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|
package Util;
use strict;
use warnings;
use Carp qw[];
use IO::File qw[SEEK_SET SEEK_END];
use Test::Fatal qw[exception];
BEGIN {
our @EXPORT_OK = qw[ throws_ok warns_ok pack_utf8 pack_overlong_utf8 rewind slurp ];
our %EXPORT_TAGS = (
all => [ @EXPORT_OK ],
);
require Exporter;
*import = \&Exporter::import;
}
my @UTF8_MIN = (0x80, 0x800, 0x10000, 0x200000, 0x4000000, 0x80000000);
sub pack_utf8 ($;$) {
my ($cp, $len) = @_;
($cp >= 0 && $cp < 0x80000000)
|| Carp::confess(qq/Cannot pack '$cp'/);
(@_ == 1 || ($len > 0 && $len <= 6 && $cp < $UTF8_MIN[$len - 1]))
|| Carp::confess(qq/Cannot pack '$cp' to sequence length '$len'/);
my @c = (0) x ($len || ($cp < 0x80 ? 1 : $cp < 0x800 ? 2
: $cp < 0x10000 ? 3 : $cp < 0x200000 ? 4
: $cp < 0x4000000 ? 5 : 6));
for (reverse @c[1..$#c]) {
$_ = ($cp & 0x3F) | 0x80;
$cp >>= 6;
}
$c[0] = $cp | (0x00, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC)[$#c];
return pack('C*', @c);
}
sub pack_overlong_utf8 ($) {
my ($cp) = @_;
($cp >= 0 && $cp < 0x4000000)
|| Carp::confess(qq/Cannot pack '$cp'/);
my @enc;
for (my $i = 0; $i < 5; $i++) {
next unless $cp < $UTF8_MIN[$i];
push @enc, pack_utf8($cp, $i + 2);
}
return wantarray ? @enc : $enc[0];
}
my $Tester;
sub throws_ok (&$;$) {
my ($code, $regexp, $name) = @_;
require Test::Builder;
$Tester ||= Test::Builder->new;
my $e = exception(\&$code);
my $ok = ($e && $e =~ m/$regexp/);
$Tester->ok($ok, $name);
unless ($ok) {
if ($e) {
$Tester->diag("expecting: " . $regexp);
$Tester->diag("found: " . $e);
}
else {
$Tester->diag("expected an exception but none was raised");
}
}
}
sub warns_ok (&$;$) {
my ($code, $regexp, $name) = @_;
require Test::Builder;
$Tester ||= Test::Builder->new;
my @warnings = ();
local $SIG{__WARN__} = sub { push @warnings, @_ };
my $e = exception(\&$code);
my $ok = (!$e && @warnings == 1 && $warnings[0] =~ m/$regexp/);
$Tester->ok($ok, $name);
unless ($ok) {
if ($e) {
$Tester->diag("expected a warning but an exception was raised");
$Tester->diag("exception: " . $e);
}
elsif (@warnings == 0) {
$Tester->diag("expected a warning but none were issued");
}
elsif (@warnings >= 2) {
$Tester->diag("expected a warning but several were issued");
$Tester->diag("warnings: " . join '', @warnings);
}
else {
$Tester->diag("expecting: " . $regexp);
$Tester->diag("found: " . $warnings[0]);
}
}
}
sub rewind(*) {
seek($_[0], 0, SEEK_SET)
|| die(qq/Couldn't rewind file handle: '$!'/);
}
sub slurp (*) {
my ($fh) = @_;
seek($fh, 0, SEEK_END)
|| die(qq/Couldn't navigate to EOF on file handle: '$!'/);
my $exp = tell($fh);
rewind($fh);
binmode($fh)
|| die(qq/Couldn't binmode file handle: '$!'/);
my $buf = do { local $/; <$fh> };
my $got = length $buf;
($exp == $got)
|| die(qq[I/O read mismatch (expexted: $exp got: $got)]);
return $buf;
}
1;
|
