Update POD for Vendor.

Add a basic Vendor test.

t/Shop/Vendor.t

@@ -0,0 +1,74 @@
+# vim:syntax=perl
+#-------------------------------------------------------------------
+# WebGUI is Copyright 2001-2008 Plain Black Corporation.
+#-------------------------------------------------------------------
+# Please read the legal notices (docs/legal.txt) and the license
+# (docs/license.txt) that came with this distribution before using
+# this software.
+#------------------------------------------------------------------
+# http://www.plainblack.com                     info@plainblack.com
+#------------------------------------------------------------------
+
+# Write a little about what this script tests.
+# 
+#
+
+use FindBin;
+use strict;
+use lib "$FindBin::Bin/../lib";
+use Test::More;
+use Test::Deep;
+use JSON;
+use HTML::Form;
+
+use WebGUI::Test; # Must use this before any other WebGUI modules
+use WebGUI::Session;
+
+#----------------------------------------------------------------------------
+# Init
+my $session         = WebGUI::Test->session;
+
+#----------------------------------------------------------------------------
+# Tests
+
+my $tests = 2;
+plan tests => 1 + $tests;
+
+#----------------------------------------------------------------------------
+# put your tests here
+
+my $loaded = use_ok('WebGUI::Shop::Vendor');
+
+my $vendor;
+
+SKIP: {
+
+skip 'Unable to load module WebGUI::Shop::Vendor', $tests unless $loaded;
+
+#######################################################################
+#
+# new
+#
+#######################################################################
+
+my $e;
+
+eval { $vendor = WebGUI::Shop::Vendor->new(); };
+$e = Exception::Class->caught();
+isa_ok($e, 'WebGUI::Error::InvalidObject', 'new takes an exception to not giving it a session variable');
+cmp_deeply(
+    $e,
+    methods(
+        error => 'Need a session.',
+        got   => '',
+        expected => 'WebGUI::Session',
+    ),
+    'new: requires a session variable',
+);
+
+}
+
+#----------------------------------------------------------------------------
+# Cleanup
+END {
+}