XXX: distribution test

diff --git a/t/10-ranges.t b/t/10-ranges.t
index 84f4dbbc7f64dca807831325c08d2a4f29b9aece..cf3b0a43addfdcd94ccff68764967358e783f7ce 100644 (file)
--- a/t/10-ranges.t
+++ b/t/10-ranges.t
@@ -2,7 +2,7 @@
 use strict;
 use warnings;
 
-use Test::More tests => 7;
+use Test::More tests => 8;
 use Test::NoWarnings;
 use Data::Dump 'pp';
 
@@ -85,13 +85,13 @@ TODO: {
                # disallow backtracking of 'lguq' to 'lc' to prevent qw[-k l-]
                # so only lookahead (to 'lkq') remains
                [qw(-k l-lj lk-)],
-               'no lookbehind after full lookahead'
+               'lookbehind forbidden'
        );
        is_deeply(
                $index->ranges({ pagesize=>10, context=>9 }),
                # allow a single (10-9) entry (l-lf = lc) to remain
                [qw(-k l-lf lg-)],
-               'lookbehind after full lookahead'
+               'lookbehind penalty'
        );
        is_deeply(
                $index->ranges({ pagesize=>10, context=>10 }),
@@ -101,6 +101,32 @@ TODO: {
        );
 };
 
+subtest 'distribution' => sub {
+       plan tests => 2;
+       my $index = List::Index->new([qw(
+               gnihka gniub go gsearnrqns gtdvcxyt gw gwoufolwcvmtueyg gysgphci h habkdgifjfxoh
+               hbbvjf hbqleexnqts hccg hd hdoeqwdmgqwaoya hfbegicieuxz hfm hj hkoysmws hmylu
+               hnvtvpievbdlkrmb hs hvdvcqn hvn hyrybeur iaiaab ib ibavqyar idfniqvxpohbk idh
+       )]) or return;
+       is_deeply(
+               $index->ranges({ pagesize=>10, context=>6 }),
+               [qw(-g h i-)],
+               'large context'
+       );
+{ local $TODO = '?';
+       is_deeply(
+               $index->ranges({ pagesize=>10, context=>5 }),
+               # after 2nd page is enlarged by lookbehind to 'h', limit subsequent lookahead
+               # to prevent the page from getting too large (17 entries if forwarded to 'i')
+               [qw(-g h-hm hn-)],
+               'lookahead penalty'
+       );
+       # page #14 [gn-g] (8): gnihka gniub go gsearnrqns gtdvcxyt gwawkvmueovdjtfj gwoufolwcvmtueyg gysgphci
+       # page #15 [h] (17): h habkdgifjfxoh hbbvjf hbqleexnqts hccgszftbaymfu hdaqzkow hdoeqwdmgqwaoya hfbegicieu hfmlpzzioqjbthz hj hkoysmws hmylu hnvtvpievbdlkrmb hsodfpkatk hvdvcqn hvn hyrybeurqtevjfmi
+       # page #16 [i-ie] (5): i iaab ibiavqyar idfniqvxpohbk idh
+}
+};
+
 subtest 'context' => sub {
        plan tests => 4;
        my $index = List::Index->new([qw(