.ruby-template.rb

# Gems we've talked about in class, but which have absolutely nothing to do
# with setting up spec-style testing.
# Included here for convenience.
gem_group :development do
  # Improve the error message you get in the browser
  gem 'better_errors'

  # Use pry for rails console
  gem 'pry-rails'
end

gem 'awesome_print'
gem 'foundation-rails'

# Add some extra minitest support
gem_group :test do
  gem 'minitest-rails'
  gem 'minitest-reporters'
end

# Add some code to some files to support spec-style testing
# For these injections, indentation matters!
inject_into_file 'config/application.rb', after: "class Application < Rails::Application\n" do
  <<-'RUBY'
    # Force new test files to be generated in the minitest-spec style
    config.generators do |g|
      g.test_framework :minitest, spec: true
    end
  RUBY
end

# Things to do after all the gems have been installed
after_bundle do
  # Run rails generate minitest:install
  generate "minitest:install", "--force"
  # Run rails generate foundation:install
  generate "foundation:install", "--force"

  # Add minitest reporters support. This must be run after
  # rails generate minitest:install, because that command
  # changes test/test_helper.rb
  inject_into_file 'test/test_helper.rb', after: 'require "minitest/rails"' do
    <<-'RUBY'

require "minitest/reporters"  # for Colorized output

#  For colorful output!
Minitest::Reporters.use!(
  Minitest::Reporters::SpecReporter.new,
  ENV,
  Minitest.backtrace_filter
)
    RUBY
  end

  # Add Foundation Javascript with Motion-ui this must be run after
  # rails generate foundation:install, because that command
  # adds foundation_and_overrides.scss
  inject_into_file 'app/assets/stylesheets/foundation_and_overrides.scss', after: '// @include motion-ui-animations;' do
    <<-'RUBY'

@import 'motion-ui/motion-ui';
@include motion-ui-transitions;
@include motion-ui-animations;

    RUBY
  end
end

Looks like you're missing the binding_of_caller gem.