vendor/rails/railties/test/plugin_loader_test.rb

   1 require File.dirname(__FILE__) + '/plugin_test_helper'
   2
   3 uses_mocha "Plugin Loader Tests" do
   4
   5   class TestPluginLoader < Test::Unit::TestCase
   6     ORIGINAL_LOAD_PATH = $LOAD_PATH.dup
   7
   8     def setup
   9       reset_load_path!
  10
  11       @configuration     = Rails::Configuration.new
  12       @configuration.plugin_paths << plugin_fixture_root_path
  13       @initializer       = Rails::Initializer.new(@configuration)
  14       @valid_plugin_path = plugin_fixture_path('default/stubby')
  15       @empty_plugin_path = plugin_fixture_path('default/empty')
  16
  17       @loader = Rails::Plugin::Loader.new(@initializer)
  18     end
  19
  20     def test_should_locate_plugins_by_asking_each_locator_specifed_in_configuration_for_its_plugins_result
  21       locator_1 = stub(:plugins => [:a, :b, :c])
  22       locator_2 = stub(:plugins => [:d, :e, :f])
  23       locator_class_1 = stub(:new => locator_1)
  24       locator_class_2 = stub(:new => locator_2)
  25       @configuration.plugin_locators = [locator_class_1, locator_class_2]
  26       assert_equal [:a, :b, :c, :d, :e, :f], @loader.send(:locate_plugins)
  27     end
  28
  29     def test_should_memoize_the_result_of_locate_plugins_as_all_plugins
  30       plugin_list = [:a, :b, :c]
  31       @loader.expects(:locate_plugins).once.returns(plugin_list)
  32       assert_equal plugin_list, @loader.all_plugins
  33       assert_equal plugin_list, @loader.all_plugins # ensuring that locate_plugins isn't called again
  34     end
  35
  36     def test_should_return_empty_array_if_configuration_plugins_is_empty
  37       @configuration.plugins = []
  38       assert_equal [], @loader.plugins
  39     end
  40
  41     def test_should_find_all_availble_plugins_and_return_as_all_plugins
  42       failure_tip = "It's likely someone has added a new plugin fixture without updating this list"
  43       assert_plugins [:a, :acts_as_chunky_bacon, :plugin_with_no_lib_dir, :stubby], @loader.all_plugins, failure_tip
  44     end
  45
  46     def test_should_return_all_plugins_as_plugins_when_registered_plugin_list_is_untouched
  47       failure_tip = "It's likely someone has added a new plugin fixture without updating this list"
  48       assert_plugins [:a, :acts_as_chunky_bacon, :plugin_with_no_lib_dir, :stubby], @loader.plugins, failure_tip
  49     end
  50
  51     def test_should_return_all_plugins_as_plugins_when_registered_plugin_list_is_nil
  52       @configuration.plugins = nil
  53       failure_tip = "It's likely someone has added a new plugin fixture without updating this list"
  54       assert_plugins [:a, :acts_as_chunky_bacon, :plugin_with_no_lib_dir, :stubby], @loader.plugins, failure_tip
  55     end
  56
  57     def test_should_return_specific_plugins_named_in_config_plugins_array_if_set
  58       plugin_names = [:acts_as_chunky_bacon, :stubby]
  59       only_load_the_following_plugins! plugin_names
  60       assert_plugins plugin_names, @loader.plugins
  61     end
  62
  63     def test_should_respect_the_order_of_plugins_given_in_configuration
  64       plugin_names = [:stubby, :acts_as_chunky_bacon]
  65       only_load_the_following_plugins! plugin_names
  66       assert_plugins plugin_names, @loader.plugins
  67     end
  68
  69     def test_should_load_all_plugins_in_natural_order_when_all_is_used
  70       only_load_the_following_plugins! [:all]
  71       failure_tip = "It's likely someone has added a new plugin fixture without updating this list"
