## normal.rb

class Base
  def foo; 1 end
end

describe Base do
  it "should work" { Base.new.foo.should == 1 }
end

class Derived
  def bar
    foo + 1
  end
end

describe Derived do
  it "should work" { Derived.new.bar.should == 2 }
end

## database.rb

class Base
  def foo; SQL['SELECT id FROM table'].to_i end
end

describe Base do
  before { @base = Base.new; @base.stub!(:SQL).returns(1) } # not actually valid, i know
  it "should work" { @base.foo.should == 1 }
end

class Derived
  def bar
    foo + 1
  end
end

describe Derived do
  it "should work" { Derived.new.bar.should == 2 }
end