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require 'abstract_unit'
require 'fileutils'
class FixtureTemplate
attr_reader :source
def initialize(template_path)
@source = File.read(template_path)
rescue Errno::ENOENT
raise ActionView::MissingTemplate.new([], "", [], true, [])
end
end
class FixtureFinder
FIXTURES_DIR = "#{File.dirname(__FILE__)}/../fixtures/digestor"
TMP_DIR = "#{File.dirname(__FILE__)}/../tmp"
def find(logical_name, keys, partial, options)
FixtureTemplate.new("#{TMP_DIR}/#{partial ? logical_name.gsub(%r|/([^/]+)$|, '/_\1') : logical_name}.#{options[:formats].first}.erb")
end
end
class TemplateDigestorTest < ActionView::TestCase
def setup
FileUtils.cp_r FixtureFinder::FIXTURES_DIR, FixtureFinder::TMP_DIR
end
def teardown
FileUtils.rm_r FixtureFinder::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_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_logging_of_missing_template
assert_logged "Couldn't find template for digesting: messages/something_missing.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_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
private
def assert_logged(message)
log = StringIO.new
ActionView::Digestor.logger = Logger.new(log)
yield
log.rewind
assert_match message, log.read
ActionView::Digestor.logger = nil
end
def assert_digest_difference(template_name)
previous_digest = digest(template_name)
ActionView::Digestor.cache.clear
yield
assert previous_digest != digest(template_name), "digest didn't change"
ActionView::Digestor.cache.clear
end
def digest(template_name)
ActionView::Digestor.digest(template_name, :html, FixtureFinder.new)
end
def change_template(template_name)
File.open("#{FixtureFinder::TMP_DIR}/#{template_name}.html.erb", "w") do |f|
f.write "\nTHIS WAS CHANGED!"
end
end
end
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