use strict;
use warnings;
-use Test::More tests => 7;
+use Test::More tests => 10;
use Test::NoWarnings;
use Data::Dump 'pp';
BEGIN { use_ok('List::Index'); }
ok(eval { List::Index->VERSION(1) }, 'version 1.00 compatibility');
-subtest 'single-char alphabet' => sub {
- plan tests => 4;
- my @uniform = 'a'..'z';
- my $index = List::Index->new(\@uniform) or return;
- is_deeply(\@uniform, ['a'..'z'], 'original data unaltered');
- is_deeply($index->ranges, ['-'], 'single page');
- is_deeply($index->ranges({pages => 3}), [qw(-i j-q r-)], 'given pages');
- is_deeply($index->ranges({pagesize => @uniform / 2.1}), [qw(
- -i j-q r-
- )], 'equivalent pagesize');
+eval { Test::More->VERSION(0.93) } or eval q{
+ diag "Install Test::More v0.93 to run subtests\n";
+ sub subtest {
+ SKIP: { skip 'subtest', 1; }
+ }
};
-subtest 'uniform alphanumeric' => sub {
- plan tests => 2;
- my $index = List::Index->new(['aa'..'zz', 1..202]) or return;
- is_deeply($index->ranges, [qw(
- -.
- .-bp bq-dm dn-fi fj-hf hg-i j-k l-m n-os ot-qp qq-sm sn-uj uk-wf wg-x y-
+subtest('single-char alphabet' => sub {
+ plan tests => 5;
+ my @data = ('a'..'z');
- )], 'default ranges');
- is_deeply($index->ranges({pagesize => 300}), [qw(-c d-n o-)], 'large pagesize');
-};
-
-subtest 'context' => sub {
- plan tests => 4;
- my $index = List::Index->new([qw(
- baa1 baa2 baa3 baaa bbc cbc daaa ea eaaa zed
- )]) or return;
- is_deeply($index->ranges({pagesize => 2, context => 0}), [
- qw(-baa. baa.-bbb bbc-daa. daaa-eaa. eaaa-)
- ], 'no context');
- is_deeply($index->ranges({pagesize => 2}), [
- qw(-a b c d e-)
- ], 'default context'); # context should be 1
- is_deeply($index->ranges({pagesize => 2, context => 2}), [
- qw(-a b-c d e-)
- ], 'overlap'); # first item equals second due to large context
- is_deeply($index->ranges({pagesize => 2, context => 0, length => 1}), [
- qw(-a b-c d e-)
- ], 'single char');
-
- #pp($index->ranges({pagesize => 2, context => 2, length => 1}));
-};
+ is_deeply(List::Index->new->ranges(\@data), ['-'], 'single page');
+ is_deeply(\@data, ['a'..'z'], 'original data unaltered');
+ is_deeply(
+ List::Index->new({ pages => 3 })->ranges(\@data),
+ [qw(-i j-q r-)],
+ 'given pages'
+ );
+ is_deeply(
+ List::Index->new({ pagesize => @data / 2.1 })->ranges(\@data),
+ [qw(-i j-q r-)],
+ 'equivalent pagesize'
+ );
+ is_deeply(
+ List::Index->new({ pages => 500 })->ranges(\@data),
+ ['-a', 'b'..'y', 'z-'],
+ 'max pages'
+ );
+});
-subtest 'distribution' => sub {
+subtest('uniform alphanumeric' => sub {
plan tests => 2;
- my $index = List::Index->new([qw(
+ my @data = ('aa'..'zz', 1..202);
+ my $index = List::Index->new or return;
+
+ is_deeply(
+ $index->ranges(\@data),
+ [qw(
+ -.. ..-...
