func changeSettings(c *gc.C, ru *state.RelationUnit) {
node, err := ru.Settings()
c.Assert(err, gc.IsNil)
value, _ := node.Get("value")
v, _ := value.(int)
node.Set("value", v+1)
_, err = node.Write()
c.Assert(err, gc.IsNil)
}
func setSettings(c *gc.C, ru *state.RelationUnit, settings map[string]interface{}) {
node, err := ru.Settings()
c.Assert(err, gc.IsNil)
for _, k := range node.Keys() {
node.Delete(k)
}
node.Update(settings)
_, err = node.Write()
c.Assert(err, gc.IsNil)
}