bla_spec.rb

require File.expand_path(File.dirname(__FILE__) + '/../spec_helper')

class Bar
  def self.search(a, b = {})
  end
end

class Foo
  def self.call_bar_stuff
    @fish = Bar.search('fish', :limit => 3)
    @birds = Bar.search('birds', :limit => 4)
  end
end

describe Foo do
  before do
    Bar.stub!(:search)
  end

  it "should find no more than 3 fish" do
    Bar.should_receive(:search).with('fish', hash_including(:limit => 3))
    Foo.call_bar_stuff
  end

  it "should find no more than 4 birds" do
    Bar.should_receive(:search).with('birds', hash_including(:limit => 4))
    Foo.call_bar_stuff
  end
end