```ruby
$LOAD_PATH.unshift File.expand_path('../../lib', __FILE__)
require 'brew/gem'

if RUBY_VERSION < '1.9.3'
  ::Dir.glob(::File.expand_path('../support/*.rb', __FILE__)).each { |f| require File.join(File.dirname(f), File.basename(f, '.rb')) }
  ::Dir.glob(::File.expand_path('../support/**/*.rb', __FILE__)).each { |f| require File.join(File.dirname(f), File.basename(f, '.rb')) }
else
  ::Dir.glob(::File.expand_path('../support/*.rb', __FILE__)).each { |f| require_relative f }
  ::Dir.glob(::File.expand_path('../support/**/*.rb', __FILE__)).each { |f| require_relative f }
end
```

Exclude integration test when `brew` command not found
user
```ruby
$LOAD_PATH.unshift File.expand_path('../../lib', __FILE__)
require 'brew/gem'

if RUBY_VERSION < '1.9.3'
  ::Dir.glob(::File.expand_path('../support/*.rb', __FILE__)).each { |f| require File.join(File.dirname(f), File.basename(f, '.rb')) }
  ::Dir.glob(::File.expand_path('../support/**/*.rb', __FILE__)).each { |f| require File.join(File.dirname(f), File.basename(f, '.rb')) }
else
  ::Dir.glob(::File.expand_path('../support/*.rb', __FILE__)).each { |f| require_relative f }
  ::Dir.glob(::File.expand_path('../support/**/*.rb', __FILE__)).each { |f| require_relative f }
end

RSpec.configure do |c|
  c.filter_run focus: true
  c.run_all_when_everything_filtered = true
  unless system('which brew > /dev/null')
    c.filter_run_excluding integration: true
  end
end
```
assistant