diff vendor/plugins/engines/test/unit/load_path_test.rb @ 0:513646585e45

* Import Redmine trunk SVN rev 3859

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/plugins/engines/test/unit/load_path_test.rb	Fri Jul 23 15:52:44 2010 +0100
@@ -0,0 +1,58 @@
+# Tests in this file ensure that:
+#
+# * the application /app/[controllers|helpers|models] and /lib 
+#   paths preceed the corresponding plugin paths
+# * the plugin paths are added to $LOAD_PATH in the order in which plugins are 
+#   loaded
+
+require File.dirname(__FILE__) + '/../test_helper'
+
+class LoadPathTest < Test::Unit::TestCase
+  def setup
+    @load_path = expand_paths($LOAD_PATH)
+  end
+  
+  # Not sure if these test actually make sense as this now essentially tests
+  # Rails core functionality. On the other hand Engines relies on this to some
+  # extend so this will choke if something important changes in Rails.
+  
+  # the application app/... and lib/ directories should appear
+  # before any plugin directories
+  
+  def test_application_app_libs_should_precede_all_plugin_app_libs
+    types = %w(app/controllers app/helpers app/models lib)
+    types.each do |t|
+      app_index = load_path_index(File.join(RAILS_ROOT, t))
+      assert_not_nil app_index, "#{t} is missing in $LOAD_PATH"
+      Engines.plugins.each do |plugin|
+        first_plugin_index = load_path_index(File.join(plugin.directory, t))
+        assert(app_index < first_plugin_index) unless first_plugin_index.nil?
+      end
+    end
+  end
+  
+  # the engine directories should appear in the proper order based on
+  # the order they were started  
+  
+  def test_plugin_dirs_should_appear_in_reverse_plugin_loading_order
+    app_paths = %w(app/controllers/ app app/models app/helpers lib)
+    app_paths.map { |p| File.join(RAILS_ROOT, p)}
+    plugin_paths = Engines.plugins.reverse.collect { |plugin| plugin.load_paths.reverse }.flatten    
+    
+    expected_paths = expand_paths(app_paths + plugin_paths)    
+    # only look at those paths that are also present in expected_paths so
+    # the only difference would be in the order of the paths
+    actual_paths = @load_path & expected_paths 
+    
+    assert_equal expected_paths, actual_paths
+  end
+  
+  protected    
+    def expand_paths(paths)
+      paths.collect { |p| File.expand_path(p) }
+    end
+    
+    def load_path_index(dir)
+      @load_path.index(File.expand_path(dir))
+    end  
+end
\ No newline at end of file