Bugfix: from_list_url(). (#5780)

This fixes a bug in from_list_url where it was referring to a method
which no longer exists. This also adds a test for the from_list_url
function.

var/spack/repos/builtin.mock/packages/url-list-test/package.py

@@ -0,0 +1,49 @@
+##############################################################################
+# Copyright (c) 2013-2017, Lawrence Livermore National Security, LLC.
+# Produced at the Lawrence Livermore National Laboratory.
+#
+# This file is part of Spack.
+# Created by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
+# LLNL-CODE-647188
+#
+# For details, see https://github.com/llnl/spack
+# Please also see the NOTICE and LICENSE files for our notice and the LGPL.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License (as
+# published by the Free Software Foundation) version 2.1, February 1999.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the terms and
+# conditions of the GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+##############################################################################
+from spack import *
+
+import os
+import spack
+
+
+class UrlListTest(Package):
+    """Mock package with url_list."""
+    homepage = "http://www.url-list-example.com"
+
+    web_data_path = os.path.join(spack.test_path, 'data', 'web')
+    url = 'file://' + web_data_path + '/foo-0.0.0.tar.gz'
+    list_url = 'file://' + web_data_path + '/index.html'
+    list_depth = 3
+
+    version('0.0.0')
+    version('1.0.0')
+    version('3.0')
+    version('4.5')
+    version('2.0.0b2')
+    version('3.0a1')
+    version('4.5-rc5')
+
+    def install(self, spec, prefix):
+        pass