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7d733b9f0f
Pretty proud of this. We are testing distributed processes synchronized via pipes which makes it deterministic. Pretty cool. We boot a listener in the parent process we then fork. Before we touch the file we verify the fork is booted using pipes. Then the parent process will touch the file while the fork waits on a pipe. Once the parent process signals that the file has been touched we continue inside of the fork.
197 lines
4.7 KiB
Ruby
197 lines
4.7 KiB
Ruby
require 'abstract_unit'
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require 'pathname'
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require 'file_update_checker_shared_tests'
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class EventedFileUpdateCheckerTest < ActiveSupport::TestCase
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include FileUpdateCheckerSharedTests
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def setup
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skip if ENV['LISTEN'] == '0'
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super
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end
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def new_checker(files = [], dirs = {}, &block)
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ActiveSupport::EventedFileUpdateChecker.new(files, dirs, &block).tap do |c|
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wait
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end
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end
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def teardown
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super
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Listen.stop
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end
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def wait
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sleep 1
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end
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def touch(files)
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super
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wait # wait for the events to fire
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end
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def rm_f(files)
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super
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wait
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end
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test 'notifies forked processes' do
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FileUtils.touch(tmpfiles)
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checker = new_checker(tmpfiles) { }
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assert !checker.updated?
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# Pipes used for flow controll across fork.
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boot_reader, boot_writer = IO.pipe
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touch_reader, touch_writer = IO.pipe
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pid = fork do
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assert checker.updated?
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# Clear previous check value.
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checker.execute
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assert !checker.updated?
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# Fork is booted, ready for file to be touched
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# notify parent process.
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boot_writer.write("booted")
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# Wait for parent process to signal that file
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# has been touched.
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IO.select([touch_reader])
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assert checker.updated?
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end
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assert pid
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# Wait for fork to be booted before touching files.
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IO.select([boot_reader])
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touch(tmpfiles)
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# Notify fork that files have been touched.
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touch_writer.write("touched")
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assert checker.updated?
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Process.wait(pid)
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end
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end
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class EventedFileUpdateCheckerPathHelperTest < ActiveSupport::TestCase
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def pn(path)
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Pathname.new(path)
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end
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setup do
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@ph = ActiveSupport::EventedFileUpdateChecker::PathHelper.new
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end
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test '#xpath returns the expanded path as a Pathname object' do
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assert_equal pn(__FILE__).expand_path, @ph.xpath(__FILE__)
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end
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test '#normalize_extension returns a bare extension as is' do
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assert_equal 'rb', @ph.normalize_extension('rb')
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end
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test '#normalize_extension removes a leading dot' do
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assert_equal 'rb', @ph.normalize_extension('.rb')
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end
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test '#normalize_extension supports symbols' do
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assert_equal 'rb', @ph.normalize_extension(:rb)
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end
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test '#longest_common_subpath finds the longest common subpath, if there is one' do
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paths = %w(
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/foo/bar
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/foo/baz
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/foo/bar/baz/woo/zoo
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).map { |path| pn(path) }
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assert_equal pn('/foo'), @ph.longest_common_subpath(paths)
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end
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test '#longest_common_subpath returns the root directory as an edge case' do
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paths = %w(
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/foo/bar
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/foo/baz
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/foo/bar/baz/woo/zoo
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/wadus
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).map { |path| pn(path) }
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assert_equal pn('/'), @ph.longest_common_subpath(paths)
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end
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test '#longest_common_subpath returns nil for an empty collection' do
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assert_nil @ph.longest_common_subpath([])
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end
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test '#existing_parent returns the most specific existing ascendant' do
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wd = Pathname.getwd
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assert_equal wd, @ph.existing_parent(wd)
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assert_equal wd, @ph.existing_parent(wd.join('non-existing/directory'))
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assert_equal pn('/'), @ph.existing_parent(pn('/non-existing/directory'))
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end
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test '#filter_out_descendants returns the same collection if there are no descendants (empty)' do
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assert_equal [], @ph.filter_out_descendants([])
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end
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test '#filter_out_descendants returns the same collection if there are no descendants (one)' do
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assert_equal ['/foo'], @ph.filter_out_descendants(['/foo'])
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end
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test '#filter_out_descendants returns the same collection if there are no descendants (several)' do
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paths = %w(
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/Rails.root/app/controllers
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/Rails.root/app/models
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/Rails.root/app/helpers
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).map { |path| pn(path) }
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assert_equal paths, @ph.filter_out_descendants(paths)
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end
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test '#filter_out_descendants filters out descendants preserving order' do
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paths = %w(
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/Rails.root/app/controllers
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/Rails.root/app/controllers/concerns
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/Rails.root/app/models
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/Rails.root/app/models/concerns
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/Rails.root/app/helpers
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).map { |path| pn(path) }
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assert_equal paths.values_at(0, 2, 4), @ph.filter_out_descendants(paths)
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end
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test '#filter_out_descendants works on path units' do
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paths = %w(
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/foo/bar
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/foo/barrrr
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).map { |path| pn(path) }
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assert_equal paths, @ph.filter_out_descendants(paths)
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end
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test '#filter_out_descendants deals correctly with the root directory' do
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paths = %w(
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/
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/foo
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/foo/bar
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).map { |path| pn(path) }
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assert_equal paths.values_at(0), @ph.filter_out_descendants(paths)
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end
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test '#filter_out_descendants preserves duplicates' do
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paths = %w(
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/foo
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/foo/bar
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/foo
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).map { |path| pn(path) }
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assert_equal paths.values_at(0, 2), @ph.filter_out_descendants(paths)
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end
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end
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