Project: RSpec Mocks 2.12

Publisher: RSpec

Argument matchers

Introduction

Argument matchers can be used:

In stubs to constrain the scope of the stubbed method

obj.stub(:foo).with(:bar) do |arg|
#do something for :bar
end
obj.stub(:foo).with(:baz) do |arg|
#do something for :baz
end
In expectations to validate the arguments that should be received in a method call

#create a double
obj = double()

#expect a message with given args
obj.should_receive(:message).with('an argument')

If more control is needed, one can use a block

obj.should_receive(:message) do |arg1,  arg2|
  # set expectations about the args in this block
  # and optionally set a return value
end

Topics

Last published almost 5 years ago by alindeman.