func assertToolsList(c *gc.C, list coretools.List, expected []version.Binary) {
urls := list.URLs()
c.Check(urls, gc.HasLen, len(expected))
for _, vers := range expected {
c.Assert(urls[vers], gc.Not(gc.Equals), "")
}
}
func (s *ListSuite) TestURLs(c *gc.C) {
empty := tools.List{}
c.Check(empty.URLs(), gc.DeepEquals, map[version.Binary]string{})
full := tools.List{t100precise, t190quantal, t2001precise}
c.Check(full.URLs(), gc.DeepEquals, map[version.Binary]string{
t100precise.Version: t100precise.URL,
t190quantal.Version: t190quantal.URL,
t2001precise.Version: t2001precise.URL,
})
}