tests of sequence operator with limit function having arity > 1

Signed-off-by: Moritz Lenz <moritz@faui2k3.org>

S03-sequence/limit-arity-2-or-more.t

@@ -0,0 +1,37 @@
+use v6;
+use Test;
+
+# L<S03/List infix precedence/"the sequence operator">
+
+plan 8;
+
+# sequence with a limit function of arity 2
+
+is (8,*/2 ... abs(*-*) < 2).join(', '), '8, 4, 2, 1', 'arity-2 convergence limit';
+is (8,*/2 ...^ abs(*-*) < 2).join(', '), '8, 4, 2', 'arity-2 excluded convergence limit';
+
+# sequence with a limit function of arity 3
+
+{
+  my $i = -5;
+  my @seq = { ++$i; $i**3-9*$i } ... { ($^a-$^b) > ($^b-$^c) };
+  is @seq.join(', '), '-28, 0, 10, 8, 0, -8, -10', 'arity-3 curvature limit';
+}
+
+{
+  my $i = -5;
+  my @seq = { ++$i; $i**3-9*$i } ...^ { ($^a-$^b) > ($^b-$^c) };
+  is @seq.join(', '), '-28, 0, 10, 8, 0, -8', 'arity-3 excluded curvature limit';
+}
+
+# limit functions that limit sequence exactly at arity limit
+
+is (2, 1, 0.5 ... abs(*-*) < 2).join(', '), '2, 1', 'ASAP arity-2 convergence limit';
+is (2, 1, 0.5 ...^ abs(*-*) < 2).join(', '), '2', 'ASAP arity-2 excluded convergence limit';
+
+# limit function that accepts any number of args
+
+is (1 ... { @_ eq "1 2 3" }).join(', '), '1, 2, 3', 'arity-Inf limit';
+is (1 ...^ { @_ eq "1 2 3" }).join(', '), '1, 2', 'arity-Inf excluded limit';
+
+done;