[RUBY] Learn RSpec with Everyday Rails. Until you bundle install the sample app.

Recognizing the importance of test code, I started learning RSpec on everyday rails. It took a while to install bundle I will make an article.

First, git clone from git hub. And bundle install. Can not.

nokogiri error. Solved by changing the environment variable in source ~/.bash_profile.

gem ffi cannot be installed.

After deleting Gemflie.lock, bundle install solves it!

Hooray!

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