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# frozen_string_literal: true
require "isolation/abstract_unit"
require "rails/zeitwerk_checker"
class ZeitwerkCheckerTest < ActiveSupport::TestCase
include ActiveSupport::Testing::Isolation
def setup
build_app
end
def boot(env = "development")
app(env)
end
test "returns an empty list for a default application" do
boot
assert_empty Rails::ZeitwerkChecker.check
end
test "raises if there is a missing constants in autoload_paths" do
app_file "app/models/user.rb", ""
boot
e = assert_raises(Zeitwerk::NameError) do
Rails::ZeitwerkChecker.check
end
assert_includes e.message, "expected file #{app_path}/app/models/user.rb to define constant User"
end
test "raises if there is a missing constant in autoload_once_paths" do
app_dir "extras"
app_file "extras/x.rb", ""
add_to_config 'config.autoload_once_paths << "#{Rails.root}/extras"'
add_to_config 'config.eager_load_paths << "#{Rails.root}/extras"'
boot
e = assert_raises(Zeitwerk::NameError) do
Rails::ZeitwerkChecker.check
end
assert_includes e.message, "expected file #{Rails.root}/extras/x.rb to define constant X"
end
test "returns an empty list unchecked directories do not exist" do
add_to_config 'config.autoload_paths << "#{Rails.root}/dir1"'
add_to_config 'config.autoload_once_paths << "#{Rails.root}/dir2"'
boot
assert_empty Rails::ZeitwerkChecker.check
end
test "returns an empty list if unchecked directories are empty" do
app_dir "dir1"
add_to_config 'config.autoload_paths << "#{Rails.root}/dir1"'
app_dir "dir2"
add_to_config 'config.autoload_once_paths << "#{Rails.root}/dir2"'
boot
assert_empty Rails::ZeitwerkChecker.check
end
test "returns unchecked directories" do
app_dir "dir1"
app_file "dir1/x.rb", "X = 1"
add_to_config 'config.autoload_paths << "#{Rails.root}/dir1"'
app_dir "dir2"
app_file "dir2/y.rb", "Y = 1"
add_to_config 'config.autoload_once_paths << "#{Rails.root}/dir2"'
boot
assert_equal ["#{app_path}/dir1", "#{app_path}/dir2"], Rails::ZeitwerkChecker.check.sort
end
end
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