ruby stub_constant

# RSpec - Use stub_const to stub constants. 
# When the constant is already defined, the stubbed value will replace the original value for the duration of the example.

FOO = 7

describe "stubbing FOO" do
  it "can stub FOO with a different value" do
    stub_const("FOO", 5)
    FOO.should eq(5)
  end

  it "restores the stubbed constant when the example completes" do
    FOO.should eq(7)
  end
end