#include <mrw/auto.hpp>
#include <cppunit/TestFixture.h>
#include <cppunit/ui/text/TestRunner.h>
#include <cppunit/extensions/HelperMacros.h>
#include <cppunit/extensions/TestFactoryRegistry.h>
#include <fcntl.h> // open

class AutoTest: public CppUnit::TestFixture { 
public: 
  void AutoFile() {
    char c(0);
    int i(-1);
    {
      mrw::AutoFile a;
      CPPUNIT_ASSERT(a==-1); // init as -1
      i = a = open("test.dat", O_RDONLY);
      CPPUNIT_ASSERT(i==a && a>0); // file is now open
      mrw::AutoFile b(a);
      CPPUNIT_ASSERT(a==-1 && i==b); // b has taken ownership
      CPPUNIT_ASSERT(read(b, &c, 1)==1 && c=='H'); // file is good
      mrw::AutoFile c(i);
      CPPUNIT_ASSERT(i==b && b==c); // ooops, two owner!
      c.release();
      CPPUNIT_ASSERT(i==b && c==-1); // it's ok now
      b = open("test.dat", O_RDONLY);
      //close(i);
      CPPUNIT_ASSERT(read(i, &c, 1)==-1); // old file is closed
      i = b.reset();
      CPPUNIT_ASSERT(read(i, &c, 1)==-1); // new file is closed
      i = a = open("test.dat", O_RDONLY);
    }
    CPPUNIT_ASSERT(read(i, &c, 1)==-1); // file is closed now
  }
  CPPUNIT_TEST_SUITE(AutoTest);
  CPPUNIT_TEST(AutoFile);
  CPPUNIT_TEST_SUITE_END();
};
CPPUNIT_TEST_SUITE_REGISTRATION(AutoTest);

int main() {
  CppUnit::TextUi::TestRunner runner;
  runner.addTest(CppUnit::TestFactoryRegistry::getRegistry().makeTest());
  return runner.run() ? 0 : 1;
}