Add from-loop tests

S32-list/seq.t

@@ -1,7 +1,7 @@
 use v6;
 use Test;
 
-plan 28;
+plan 35;
 
 my @result = 1,2,3;
 
@@ -126,3 +126,19 @@ is-deeply @searches[0].Array, @expected-searches, 'seq => array works 3';
     throws-like { roundtripped.list }, X::Seq::Consumed,
         '.perl on an iterated sequence faithfully reproduces such a sequence';
 }
+
+{
+    my $a = Seq.from-loop({ 1 });
+    isa-ok $a, Seq, 'from-loop(&body) returns a Seq';
+    ok $a.is-lazy, 'the Seq object is lazy';
+
+    $a = Seq.from-loop({ 1 }, { state $count = 0; $count++ < 10 });
+    isa-ok $a, Seq, 'from-loop(&body, &condition) returns a Seq';
+    is $a, (1) xx 10, 'from-loop(&body, &condition) terminates calling &body if &condition returns False';
+
+    my $count = 0;
+    $a = Seq.from-loop({ 1 }, { $count < 10 }, { $count++ });
+    isa-ok $a, Seq, 'from-loop(&body, &condition, &afterward) returns a Seq';
+    is $a, (1) xx 10, 'from-loop(&body, &condition, &afterward) terminates calling &body if &condition returns False';
+    is $count, 10, '&afterward is called after each call to &body.';
+}