+ ...-bp bq-dm dn-fi fj-hf hg-i j-k l-m n-os ot-qp qq-sm sn-uj uk-wf wg-x y-
+ )],
+ 'default ranges'
+ );
+ is_deeply(
+ $index->ranges(\@data, { pagesize => 300 }),
+ [qw(-c d-n o-)],
+ 'large pagesize'
+ );
+});
+
+subtest('context' => sub {
+ plan tests => 9;
+ my @data = qw(
kkeg kl km kmlu knsy koxb kpeo kuaa kuab kuac
- kuap kuaq kuq kux kzb lc lg lgu lgua lguc
+ kuapa kuq kur kux kzb lc lg lgu lgua lguc
lguq lgur lgus lgx lka lkq lks lln llq llx
- )]) or return;
-TODO: {
- local $TODO = 'under development';
+ );
+ my $index = List::Index->new({ pagesize => 10 }) or return;
+
+ is_deeply(
+ $index->ranges(\@data, { context => 0, length => 5 }),
+ # ranges should match offsets exactly
+ [qw(-kuap. kuapa-lgup lguq-)],
+ 'no context'
+ );
+ is_deeply(
+ $index->ranges(\@data, { context => 0 }),
+ # default length limits to 4 chars
+ [qw(-kuao kuap-lgup lguq-)],
+ 'default length'
+ );
+ is_deeply(
+ $index->ranges(\@data, { context => 1 }),
+ # lookbehinds aren't shorter (kuac<kuap, lguc<lguq)
+ # 'kuap' can advance to 'kuq'
+ [qw(-kup kuq-lgup lguq-)],
+ 'lookahead'
+ );
+ is_deeply(
+ $index->ranges(\@data, { context => 2 }),
+ # allowed to advance to 'kur', but provides no benefits over 'kuq'
+ [qw(-kup kuq-lgup lguq-)],
+ 'minimal lookahead'
+ );
is_deeply(
- $index->ranges({ pagesize=>10, context=>3 }),
+ $index->ranges(\@data, { context => 3 }),
# shorten 'kuap' to 'ku' because lookbehind is 'kp...'
# 'lguq' matches 'lg', but may only backtrack to 'lgu'
[qw(-kt ku-lgt lgu-)],
'lookbehind'
);
-}
is_deeply(
- $index->ranges({ pagesize=>10, context=>4 }),
+ $index->ranges(\@data, { context => 4 }),
[qw(-kt ku-lf lg-)],
'maximal lookahead'
);
-}
+ is_deeply(
+ $index->ranges(\@data, { context => 5 }),
+ # after forwarding 'kuap' to 'lc'
+ # disallow backtracking of 'lguq' to 'lc' to prevent qw[-k l-]
+ # so only lookahead (to 'lkq') remains
+ [qw(-k l-lj lk-)],
+ 'lookbehind forbidden'
+ );
+ is_deeply(
+ $index->ranges(\@data, { context => 9 }),
+ # allow a single (10-9) entry (l-lf = lc) to remain
+ [qw(-k l-lf lg-)],
+ 'lookbehind penalty'
+ );
+ is_deeply(
+ $index->ranges(\@data, { context => 10 }),
+ # allow the last page to go back upto 'lc', replacing the 2nd page
+ [qw(-k l-)],
+ 'full overlap'
+ );
+});
+
+subtest('distribution' => sub {
+ plan tests => 2;
+ my @data = 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
+ );
+ my $index = List::Index->new({ pagesize => 10 }) or return;
+
+ is_deeply(
+ $index->ranges(\@data, { context => 7 }),
+ [qw(-g h i-)],
+ 'large context'
+ );
+ is_deeply(
+ $index->ranges(\@data, { context => 6 }),
+ # 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('modulo' => sub {
+ plan tests => 2;
+ my @data = qw( a b ccb ccd cce gf ggg ggh i j );
+ my $index = List::Index->new({ pagesize => 4, context => 0 }) 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(\@data),
+ [qw(-ccc ccd-ggg ggh-)],
+ 'uniform page sizes'
+ );
+ is_deeply(
+ $index->ranges(\@data, { context => 1 }),
+ [qw(-b c-gf gg-)],
+ 'context at new intervals'
+ );
+});
+
+subtest('corner cases' => sub {
+ plan tests => 1;
+
+ is_deeply(
+ List::Index->new->ranges(['foo','bar']),
+ ['-'],
+ '2 rows 1 page'
+ );
+});
+
+subtest('context' => sub {
+ plan tests => 4;
+ my @data = qw( baa1 baa2 baa3 baaa bbc cbc daaa ea eaaa zed );
+ my $index = List::Index->new({ pagesize => 2 }) or return;
+
+ is_deeply(
+ $index->ranges(\@data, { context => 0 }),
+ [qw(-baa. baa.-bbb bbc-daa. daaa-eaa. eaaa-)],
+ 'no context'
+ );
+ is_deeply(
+ $index->ranges(\@data, { context => undef }),
+ [qw(-baa. baa.-b c d e-)],
+ 'default context' # context should be 1
+ );
+ is_deeply(
+ $index->ranges(\@data, { context => 2 }),
+ # first item equals second due to large context
+ [qw(-ba bb-b c d e-)],
+ 'overlap'
+ );
+ is_deeply(
+ $index->ranges(\@data, { context => 0, length => 1 }),
+ [qw(-a b-c d e-)],
+ 'single char'
+ );
+
+ #pp(List::Index->new({pagesize => 2, context => 2, length => 1}))->ranges(\@data);
+});
git.shiar.nl / perl / list-index.git / blobdiff