Automated Tests with Guard

One annoyance associated with using the rspec command is having to switch to the command line and run the tests by hand. (A second annoyance, the slow start-up time of the test suite, is addressed in Section 3.6.3.) In this section, we’ll show how to use Guard to automate the running of the tests. Guard monitors changes in the filesystem so that, for example, when we change the static_pages_spec.rb file only those test get run. Even better, we can configure Guard so that when, say, the home.html.erb file is modified, the static_pages_spec.rb automatically runs. First we add guard-rspec to the Gemfile (Listing 3.33).