require 'abstract_unit' require 'fileutils' class FixtureTemplate attr_reader :source, :handler def initialize(template_path) @source = File.read(template_path) @handler = ActionView::Template.handler_for_extension(:erb) rescue Errno::ENOENT raise ActionView::MissingTemplate.new([], "", [], true, []) end end class FixtureFinder FIXTURES_DIR = "#{File.dirname(__FILE__)}/../fixtures/digestor" attr_reader :details def initialize @details = {} end def details_key details.hash end def find(logical_name, keys, partial, options) FixtureTemplate.new("digestor/#{partial ? logical_name.gsub(%r|/([^/]+)$|, '/_\1') : logical_name}.#{options[:formats].first}.erb") end end class TemplateDigestorTest < ActionView::TestCase def setup @cwd = Dir.pwd @tmp_dir = Dir.mktmpdir FileUtils.cp_r FixtureFinder::FIXTURES_DIR, @tmp_dir Dir.chdir @tmp_dir end def teardown Dir.chdir @cwd FileUtils.rm_r @tmp_dir ActionView::Digestor.cache.clear end def test_top_level_change_reflected assert_digest_difference("messages/show") do change_template("messages/show") end end def test_explicit_dependency assert_digest_difference("messages/show") do change_template("messages/_message") end end def test_explicit_dependency_in_multiline_erb_tag assert_digest_difference("messages/show") do change_template("messages/_form") end end def test_second_level_dependency assert_digest_difference("messages/show") do change_template("comments/_comments") end end def test_second_level_dependency_within_same_directory assert_digest_difference("messages/show") do change_template("messages/_header") end end def test_third_level_dependency assert_digest_difference("messages/show") do change_template("comments/_comment") end end def test_directory_depth_dependency assert_digest_difference("level/below/index") do change_template("level/below/_header") end end def test_logging_of_missing_template assert_logged "Couldn't find template for digesting: messages/something_missing.html" do digest("messages/show") end end def test_logging_of_missing_template_ending_with_number assert_logged "Couldn't find template for digesting: messages/something_missing_1.html" do digest("messages/show") end end def test_nested_template_directory assert_digest_difference("messages/show") do change_template("messages/actions/_move") end end def test_recursion_in_renders assert digest("level/recursion") # assert recursion is possible assert_not_nil digest("level/recursion") # assert digest is stored end def test_chaining_the_top_template_on_recursion assert digest("level/recursion") # assert recursion is possible assert_digest_difference("level/recursion") do change_template("level/recursion") end assert_not_nil digest("level/recursion") # assert digest is stored end def test_chaining_the_partial_template_on_recursion assert digest("level/recursion") # assert recursion is possible assert_digest_difference("level/recursion") do change_template("level/_recursion") end assert_not_nil digest("level/recursion") # assert digest is stored end def test_dont_generate_a_digest_for_missing_templates assert_equal '', digest("nothing/there") end def test_collection_dependency assert_digest_difference("messages/index") do change_template("messages/_message") end assert_digest_difference("messages/index") do change_template("events/_event") end end def test_collection_derived_from_record_dependency assert_digest_difference("messages/show") do change_template("events/_event") end end def test_details_are_included_in_cache_key # Cache the template digest. old_digest = digest("events/_event") # Change the template; the cached digest remains unchanged. change_template("events/_event") # The details are changed, so a new cache key is generated. finder.details[:foo] = "bar" # The cache is busted. assert_not_equal old_digest, digest("events/_event") end def test_extra_whitespace_in_render_partial assert_digest_difference("messages/edit") do change_template("messages/_form") end end def test_extra_whitespace_in_render_named_partial assert_digest_difference("messages/edit") do change_template("messages/_header") end end def test_extra_whitespace_in_render_record assert_digest_difference("messages/edit") do change_template("messages/_message") end end def test_extra_whitespace_in_render_with_parenthesis assert_digest_difference("messages/edit") do change_template("events/_event") end end def test_old_style_hash_in_render_invocation assert_digest_difference("messages/edit") do change_template("comments/_comment") end end def test_dependencies_via_options_results_in_different_digest digest_plain = digest("comments/_comment") digest_fridge = digest("comments/_comment", dependencies: ["fridge"]) digest_phone = digest("comments/_comment", dependencies: ["phone"]) digest_fridge_phone = digest("comments/_comment", dependencies: ["fridge", "phone"]) assert_not_equal digest_plain, digest_fridge assert_not_equal digest_plain, digest_phone assert_not_equal digest_plain, digest_fridge_phone assert_not_equal digest_fridge, digest_phone assert_not_equal digest_fridge, digest_fridge_phone assert_not_equal digest_phone, digest_fridge_phone end def test_cache_template_loading resolver_before = ActionView::Resolver.caching ActionView::Resolver.caching = false assert_digest_difference("messages/edit", true) do change_template("comments/_comment") end ActionView::Resolver.caching = resolver_before end private def assert_logged(message) old_logger = ActionView::Base.logger log = StringIO.new ActionView::Base.logger = Logger.new(log) begin yield log.rewind assert_match message, log.read ensure ActionView::Base.logger = old_logger end end def assert_digest_difference(template_name, persistent = false) previous_digest = digest(template_name) ActionView::Digestor.cache.clear unless persistent yield assert previous_digest != digest(template_name), "digest didn't change" ActionView::Digestor.cache.clear end def digest(template_name, options={}) ActionView::Digestor.digest(template_name, :html, finder, options) end def finder @finder ||= FixtureFinder.new end def change_template(template_name) File.open("digestor/#{template_name}.html.erb", "w") do |f| f.write "\nTHIS WAS CHANGED!" end end end