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diff --git a/t/t0202/test.pl b/t/t0202/test.pl
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+#!/usr/bin/perl
+use 5.008;
+use lib (split(/:/, $ENV{GITPERLLIB}));
+use strict;
+use warnings;
+use POSIX qw(:locale_h);
+use Test::More tests => 13;
+use Git::I18N;
+
+my $has_gettext_library = $Git::I18N::__HAS_LIBRARY;
+
+ok(1, "Testing Git::I18N with " .
+ ($has_gettext_library
+ ? (defined $Locale::Messages::VERSION
+ ? "Locale::Messages version $Locale::Messages::VERSION"
+ # Versions of Locale::Messages before 1.17 didn't have a
+ # $VERSION variable.
+ : "Locale::Messages version <1.17")
+ : "NO Perl gettext library"));
+ok(1, "Git::I18N is located at $INC{'Git/I18N.pm'}");
+
+{
+ my $exports = @Git::I18N::EXPORT;
+ ok($exports, "sanity: Git::I18N has $exports export(s)");
+}
+is_deeply(\@Git::I18N::EXPORT, \@Git::I18N::EXPORT_OK, "sanity: Git::I18N exports everything by default");
+
+# prototypes
+{
+ # Add prototypes here when modifying the public interface to add
+ # more gettext wrapper functions.
+ my %prototypes = (qw(
+ __ $
+ __n $$$
+ N__ $
+ ));
+ while (my ($sub, $proto) = each %prototypes) {
+ is(prototype(\&{"Git::I18N::$sub"}), $proto, "sanity: $sub has a $proto prototype");
+ }
+}
+
+# Test basic passthrough in the C locale
+{
+ local $ENV{LANGUAGE} = 'C';
+ local $ENV{LC_ALL} = 'C';
+ local $ENV{LANG} = 'C';
+
+ my ($got, $expect) = (('TEST: A Perl test string') x 2);
+
+ is(__($got), $expect, "Passing a string through __() in the C locale works");
+
+ my ($got_singular, $got_plural, $expect_singular, $expect_plural) =
+ (('TEST: 1 file', 'TEST: n files') x 2);
+
+ is(__n($got_singular, $got_plural, 1), $expect_singular,
+ "Get singular string through __n() in C locale");
+ is(__n($got_singular, $got_plural, 2), $expect_plural,
+ "Get plural string through __n() in C locale");
+
+ is(N__($got), $expect, "Passing a string through N__() in the C locale works");
+}
+
+# Test a basic message on different locales
+SKIP: {
+ unless ($ENV{GETTEXT_LOCALE}) {
+ # Can't reliably test __() with a non-C locales because the
+ # required locales may not be installed on the system.
+ #
+ # We test for these anyway as part of the shell
+ # tests. Skipping these here will eliminate failures on odd
+ # platforms with incomplete locale data.
+
+ skip "GETTEXT_LOCALE must be set by lib-gettext.sh for exhaustive Git::I18N tests", 2;
+ }
+
+ # The is_IS UTF-8 locale passed from lib-gettext.sh
+ my $is_IS_locale = $ENV{is_IS_locale};
+
+ my $test = sub {
+ my ($got, $expect, $msg, $locale) = @_;
+ # Maybe this system doesn't have the locale we're trying to
+ # test.
+ my $locale_ok = setlocale(LC_ALL, $locale);
+ is(__($got), $expect, "$msg a gettext library + <$locale> locale <$got> turns into <$expect>");
+ };
+
+ my $env_C = sub {
+ $ENV{LANGUAGE} = 'C';
+ $ENV{LC_ALL} = 'C';
+ };
+
+ my $env_is = sub {
+ $ENV{LANGUAGE} = 'is';
+ $ENV{LC_ALL} = $is_IS_locale;
+ };
+
+ # Translation's the same as the original
+ my ($got, $expect) = (('TEST: A Perl test string') x 2);
+
+ if ($has_gettext_library) {
+ {
+ local %ENV; $env_C->();
+ $test->($got, $expect, "With", 'C');
+ }
+
+ {
+ my ($got, $expect) = ($got, 'TILRAUN: Perl tilraunastrengur');
+ local %ENV; $env_is->();
+ $test->($got, $expect, "With", $is_IS_locale);
+ }
+ } else {
+ {
+ local %ENV; $env_C->();
+ $test->($got, $expect, "Without", 'C');
+ }
+
+ {
+ local %ENV; $env_is->();
+ $test->($got, $expect, "Without", 'is');
+ }
+ }
+}