Run iOS unit tests (in a Xcode workspace) when a file changes and *only* those tests related to the changed file. Also trims otest output and colors test results.

Instructions.md

Instructions

Enable ‘Run’ in the ‘Build’ section of your test bundle’s scheme. (See http://www.raingrove.com/2012/03/28/running-ocunit-and-specta-tests-from-command-line.html)

Install the Kicker tool and the dependencies

$ gem install kicker open4 colored xcodebuild-rb

Install the .kick example file and the otest wrapper

$ curl https://raw.github.com/gist/3011214/8f660de3ef091770290660680e7c195052b3b0e0/kick.rb > .kick
$ curl https://raw.github.com/gist/3011214/b1dd39b5509a87e16c691177926eced004fa2d14/run-tests.rb > run-tests
$ chmod +x run-tests

Update the files for your application’s requirements

$ edit .kick
$ edit run-tests

Finally, start Kicker

$ kicker -c

And an example of the output:

21:04:55.90 | Executing: xcodebuild -sdk iphonesimulator -workspace AppName.xcworkspace -scheme AppUnitTests build

Building target: AppUnitTests (in AppName.xcproject)
====================================================

Configuration: Debug
................................

Finished in 2.041412 seconds.
Build succeeded.

21:04:59.47 | Success
21:04:59.47 | Executing: ./run-tests AppPostsSyncSpec

2012-07-05 21:05:02.204 otest[8715:7803] + 'AppPostsSyncSpec synchronizes remote Posts with the local DB' [PASSED]
Executed 1 test, with 0 failures (0 unexpected) in 2.188 (2.213) seconds

21:05:02.21 | Success

kick.rb

require 'rubygems'
require 'xcodebuild'

def xcodebuild
  formatter     = XcodeBuild::Formatters::ProgressFormatter.new
  reporter      = XcodeBuild::Reporter.new(formatter)
  output_buffer = XcodeBuild::OutputTranslator.new(reporter)
  arguments     = "-sdk iphonesimulator -workspace AppName.xcworkspace -scheme AppUnitTests build"

  perform_work("xcodebuild #{arguments}") do |status|
    status.exit_code = XcodeBuild.run(arguments, output_buffer)
  end
end

def run_tests(tests)
  if xcodebuild.success?
    execute "./run-tests #{tests.join(' ')}"
  end
end

recipe :ignore
ignore /DerivedData/
ignore /\.(xcodeproj|xcworkspace)/
ignore /\.sw\w$/ # vim swap files

# Adapt this `process` block for your application's specific requirements.
process do |files|
  tests = files.take_and_map do |file|
    case file
    # a changed test file should always run
    when %r{Test/}
      file
    # runs *all* sync tests when any of the base classes change
    when %r{Classes/Sync/Base Classes}
      Dir.glob("Test/Sync/*.m")
    # runs only the sync test that maps to the changed file
    when %r{Classes/Sync/App(\w+)Sync\.(h|m)$}
      Dir.glob("Test/Sync/App#{$1}SyncSpec.m")
    end
  end
  run_tests(tests.map { |m| File.basename(m, '.m') }) unless tests.empty?
end

run-tests.rb

#!/usr/bin/env ruby

require 'rubygems'
require 'open4'
require 'colored'
require 'pathname'

class OTestOutput < Array
  def initialize(io, verbose, source_root)
    @io, @verbose, @source_root = io, verbose, Pathname.new(source_root)
  end

  def <<(line)
    return if !@verbose && line =~ /^Test (Case|Suite)/
    super
    @io << case line
    when /\[PASSED\]/
      line.green
    when /\[PENDING\]/
      line.yellow
    when /^(.+?\.m)(:\d+:\s.+?\[FAILED\].+)/m
      # shorten the path to the test file to be relative to the source root
      if $1 == 'Unknown.m'
        line.red
      else
        (Pathname.new($1).relative_path_from(@source_root).to_s + $2).red
      end
    else
      line
    end
    self
  end
end

product_name     = 'AppName'
test_bundle_name = 'AppUnitTests'

source_root        = File.expand_path('../..', __FILE__)
derived_data_root  = File.join(source_root, 'DerivedData')
built_products_dir = File.join(derived_data_root, product_name, 'Build/Products/Debug-iphonesimulator')
dev_root           = '/Applications/Xcode.app/Contents/Developer'
sdk_root           = File.join(dev_root, 'Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.1.sdk')

ENV['DYLD_FRAMEWORK_PATH']           = "#{built_products_dir}:#{File.join(sdk_root, 'Applications/Xcode.app/Contents/Developer/Library/Frameworks')}"
ENV['DYLD_LIBRARY_PATH']             = built_products_dir
ENV['DYLD_NEW_LOCAL_SHARED_REGIONS'] = 'YES'
ENV['DYLD_NO_FIX_PREBINDING']        = 'YES'
ENV['DYLD_ROOT_PATH']                = sdk_root
ENV['IPHONE_SIMULATOR_ROOT']         = sdk_root
ENV['CFFIXED_USER_HOME']             = File.expand_path('~/Library/Application Support/iPhone Simulator/')

verbose = !!ARGV.delete('--verbose')
test_suites = ARGV.empty? ? 'All' : ARGV.uniq.join(',')

command = "#{File.join(sdk_root, 'Developer/usr/bin/otest')} -SenTest #{test_suites} #{File.join(built_products_dir, "#{test_bundle_name}.octest")}"
# otest only seems to use stderr, but let's be safe
stdout, stderr = OTestOutput.new(STDOUT, verbose, source_root), OTestOutput.new(STDERR, verbose, source_root)
status = Open4.spawn(command, :stdout => stdout, :stderr => stderr, :status => true)
exit status.exitstatus