Add invariant to stack example

jimweirich · Aug 28, 2012 · 4606988 · 4606988
1 parent 04d3a7a
commit 4606988
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/examples/stack/stack_spec.rb b/examples/stack/stack_spec.rb
@@ -10,6 +10,7 @@ def stack_with(initial_contents)
   end
 
   Given(:stack) { stack_with(initial_contents) }
+  Invariant { stack.empty?.should == (stack.depth == 0) }
 
   context "when empty" do
     Given(:initial_contents) { [] }