test invert on list of pairs

S02-types/pair.t

@@ -2,7 +2,7 @@ use v6;
 
 use Test;
 
-plan 106;
+plan 108;
 
 # L<S02/Mutable types/A single key-to-value association>
 # basic Pair
@@ -332,6 +332,9 @@ Note, "non-chaining binary" was later renamed to "structural infix".
     is (a => [3,4]).invert».key, '3 4', 'Pair.invert splits positional values and preserves order';
     isa_ok (a => [3,4]).invert[0].key, Int, 'Pair.invert.key type';
     is (a => [3,4]).invert».value, 'a a', 'Pair.invert splits positional values and dups keys';
+
+    is <a b c>.pairs.invert.perl, '("a" => 0, "b" => 1, "c" => 2).list', 'list of array pairs can be inverted';
+    is { a => (1,2), b => <x y z> }.pairs.invert.sort.gist, '1 => a 2 => a x => b y => b z => b', 'list of hash pairs can be inverted';
 }
 
 # RT #123215