  72       assert_plugins [:a, :acts_as_chunky_bacon, :plugin_with_no_lib_dir, :stubby], @loader.plugins, failure_tip
  73     end
  74
  75     def test_should_load_specified_plugins_in_order_and_then_all_remaining_plugins_when_all_is_used
  76       only_load_the_following_plugins! [:stubby, :acts_as_chunky_bacon, :all]
  77       failure_tip = "It's likely someone has added a new plugin fixture without updating this list"
  78       assert_plugins [:stubby, :acts_as_chunky_bacon, :a, :plugin_with_no_lib_dir], @loader.plugins, failure_tip
  79     end
  80
  81     def test_should_be_able_to_specify_loading_of_plugins_loaded_after_all
  82       only_load_the_following_plugins!  [:stubby, :all, :acts_as_chunky_bacon]
  83       failure_tip = "It's likely someone has added a new plugin fixture without updating this list"
  84       assert_plugins [:stubby, :a, :plugin_with_no_lib_dir, :acts_as_chunky_bacon], @loader.plugins, failure_tip
  85     end
  86
  87     def test_should_accept_plugin_names_given_as_strings
  88       only_load_the_following_plugins! ['stubby', 'acts_as_chunky_bacon', :a, :plugin_with_no_lib_dir]
  89       failure_tip = "It's likely someone has added a new plugin fixture without updating this list"
  90       assert_plugins [:stubby, :acts_as_chunky_bacon, :a, :plugin_with_no_lib_dir], @loader.plugins, failure_tip
  91     end
  92
  93     def test_should_add_plugin_load_paths_to_global_LOAD_PATH_array
  94       only_load_the_following_plugins! [:stubby, :acts_as_chunky_bacon]
  95       stubbed_application_lib_index_in_LOAD_PATHS = 5
  96       @loader.stubs(:application_lib_index).returns(stubbed_application_lib_index_in_LOAD_PATHS)
  97
  98       @loader.add_plugin_load_paths
  99
 100       assert $LOAD_PATH.index(File.join(plugin_fixture_path('default/stubby'), 'lib')) >= stubbed_application_lib_index_in_LOAD_PATHS
 101       assert $LOAD_PATH.index(File.join(plugin_fixture_path('default/acts/acts_as_chunky_bacon'), 'lib')) >= stubbed_application_lib_index_in_LOAD_PATHS
 102     end
 103
 104     def test_should_add_plugin_load_paths_to_Dependencies_load_paths
 105       only_load_the_following_plugins! [:stubby, :acts_as_chunky_bacon]
 106
 107       @loader.add_plugin_load_paths
 108
 109       assert Dependencies.load_paths.include?(File.join(plugin_fixture_path('default/stubby'), 'lib'))
 110       assert Dependencies.load_paths.include?(File.join(plugin_fixture_path('default/acts/acts_as_chunky_bacon'), 'lib'))
 111     end
 112
 113     def test_should_add_plugin_load_paths_to_Dependencies_load_once_paths
 114       only_load_the_following_plugins! [:stubby, :acts_as_chunky_bacon]
 115
 116       @loader.add_plugin_load_paths
 117
 118       assert Dependencies.load_once_paths.include?(File.join(plugin_fixture_path('default/stubby'), 'lib'))
 119       assert Dependencies.load_once_paths.include?(File.join(plugin_fixture_path('default/acts/acts_as_chunky_bacon'), 'lib'))
 120     end
 121
 122     def test_should_add_all_load_paths_from_a_plugin_to_LOAD_PATH_array
 123       plugin_load_paths = ["a", "b"]
 124       plugin = stub(:load_paths => plugin_load_paths)
 125       @loader.stubs(:plugins).returns([plugin])
 126
 127       @loader.add_plugin_load_paths
 128
 129       plugin_load_paths.each { |path| assert $LOAD_PATH.include?(path) }
 130     end
 131
 132     private
 133
 134       def reset_load_path!
 135         $LOAD_PATH.clear
 136         ORIGINAL_LOAD_PATH.each { |path| $LOAD_PATH << path }
 137       end
 138   end
 139
 140 end