Module: Slack::Mixins::Speck::Check

Defined in:

lib/slack/mixins/speck/check.rb

Instance Method Summary

• #! ⇒ Object

  This method can “invert” a ‘Check` object, such that it treats success of the original check block (a truthy return value) as failure (a false return value), and vice versa.

Instance Method Details

#! ⇒ Object

This method can “invert” a ‘Check` object, such that it treats success of the original check block (a truthy return value) as failure (a false return value), and vice versa.

This simply wraps the existing block in a new block that calls and inverts the return value.

# File 'lib/slack/mixins/speck/check.rb', line 13

def !
  old_expectation, @expectation = @expectation, ->{
    b = old_expectation.arity == 0 ?
      ->{old_expectation.call} :
      ->{old_expectation[@target.call]}
    @status = b.call ? false : true
  }
  return self
end