Dropping `bundle exec guard` to speed up the test feedback loop

console.md

With bundle exec:

$ bundle exec guard
[resave spec_fast/models/user_spec.rb]
Run options: --seed 25736
Started

User
   SKIP test_0001_works (0.00s)

Finished in 0.00282s
1 tests, 0 assertions, 0 failures, 0 errors, 1 skips
ruby spec_fast/models/user_spec.rb (1.33792 seconds)

Without bundle exec:

$ guard
[resave spec_fast/models/user_spec.rb]
Run options: --seed 59910
Started

User
   SKIP test_0001_works (0.00s)

Finished in 0.00153s
1 tests, 0 assertions, 0 failures, 0 errors, 1 skips
ruby spec_fast/models/user_spec.rb (0.453997 seconds)

Gemfile

gem 'guard-shell'
gem 'minitest-reporters'

Guardfile

require 'benchmark'

guard 'shell' do
  run = lambda do |file|
    cmd = "ruby #{file}"
    secs = Benchmark.realtime { system(cmd) }
    puts "#{cmd} (#{secs} seconds)"
  end
  watch(%r{^spec_fast/.+_spec\.rb$}) {|m| run.(m[0]) }
end

spec_helper.rb

# spec_fast/spec_helper.rb

require 'minitest/autorun'
require 'pp'

require 'minitest/reporters'
MiniTest::Unit.runner = MiniTest::SuiteRunner.new
MiniTest::Unit.runner.reporters << MiniTest::Reporters::SpecReporter.new

user.rb

# app/models/user.rb

class User
  # nothing to see here
end

user_spec.rb

# spec_fast/models/user_spec.rb

require_relative '../spec_helper'
require_relative '../../app/models/user'

describe User do
  it "works"
end