func assertCustomCharm(c *gc.C, ch *state.Charm, series string, meta *charm.Meta, config *charm.Config, metrics *charm.Metrics, revision int) {
// Check Charm interface method results.
c.Assert(ch.Meta(), gc.DeepEquals, meta)
c.Assert(ch.Config(), gc.DeepEquals, config)
c.Assert(ch.Metrics(), gc.DeepEquals, metrics)
c.Assert(ch.Revision(), gc.DeepEquals, revision)
// Test URL matches charm and expected series.
url := ch.URL()
c.Assert(url.Series, gc.Equals, series)
c.Assert(url.Revision, gc.Equals, ch.Revision())
// Ignore the StoragePath and BundleSHA256 methods, they're irrelevant.
}
