Function fail::cfg

pub fn cfg<S: Into<String>>(name: S, actions: &str) -> Result<(), String>

Set new actions to a fail point at runtime.

The format of actions is action[->action...]. When multiple actions are specified, an action will be checked only when its former action is not triggered.

The format of an action is [p%][cnt*]task[(arg)]. p% is the expected probability that the action is triggered, and cnt* is the max times the action can be triggered. Supported task includes:

• off, the fail point will do nothing.
• return(arg), return early when the fail point is triggered. arg is passed to $e ( defined via the fail_point! macro) as a string.
• sleep(milliseconds), sleep for the specified time.
• panic(msg), panic with the message.
• print(msg), print the message.
• pause, sleep until other action is set to the fail point.
• yield, yield the CPU.
• delay(milliseconds), busy waiting for the specified time.

For example, 20%3*print(still alive!)->panic means the fail point has 20% chance to print a message "still alive!" and 80% chance to panic. And the message will be printed at most 3 times.