RSpec - Ruby testing (stand alone example / no cucumber)

Archive - Originally posted on "The Horse's Mouth" - 2015-10-17 12:46:05 - Graham Ellis
RSpec can be used as a stand alone test environment for your Ruby program, as well as being used within Gherkin and Cucumber (see [here] for some details of that).

Installation as a Ruby Gem (you may need admin permissions):
gem install rspec

Run your program under the new executable rspec ... on Linux / Unix / OS X start your file with
#!/usr/bin/env rspec

Load the code to be tested - perhaps this class

  class StringChanger

    def reverse_and_save(string_to_reverse)

      string_to_reverse.reverse

    end

  end

and describe the test

  describe StringChanger do

    it 'reverses strings' do

      string_changer = StringChanger.new

      reversed_string = string_changer.reverse_and_save('example from Well House')

      expect(reversed_string).to eq 'esuoH lleW morf elpmaxe'

      end

  end

run it

  WomanWithCat:rspec grahamellis$ ./rs001

  .

  

  Finished in 0.00073 seconds (files took 0.09143 seconds to load)

  1 example, 0 failures

  

  WomanWithCat:rspec grahamellis$

and see that the tests have passed.

Next lessons - multiple tests, what happens when a test fails, other tests ...

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RSpec - Ruby testing (stand alone example / no cucumber)