class Object

Object extensions for Minitest::Mock.

Public Instance Methods

stub(name, val_or_callable, *block_args) { |self| ... } click to toggle source

Add a temporary stubbed method replacing name for the duration of the block. If val_or_callable responds to call, then it returns the result of calling it, otherwise returns the value as-is. If stubbed method yields a block, block_args will be passed along. Cleans up the stub at the end of the block. The method name must exist before stubbing.

def test_stale_eh
  obj_under_test = Something.new
  refute obj_under_test.stale?

  Time.stub :now, Time.at(0) do
    assert obj_under_test.stale?
  end
end

Calls superclass method

# File minitest-5.15.0/lib/minitest/mock.rb, line 214
def stub name, val_or_callable, *block_args
  new_name = "__minitest_stub__#{name}"

  metaclass = class << self; self; end

  if respond_to? name and not methods.map(&:to_s).include? name.to_s then
    metaclass.send :define_method, name do |*args|
      super(*args)
    end
  end

  metaclass.send :alias_method, new_name, name

  metaclass.send :define_method, name do |*args, &blk|
    if val_or_callable.respond_to? :call then
      val_or_callable.call(*args, &blk)
    else
      blk.call(*block_args) if blk
      val_or_callable
    end
  end

  metaclass.send(:ruby2_keywords, name) if metaclass.respond_to?(:ruby2_keywords, true)

  yield self
ensure
  metaclass.send :undef_method, name
  metaclass.send :alias_method, name, new_name
  metaclass.send :undef_method, new_name
end