If we M'Ex/also a module that isn't loaded, hint that to the user

diff --git a/Changes b/Changes
index 94c28a6..75d6a88 100644 (file)
--- a/Changes
+++ b/Changes
@@ -11,6 +11,10 @@ for, noteworthy changes.
         resilient in the face of global destruction's random garbage
         collection order.
 
+    * Moose::Exporter
+      - If you "also" a module that isn't loaded, the error message
+        now acknowledges that (Sartak)
+
 0.78 Tue, May 12, 2009
     * Moose::Cookbook::FAQ and Moose::Cookbook::WTF
       - Merged these documents into what is now Moose::Manual::FAQ

diff --git a/lib/Moose/Exporter.pm b/lib/Moose/Exporter.pm
index de058f1..375b2d8 100644 (file)
--- a/lib/Moose/Exporter.pm
+++ b/lib/Moose/Exporter.pm
@@ -76,8 +76,13 @@ sub build_import_methods {
     sub _follow_also_real {
         my $exporting_package = shift;
 
-        die "Package in also ($exporting_package) does not seem to use Moose::Exporter"
-            unless exists $EXPORT_SPEC{$exporting_package};
+        if (!exists $EXPORT_SPEC{$exporting_package}) {
+            my $loaded = Class::MOP::is_class_loaded($exporting_package);
+
+            die "Package in also ($exporting_package) does not seem to "
+              . "use Moose::Exporter"
+              . ($loaded ? "" : " (is it loaded?)");
+        }
 
         my $also = $EXPORT_SPEC{$exporting_package}{also};
 

diff --git a/t/050_metaclasses/012_moose_exporter.t b/t/050_metaclasses/012_moose_exporter.t
index f8d82a2..bb474fd 100644 (file)
--- a/t/050_metaclasses/012_moose_exporter.t
+++ b/t/050_metaclasses/012_moose_exporter.t
@@ -8,7 +8,7 @@ use Test::Exception;
 BEGIN {
     eval "use Test::Output;";
     plan skip_all => "Test::Output is required for this test" if $@;
-    plan tests => 45;
+    plan tests => 47;
 }
 
 
@@ -216,7 +216,7 @@ BEGIN {
 }
 
 {
-    package MooseX::CircularAlso;
+    package MooseX::NoAlso;
 
     use Moose ();
 
@@ -231,7 +231,28 @@ BEGIN {
 
     ::like(
         $@,
-        qr/\QPackage in also (NoSuchThing) does not seem to use Moose::Exporter/,
+        qr/\QPackage in also (NoSuchThing) does not seem to use Moose::Exporter (is it loaded?) at /,
+        'got the expected error from a reference in also to a package which is not loaded'
+    );
+}
+
+{
+    package MooseX::NotExporter;
+
+    use Moose ();
+
+    ::dies_ok(
+        sub {
+            Moose::Exporter->setup_import_methods(
+                also => [ 'Moose::Meta::Method' ],
+            );
+        },
+        'a package which does not use Moose::Exporter in also dies with an error'
+    );
+
+    ::like(
+        $@,
+        qr/\QPackage in also (Moose::Meta::Method) does not seem to use Moose::Exporter at /,
         'got the expected error from a reference in also to a package which does not use Moose::Exporter'
     );
 }