Module: RSpec::Matchers::InstanceExec

Included in:
Matcher
Defined in:
lib/rspec/matchers/extensions/instance_exec.rb

Instance Method Summary collapse

Instance Method Details

#instance_exec(*args, &block) ⇒ Object

based on Bounded Spec InstanceExec (Mauricio Fernandez) eigenclass.org/hiki/bounded+space+instance_exec

  • uses singleton_class of matcher instead of global InstanceExecHelper module

  • this keeps it scoped to this class only, which is the only place we need it

  • only necessary for ruby 1.8.6



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# File 'lib/rspec/matchers/extensions/instance_exec.rb', line 12

def instance_exec(*args, &block)
  singleton_class = (class << self; self; end)
  begin
    orig_critical, Thread.critical = Thread.critical, true
    n = 0
    n += 1 while respond_to?(method_name="__instance_exec#{n}")
    singleton_class.module_eval{ define_method(method_name, &block) }
  ensure
    Thread.critical = orig_critical
  end
  begin
    return send(method_name, *args)
  ensure
    singleton_class.module_eval{ remove_method(method_name) } rescue nil
  end
end