First Step for creating RSpec.
require 'rspec/autorun' describe Order do # ... end
Describe the block used to group all test cases and specify which class is testing.
Next, it block is a test case name that was written in describe block.
describe Order do it "does something" do # ... end end
Test case Example
describe Sum do it "Sum of two numbers" do sum = Sum.new expected(sum.add(10,10)).to eq(10) end end
Before creating the above test case you need to create Sum class and add method with two arguments.