this_should_fail.rb

class Dependency
  def self.foo
    puts "Foo"
  end

  def self.bar
    puts "Bar"
  end
end

class ClassUnderTest
  def self.go
    Dependency.foo
    Dependency.bar
  end
end

describe ClassUnderTest do
  it "should call dependencies" do
    # This script prints "Bar" and passes.
    # I want it to explode because calling Dependency.bar was not mocked out.
    # i.e. I don't want to accidentally call a real method on the dependency.
    # The only way I can see to do this is to add the following line, but that sucks:
    #
    # Dependency = mock

    Dependency.should_receive(:foo)
    ClassUnderTest.go
  end
end