From: Michael G. Schwern <schwern@pobox.com>
Date: Sat, 14 Apr 2001 22:40:50 +0000 (+0100)
Subject: Testing Exporter
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=94dd7035021119c19976ce521595a75460510f9c;p=p5sagit%2Fp5-mst-13.2.git

Testing Exporter
Message-ID: <20010414224050.A1872@blackrider.blackstar.co.uk>

p4raw-id: //depot/perl@9712
---

diff --git a/MANIFEST b/MANIFEST
index 1e7134c..d12e44e 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -1480,6 +1480,7 @@ t/lib/english.t		See if English works
 t/lib/env-array.t	See if Env works for arrays
 t/lib/env.t		See if Env works
 t/lib/errno.t		See if Errno works
+t/lib/exporter.t        See if Exporter works
 t/lib/fatal.t           See if Fatal works
 t/lib/fields.t          See if base/fields works
 t/lib/filecache.t	See if FileCache works
diff --git a/lib/Exporter/Heavy.pm b/lib/Exporter/Heavy.pm
index 1305318..e3fd897 100644
--- a/lib/Exporter/Heavy.pm
+++ b/lib/Exporter/Heavy.pm
@@ -218,11 +218,11 @@ sub require_version {
     my($self, $wanted) = @_;
     my $pkg = ref $self || $self;
     my $version = ${"${pkg}::VERSION"};
-    if (!$version or $version < $wanted) {
-	$version ||= "(undef)";
+    if (!defined $version or $version < $wanted) {
+	$version = defined $version ? $version : "(undef)";
 	    # %INC contains slashes, but $pkg contains double-colons.
 	my $file = (map {s,::,/,g; $INC{$_}} "$pkg.pm")[0];
-	$file &&= " ($file)";
+	$file = defined $file ? " ($file)" : '';
 	require Carp;
 	Carp::croak("$pkg $wanted required--this is only version $version$file")
     }
diff --git a/t/lib/exporter.t b/t/lib/exporter.t
new file mode 100644
index 0000000..d5c4073
--- /dev/null
+++ b/t/lib/exporter.t
@@ -0,0 +1,145 @@
+#!./perl
+
+BEGIN {
+    chdir 't' if -d 't';
+    @INC = '../lib';
+}
+
+# Utility testing functions.
+my $test_num = 1;
+sub ok ($;$) {
+    my($test, $name) = @_;
+    print "not " unless $test;
+    print "ok $test_num";
+    print " - $name" if defined $name;
+    print "\n";
+    $test_num++;
+}
+
+
+my $loaded;
+BEGIN { $| = 1; $^W = 1; }
+END {print "not ok $test_num\n" unless $loaded;}
+print "1..$Total_tests\n";
+use Exporter;
+$loaded = 1;
+ok(1, 'compile');
+
+
+BEGIN {
+    # Methods which Exporter says it implements.
+    @Exporter_Methods = qw(import
+                           export_to_level
+                           require_version
+                           export_fail
+                          );
+}
+
+BEGIN { $Total_tests = 14 + @Exporter_Methods }
+
+package Testing;
+require Exporter;
+@ISA = qw(Exporter);
+
+# Make sure Testing can do everything its supposed to.
+foreach my $meth (@::Exporter_Methods) {
+    ::ok( Testing->can($meth), "subclass can $meth()" );
+}
+
+%EXPORT_TAGS = (
+                This => [qw(stuff %left)],
+                That => [qw(Above the @wailing)],
+                tray => [qw(Fasten $seatbelt)],
+               );
+@EXPORT    = qw(lifejacket);
+@EXPORT_OK = qw(under &your $seat);
+$VERSION = '1.05';
+
+::ok( Testing->require_version(1.05),   'require_version()' );
+eval { Testing->require_version(1.11); 1 };
+::ok( $@,                               'require_version() fail' );
+::ok( Testing->require_version(0),      'require_version(0)' );
+
+sub lifejacket  { 'lifejacket'  }
+sub stuff       { 'stuff'       }
+sub Above       { 'Above'       }
+sub the         { 'the'         }
+sub Fasten      { 'Fasten'      }
+sub your        { 'your'        }
+sub under       { 'under'       }
+use vars qw($seatbelt $seat @wailing %left);
+$seatbelt = 'seatbelt';
+$seat     = 'seat';
+@wailing = qw(AHHHHHH);
+%left = ( left => "right" );
+
+
+Exporter::export_ok_tags;
+
+my %tags     = map { $_ => 1 } map { @$_ } values %EXPORT_TAGS;
+my %exportok = map { $_ => 1 } @EXPORT_OK;
+my $ok = 1;
+foreach my $tag (keys %tags) {
+    $ok = exists $exportok{$tag};
+}
+::ok( $ok, 'export_ok_tags()' );
+
+
+package Foo;
+Testing->import;
+
+::ok( defined &lifejacket,      'simple import' );
+
+
+package Bar;
+my @imports = qw($seatbelt &Above stuff @wailing %left);
+Testing->import(@imports);
+
+::ok( (!grep { eval "!defined $_" } map({ /^\w/ ? "&$_" : $_ } @imports)),
+      'import by symbols' );
+
+
+package Yar;
+my @tags = qw(:This :tray);
+Testing->import(@tags);
+
+::ok( (!grep { eval "!defined $_" } map { /^\w/ ? "&$_" : $_ }
+             map { @$_ } @{$Testing::EXPORT_TAGS{@tags}}),
+      'import by tags' );
+
+
+package Arrr;
+Testing->import(qw(!lifejacket));
+
+::ok( !defined &lifejacket,     'deny import by !' );
+
+
+package Mars;
+Testing->import('/e/');
+
+::ok( (!grep { eval "!defined $_" } map { /^\w/ ? "&$_" : $_ }
+            grep { /e/ } @Testing::EXPORT, @Testing::EXPORT_OK),
+      'import by regex');
+
+
+package Venus;
+Testing->import('!/e/');
+
+::ok( (!grep { eval "defined $_" } map { /^\w/ ? "&$_" : $_ }
+            grep { /e/ } @Testing::EXPORT, @Testing::EXPORT_OK),
+      'deny import by regex');
+::ok( !defined &lifejacket, 'further denial' );
+
+
+package More::Testing;
+@ISA = qw(Exporter);
+$VERSION = 0;
+eval { More::Testing->require_version(0); 1 };
+::ok(!$@,       'require_version(0) and $VERSION = 0');
+
+
+package Yet::More::Testing;
+@ISA = qw(Exporter);
+$VERSION = 0;
+eval { Yet::More::Testing->require_version(10); 1 };
+::ok($@ !~ /\(undef\)/,       'require_version(10) and $VERSION = 0');