STEP 1 GemFile Step one gem install bundler Run bundler to make Gemfile.lock

Step 2 RSPEC --init

Step 3 Write spec test for Card and then

Step 4 Write a test a ensure that card can store a balance of zero

Step 5 Create a test for top_up watch it fail and then pass and argument to top_up that adds to balance

step 6 Made a test to see if could go over limit