Run tests for all changed app, lib and test files

rtt

#!/usr/bin/env ruby
# Run unit test for all added or changed app, lib and test files.
# Ex:
# * `rtt` will run tests for all files changed since the last commit
# * `rtt master` will run tests for all files different from master

if ARGV[0]
  files = `git diff --name-only $(git merge-base HEAD #{ARGV[0]})..$(git rev-parse --abbrev-ref HEAD)`.split("\n")
else
  files = `git status -s`.split("\n").map { |f| f.split(' ').last }
end

files += files.select { |f| f[/\/\z/] }.map { |dir| Dir["#{dir}**/*.rb"] }.flatten

test_files = files.select { |f| f["test/"] }
app_files = files.select { |f| f["app/"] }
lib_files = files.select { |f| f["lib/"] }

guessed_test_files = app_files.map { |f| f.gsub('app/', 'test/').gsub('.rb', '_test.rb') }
guessed_test_files += lib_files.map { |f| f.gsub('lib/', 'test/lib/').gsub('.rb', '_test.rb') }

all_test_files = test_files + guessed_test_files

existing_test_files = all_test_files.uniq.select { |f| f[/_test.rb\z/] }.select { |f| File.exists?(f) }

if existing_test_files.empty?
  puts "No tests to run..."
  exit 0
end

puts "Running tests:"
existing_test_files.each do |f|
  puts "  - #{f}"
end

puts ""

cmd = (['bin/rails test'] + existing_test_files).join(' ')

puts cmd

system "zsh -c '#{cmd}'"