#!/usr/bin/env perl
use strict;
use warnings;

use Test::More;
use FindBin;
my $dir;
BEGIN { $dir = $FindBin::Bin . '/' };
use lib $dir;

my $module = $ENV{EXERCISM} ? 'Example' : 'SumOfMultiples';

my @cases = (
    {
        factors => [3, 5],
        limit => 1,
        expected => 0
    },
    {
        factors => [3, 5],
        limit => 4,
        expected => 3
    },
    {
        factors => [3, 5],
        limit => 10,
        expected => 23
    },
    {
        factors => [3, 5],
        limit => 100,
        expected => 2318
    },
    {
        factors => [3, 5],
        limit => 1000,
        expected => 233168
    },
    {
        factors => [7, 13, 17],
        limit => 20,
        expected => 51
    },
    {
        factors => [4, 6],
        limit => 15,
        expected => 30
    },
    {
        factors => [5, 6, 8],
        limit => 150,
        expected => 4419
    },
    {
        factors => [5, 25],
        limit => 51,
        expected => 275
    },
    {
        factors => [43, 47],
        limit => 10000,
        expected => 2203160
    },
    {
        factors => [1],
        limit => 100,
        expected => 4950
    },
    {
        factors => [],
        limit => 10000,
        expected => 0
    }
);

plan tests => 4 + scalar @cases;

ok -e "${dir}${module}.pm", "Missing $module.pm"
        or BAIL_OUT "You need to create file: $module.pm";

eval "use $module";
ok !$@, "Cannot load $module"
        or BAIL_OUT "Cannot load $module; Does it compile? Does it end with 1;?";

can_ok $module, "new"
        or BAIL_OUT "Missing package $module; or missing sub new()";
can_ok $module, "to"
        or BAIL_OUT "Missing package $module; or missing sub to()";


for my $case (@cases) {
    my @factors = @{$case->{factors}};
    my $desc = sprintf "Multiples of %s up to %s equals %s",
                       (scalar @factors ? (join ' and ', @factors) : 'nothing'),
                       $case->{limit}, $case->{expected};

    is $module->new(@factors)->to($case->{limit}), $case->{expected}, $desc;
}