dev: add some features to the ThreadSynchronizer helper class

test/test_integration_pending.rb

@@ -17,13 +17,13 @@ def send_to_main state
       @thread_to_main.push state
     end
 
-    def wait_for_thread expected_state
-      state = @thread_to_main.pop
+    def wait_for_thread expected_state, non_block = false
+      state = @thread_to_main.pop(non_block)
       raise "Invalid state #{state}. #{expected_state} is expected" if state != expected_state
     end
 
-    def wait_for_main expected_state
-      state = @main_to_thread.pop
+    def wait_for_main expected_state, non_block = false
+      state = @main_to_thread.pop(non_block)
       raise "Invalid state #{state}. #{expected_state} is expected" if state != expected_state
     end
 
@@ -34,6 +34,11 @@ def close_thread
     def close_main
       @main_to_thread.close
     end
+
+    def close
+      close_thread
+      close_main
+    end
   end
 
   def setup