require 'fileutils' module FileUpdateCheckerSharedTests extend ActiveSupport::Testing::Declarative include FileUtils def tmpdir @tmpdir ||= Dir.mktmpdir(nil, __dir__) end def tmpfile(name) "#{tmpdir}/#{name}" end def tmpfiles @tmpfiles ||= %w(foo.rb bar.rb baz.rb).map { |f| tmpfile(f) } end def teardown FileUtils.rm_rf(@tmpdir) if defined? @tmpdir end test 'should not execute the block if no paths are given' do silence_warnings { require 'listen' } i = 0 checker = new_checker { i += 1 } assert !checker.execute_if_updated assert_equal 0, i end test 'should not execute the block if no files change' do i = 0 FileUtils.touch(tmpfiles) checker = new_checker(tmpfiles) { i += 1 } assert !checker.execute_if_updated assert_equal 0, i end test 'should execute the block once when files are created' do i = 0 checker = new_checker(tmpfiles) { i += 1 } touch(tmpfiles) assert checker.execute_if_updated assert_equal 1, i end test 'should execute the block once when files are modified' do i = 0 FileUtils.touch(tmpfiles) checker = new_checker(tmpfiles) { i += 1 } touch(tmpfiles) assert checker.execute_if_updated assert_equal 1, i end test 'should execute the block once when files are deleted' do i = 0 FileUtils.touch(tmpfiles) checker = new_checker(tmpfiles) { i += 1 } rm_f(tmpfiles) assert checker.execute_if_updated assert_equal 1, i end test 'updated should become true when watched files are created' do i = 0 checker = new_checker(tmpfiles) { i += 1 } assert !checker.updated? touch(tmpfiles) assert checker.updated? end test 'updated should become true when watched files are modified' do i = 0 FileUtils.touch(tmpfiles) checker = new_checker(tmpfiles) { i += 1 } assert !checker.updated? touch(tmpfiles) assert checker.updated? end test 'updated should become true when watched files are deleted' do i = 0 FileUtils.touch(tmpfiles) checker = new_checker(tmpfiles) { i += 1 } assert !checker.updated? rm_f(tmpfiles) assert checker.updated? end test 'should be robust to handle files with wrong modified time' do i = 0 FileUtils.touch(tmpfiles) now = Time.now time = Time.mktime(now.year + 1, now.month, now.day) # wrong mtime from the future File.utime(time, time, tmpfiles[0]) checker = new_checker(tmpfiles) { i += 1 } touch(tmpfiles[1..-1]) assert checker.execute_if_updated assert_equal 1, i end test 'should cache updated result until execute' do i = 0 checker = new_checker(tmpfiles) { i += 1 } assert !checker.updated? touch(tmpfiles) assert checker.updated? checker.execute assert !checker.updated? end test 'should execute the block if files change in a watched directory one extension' do i = 0 checker = new_checker([], tmpdir => :rb) { i += 1 } touch(tmpfile('foo.rb')) assert checker.execute_if_updated assert_equal 1, i end test 'should execute the block if files change in a watched directory several extensions' do i = 0 checker = new_checker([], tmpdir => [:rb, :txt]) { i += 1 } touch(tmpfile('foo.rb')) assert checker.execute_if_updated assert_equal 1, i touch(tmpfile('foo.txt')) assert checker.execute_if_updated assert_equal 2, i end test 'should not execute the block if the file extension is not watched' do i = 0 checker = new_checker([], tmpdir => :txt) { i += 1 } touch(tmpfile('foo.rb')) assert !checker.execute_if_updated assert_equal 0, i end test 'does not assume files exist on instantiation' do i = 0 non_existing = tmpfile('non_existing.rb') checker = new_checker([non_existing]) { i += 1 } touch(non_existing) assert checker.execute_if_updated assert_equal 1, i end test 'detects files in new subdirectories' do i = 0 checker = new_checker([], tmpdir => :rb) { i += 1 } subdir = tmpfile('subdir') mkdir(subdir) wait assert !checker.execute_if_updated assert_equal 0, i touch("#{subdir}/nested.rb") assert checker.execute_if_updated assert_equal 1, i end test 'looked up extensions are inherited in subdirectories not listening to them' do i = 0 subdir = tmpfile('subdir') mkdir(subdir) checker = new_checker([], tmpdir => :rb, subdir => :txt) { i += 1 } touch(tmpfile('new.txt')) assert !checker.execute_if_updated assert_equal 0, i # subdir does not look for Ruby files, but its parent tmpdir does. touch("#{subdir}/nested.rb") assert checker.execute_if_updated assert_equal 1, i touch("#{subdir}/nested.txt") assert checker.execute_if_updated assert_equal 2, i end end