// parseSettingsCompatible parses setting strings in a way that is
// compatible with the behavior before this CL based on the issue
// http://pad.lv/1194945. Until then setting an option to an empty
// string caused it to reset to the default value. We now allow
// empty strings as actual values, but we want to preserve the API
// behavior.
func parseSettingsCompatible(ch *state.Charm, settings map[string]string) (charm.Settings, error) {
setSettings := map[string]string{}
unsetSettings := charm.Settings{}
// Split settings into those which set and those which unset a value.
for name, value := range settings {
if value == "" {
unsetSettings[name] = nil
continue
}
setSettings[name] = value
}
// Validate the settings.
changes, err := ch.Config().ParseSettingsStrings(setSettings)
if err != nil {
return nil, err
}
// Validate the unsettings and merge them into the changes.
unsetSettings, err = ch.Config().ValidateSettings(unsetSettings)
if err != nil {
return nil, err
}
for name := range unsetSettings {
changes[name] = nil
}
return changes, nil
}
func assertCustomCharm(c *gc.C, ch *state.Charm, series string, meta *charm.Meta, config *charm.Config, revision int) {
// Check Charm interface method results.
c.Assert(ch.Meta(), gc.DeepEquals, meta)
c.Assert(ch.Config(), gc.DeepEquals, config)
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 BundleURL and BundleSHA256 methods, they're irrelevant.
}
func assertCharm(c *gc.C, bun charm.Bundle, sch *state.Charm) {
actual := bun.(*corecharm.Bundle)
c.Assert(actual.Revision(), gc.Equals, sch.Revision())
c.Assert(actual.Meta(), gc.DeepEquals, sch.Meta())
c.Assert(actual.Config(), gc.DeepEquals, sch.Config())
}