add watched_directories

lib/guard/compat/example.rb

@@ -28,6 +28,7 @@ def run_all
     def run_on_modifications
       Guard::Compat::UI.color_enabled?
       Guard::Compat.matching_files(self, ['foo'])
+      Guard::Compat.watched_directories
     end
   end
 end

lib/guard/compat/plugin.rb

@@ -36,6 +36,22 @@ def self.matching_files(plugin, files)
       Guard::Watcher.match_files(plugin, files).uniq
     end
 
+    def self.watched_directories
+      unless Guard.const_defined?('CLI')
+        msg = 'either Guard has not been required or you did not' \
+          ' stub this method in your plugin tests'
+        fail NotImplementedError, msg
+      end
+
+      if Guard.respond_to?(:state)
+        # TODO: the new version is temporary
+        Guard.state.session.watchdirs.map { |d| Pathname(d) }
+      else
+        dirs = Array(Guard.options(:watchdir))
+        dirs.empty? ? [Pathname.pwd] : dirs.map { |d| Pathname(d) }
+      end
+    end
+
     module UI
       def self.color(text, *colors)
         Guard::UI.send(:color, text, *colors)

spec/guard/compat/example_spec.rb

@@ -43,6 +43,7 @@
   describe '#run_on_modifications' do
     before do
       allow(Guard::Compat).to receive(:matching_files)
+      allow(Guard::Compat).to receive(:watched_directories)
     end
 
     before { subject.run_on_modifications }