"; } { key = 3; value = "baz2"; } { key = 3; value = "baz3"; } { key = 3; value = "baz4"; } { key = 4; value = "biz1"; } ] [ [ ] [ ] [ 1 ] [ 1 4 ] [ 1 5 ] [ 1 6 ] [ 2 ] [ 2 3 ] [ 3 ] [ 3 ] ] ]

74
tests/functional/lang/eval-okay-sort.nix
View file

@ -37,6 +37,80 @@ with builtins;
value = "fnord";
}
])
(sort (x: y: x.key < y.key) [
{
key = 1;
value = "foo";
}
{
key = 2;
value = "bar";
}
{
key = 1;
value = "foo2";
}
{
key = 2;
value = "bar2";
}
{
key = 2;
value = "bar3";
}
{
key = 2;
value = "bar4";
}
{
key = 1;
value = "foo3";
}
{
key = 3;
value = "baz";
}
{
key = 3;
value = "baz2";
}
{
key = 1;
value = "foo4";
}
{
key = 3;
value = "baz3";
}
{
key = 1;
value = "foo5";
}
{
key = 1;
value = "foo6";
}
{
key = 2;
value = "bar5";
}
{
key = 3;
value = "baz4";
}
{
key = 1;
value = "foo7";
}
{
key = 4;
value = "biz1";
}
{
key = 1;
value = "foo8";
}
])
(sort lessThan [
[
1