// The purpose of this unit test is to check the interpreter::runPythonFile method
#include <cstring>
#include <iostream>

#include "dynamic-graph/python/interpreter.hh"

bool testFile(const std::string & filename, 
             const std::string & expectedOutput,
             int numTest)
{
  std::string err = "";
  dynamicgraph::python::Interpreter interp;
  for (int i=0; i<numTest; ++i)
  {
    interp.runPythonFile(filename, err);
    if (err != expectedOutput)
    {
      std::cerr << "At iteration " << i << ", the output was not the one expected:" << std::endl;
      std::cerr << " expected: " << expectedOutput << std::endl;
      std::cerr << " err:      " << err << std::endl;
      return false;
    }
  }  
  return true;
}

bool testInterpreterDestructor(const std::string & filename, 
             const std::string & expectedOutput)
{
  std::string err = "";
  {
    dynamicgraph::python::Interpreter interp;
    interp.runPythonFile(filename, err);
  }
  {
    dynamicgraph::python::Interpreter interp;
    interp.runPythonFile(filename, err);
    if (err != expectedOutput)
    {
      std::cerr << "The output was not the one expected:" << std::endl;
      std::cerr << " expected: " << expectedOutput << std::endl;
      std::cerr << " err:      " << err << std::endl;
      return false;
    }
  }  
  return true;
}

int main(int argc, char ** argv)
{
  // execute numerous time the same file.
  // While running 1025, we can notice a change in the error.
  // unfortunately, it can not be shown using a redirection of the streams
  int numTest = 1025;
  if (argc > 1)
    numTest = atoi(argv[1]);

  bool res = true;
  // This test succeeds only because it is launched before "test_python-ok.py"
  // because re as been imported in a previous test and it is not
  // safe to delete imported module...
  res = testFile("test_python-name_error.py", 
		 std::string("<type 'exceptions.NameError'>: name 're' is not defined:")+
		 "   File \"test_python-name_error.py\", line 6, in <module>\n" +
		 "    pathList = re.split(':', pkgConfigPath)\n", numTest) && res;

  res = testFile("test_python-ok.py", "", numTest) && res;
  res = testFile("unexistant_file.py", 
		 "unexistant_file.py cannot be open",
		 numTest) && res;
  res = testFile("test_python-syntax_error.py", 
		 std::string("<type 'exceptions.SyntaxError'>: ('invalid syntax', ")+
		 "('test_python-syntax_error.py', 1, 11, "+
		 "'hello world\\n'))", numTest) && res;
  res = testInterpreterDestructor ("test_python-restart_interpreter.py",
                                   "") && res;
  return (res?0:1);
}