remove_other_xcode_test_target_files_from_target.rb

require 'Slop'
require 'Xcodeproj'

DEFAULT_PROJECT_FILE = 'Foo/Bar.xcodeproj'

opts = Slop.parse do |o|
  o.string '-t', '--target', 'the name of the test target from which you want to remove all other spec files'
  o.array '-k', '--keep', 'either a single file, or a comma-separated list of files that you want to keep in the test target; all other files matching /Spec.m$/ will be removed; note that you can submit --keep a.m --keep b.m, if you don\'t want to use a comma-separated list', delimiter: ','
  o.string '-p', '--project', "the project file containing the test target you want to modify; default is #{DEFAULT_PROJECT_FILE}", default: DEFAULT_PROJECT_FILE
  o.on '-h', '--help', 'print this help message' do
    puts o
    exit
  end
end

project_path = opts[:project]
test_target = opts[:target]
test_files_to_keep = opts[:keep]

project = Xcodeproj::Project.open(project_path)
kif_tests_1 = project.targets.find { |target| target.name == test_target }
compile_sources_build_phase = kif_tests_1.build_phases.find { |phase| phase.is_a? Xcodeproj::Project::Object::PBXSourcesBuildPhase }

build_files_to_remove = compile_sources_build_phase.files.select do |build_file|
  build_file.display_name.end_with?('Spec.m') && !test_files_to_keep.include?(build_file.display_name)
end

build_files_to_remove.each { |build_file| compile_sources_build_phase.remove_build_file build_file }

project.save

Requires the Xcodeproj gem to be installed.

Also requires the Slop gem.