How to implement busy spinner with button

What should happen when a user clicks on a button that triggers an action that takes a short amount of time to complete, showing a busy spinner to indicate processing?

• [click] => [click] - Mouse cursor changes to system busy spinner cursor
• [click] => - Busy spinner replaces button entirely
• [click] => [ ] - Busy spinner replaces button text
• [click] => [click ] - Busy spinner appears inside button
• [click] => [click] - Busy spinner appears outside button
• [click] => [ please wait...] - Busy spinner replaces button text, accompanied by text
• [click] => please wait... - Busy spinner replaces button entirely, accompanied by text

Which one of the above solutions is the most user-friendly?