fix pagesize < 1

[perl/list-index.git] / t / 10-ranges.t

diff --git a/t/10-ranges.t b/t/10-ranges.t
index 9cfce11ff29f10398d192d187afad08dfcd6deab..01971c8988af506cdda5845d11671d99c1bb8a5c 100644 (file)
--- a/t/10-ranges.t
+++ b/t/10-ranges.t
@@ -2,7 +2,7 @@
 use strict;
 use warnings;
 
-use Test::More tests => 8;
+use Test::More tests => 9;
 use Test::NoWarnings;
 use Data::Dump 'pp';
 
@@ -10,7 +10,7 @@ BEGIN { use_ok('List::Index'); }
 ok(eval { List::Index->VERSION(1) }, 'version 1.00 compatibility');
 
 subtest 'single-char alphabet' => sub {
-       plan tests => 4;
+       plan tests => 5;
        my @uniform = 'a'..'z';
        my $index = List::Index->new(\@uniform) or return;
        is_deeply(\@uniform, ['a'..'z'], 'original data unaltered');
@@ -19,6 +19,7 @@ subtest 'single-char alphabet' => sub {
        is_deeply($index->ranges({pagesize => @uniform / 2.1}), [qw(
                -i j-q r-
        )], 'equivalent pagesize');
+       is_deeply($index->ranges({ pages => 500 }), ['-a', 'b'..'y', 'z-'], 'max pages');
 };
 
 subtest 'uniform alphanumeric' => sub {
@@ -125,6 +126,28 @@ subtest 'distribution' => sub {
        # page #16 [i-ie] (5): i iaab ibiavqyar idfniqvxpohbk idh
 };
 
+subtest 'modulo' => sub {
+       plan tests => 2;
+       my $index = List::Index->new([qw(
+               a b ccb   ccd  cce gf gg   gh  i j
+       )]) or return;
+       # 10 entries at 4 per page requires 3 pages
+       # so actual target page sizes should be 3,4,3 (not 4,4,2)
+
+       is_deeply(
+               $index->ranges({ pagesize=>4, context=>0 }),
+               [qw(-ccc ccd-gg gh-)],
+               'uniform page sizes'
+       );
+{ local $TODO = 'early lookbehind causing [c-gg]';
+       is_deeply(
+               $index->ranges({ pagesize=>4, context=>1 }),
+               [qw(-b c-h i-)],
+               'context at new intervals'
+       );
+}
+};
+
 subtest 'context' => sub {
        plan tests => 4;
        my $index = List::Index->new([qw(