[tests] Improve test on pool

Testing and checking output of writeGraph.

tests/pool.cpp

@@ -19,6 +19,8 @@
 #include <dynamic-graph/factory.h>
 #include <dynamic-graph/exception-factory.h>
 #include <dynamic-graph/pool.h>
+#include <dynamic-graph/signal-ptr.h>
+#include <dynamic-graph/signal-time-dependent.h>
 
 #define BOOST_TEST_MODULE pool
 
@@ -31,9 +33,18 @@ struct MyEntity : public dynamicgraph::Entity
 {
   static const std::string CLASS_NAME;
 
+  dynamicgraph::SignalPtr<double, int> m_sigdSIN;
+  dynamicgraph::SignalTimeDependent<double, int> m_sigdTimeDepSOUT;
+  
   MyEntity (const std::string& name)
     : Entity (name)
-  {}
+    ,m_sigdSIN(NULL,"MyEntity("+name+")::input(double)::in_double")
+    ,m_sigdTimeDepSOUT(boost::bind(&MyEntity::update,this,_1,_2),
+		       m_sigdSIN,
+		       "MyEntity("+name+")::input(double)::out_double")
+  {
+    signalRegistration(m_sigdSIN << m_sigdTimeDepSOUT);
+  }
 
   virtual void display (std::ostream& os) const
   {
@@ -44,6 +55,14 @@ struct MyEntity : public dynamicgraph::Entity
   {
     return CLASS_NAME;
   }
+
+  double & update(double &res, const int &inTime)
+  {
+    const double &aDouble = m_sigdSIN(inTime);
+    res = aDouble;
+    return res;
+  }
+  
 };
 
 DYNAMICGRAPH_FACTORY_ENTITY_PLUGIN (MyEntity, "MyEntity");
@@ -80,7 +99,41 @@ BOOST_AUTO_TEST_CASE (pool_display)
   // Testing the completion list of pool storage
   dg::PoolStorage::getInstance()->writeCompletionList
     (output);
-  BOOST_CHECK (output.is_equal ("print\nsignals\nsignalDep\n"));
+  BOOST_CHECK (output.is_equal ("MyEntityInst.in_double\nMyEntityInst.out_double\nprint\nsignals\nsignalDep\n"));
+
+  // Checking the graph generated by the pool
+  dg::PoolStorage::getInstance()->writeGraph("output.dot");
+  std::fstream the_debug_file;
+  the_debug_file.open("output.dot");
+  std::ostringstream oss_output_wgph;
+  oss_output_wgph << the_debug_file.rdbuf();
+  the_debug_file.close();
+
+  /* Use a predefined output */
+  std::string str_to_test="/* This graph has been automatically generated.\n"
+			      "   2019 Month: 2 Day: 28 Time: 11:28 */\n"
+			      "digraph \"output\" { 	 graph [ label=\"output\" bgcolor = white rankdir=LR ]\n"
+			      "\t node [ fontcolor = black, color = black, fillcolor = gold1, style=filled, shape=box ] ; \n"
+			      "\tsubgraph cluster_Entities { \n"
+			      "\t} \n"
+			      "\"MyEntityInst\" [ label = \"MyEntityInst\" ,\n"
+			      "   fontcolor = black, color = black, fillcolor=cyan, style=filled, shape=box ]\n"
+    "}\n";
+
+  /* Check the two substring (remove the date) */
+  std::string s_output_wgph = oss_output_wgph.str();
+  std::string s_crmk="*/";
+
+  std::size_t find_s_output_wgph = s_output_wgph.find(s_crmk);
+  std::string sub_s_output_wgph =s_output_wgph.substr(find_s_output_wgph, s_output_wgph.length());
+  std::size_t find_str_to_test = str_to_test.find(s_crmk);
+  std::string sub_str_to_test =str_to_test.substr(find_str_to_test, str_to_test.length());
+
+  bool two_sub_string_identical;
+  two_sub_string_identical=sub_str_to_test==sub_s_output_wgph;
+  
+  BOOST_CHECK(two_sub_string_identical);
+
   
   // Deregister the entity.
   dg::PoolStorage::getInstance()->deregisterEntity