/*
   TestRational.cpp
   CIS 250
   David Klick

   Test driver program for Rational class.
*/

#include "Rational.h"
#include <iostream>
#include <stdexcept>
#include <cstdio>
using std::cin;
using std::cout;
using std::cerr;
using std::endl;
using std::boolalpha;
using std::invalid_argument;

int main(void) {
   // create rational number objects
   Rational r[7] = { Rational(),
                     Rational(2,3),
                     Rational(12,15),
                     Rational(-15,-12),
                     Rational(4,3),
                     Rational(3,2),
                     Rational(0,3) };
   int i;

   // display rational numbers created
   for (i=0; i<7; i++) cout << "r[" << i << "] = " << r[i] << '\n';

   cout << "Testing math operators:" << endl;
   cout << "r[1] + r[4] = " << r[1] + r[4] << endl;
   cout << "r[1] - r[4] = " << r[1] - r[4] << endl;
   cout << "r[1] / r[4] = " << r[1] / r[4] << endl;
   cout << "r[1] * r[4] = " << r[1] * r[4] << endl;
   cout << "r[1] * r[5] = " << r[1] * r[5] << endl;
   cout << "r[5] - r[5] = " << r[5] - r[5] << endl;
   cout << "Trying an invalid division:\n";
   try {
      cout << "r[3] / r[6] = " << r[3] / r[6] << endl;
   } catch (invalid_argument e) {
       cerr << e.what() << '\n';
   }
   
   cout << "Testing increment and decrement operators:" << endl;
   cout << "++r[1] = " << ++r[1] << endl;
   cout << "--r[1] = " << --r[1] << endl;
   cout << "r[1]++ = " << r[1]++ << endl;
   cout << "r[1]-- = " << r[1]-- << endl;
   cout << "r[1] = " << r[1] << endl;

   cout << "Testing relational and assignment operators:" << endl;
   r[2] = r[0];
   cout << boolalpha << "r[2] set to r[0]\n";
   cout << "r[0] > r[1] = " << (r[0] > r[1]) << endl;   // true
   cout << "r[0] < r[1] = " << (r[0] < r[1]) << endl;   // false
   cout << "r[0] == r[1] = " << (r[0] == r[1]) << endl;  // false
   cout << "r[0] != r[1] = " << (r[0] != r[1]) << endl;  // true
   cout << "r[0] == r[2] = " << (r[0] == r[2]) << endl;  // true
   cout << "r[0] <= r[1] = " << (r[0] <= r[1]) << endl;  // false
   cout << "r[0] >= r[1] = " << (r[0] >= r[1]) << endl;  // true
   cout << "r[0] >= r[2] = " << (r[0] >= r[2]) << endl;  // true
   cout << "r[0] <= r[2] = " << (r[0] <= r[2]) << endl;  // true

   cout << "Testing display style setting:" << endl;
   for (i=0; i<6; i++) {
      Rational::setDisplayStyle(Rational::FRACTIONAL);
      cout << "r[" << i << "] = " << r[i] << " = ";
      Rational::setDisplayStyle(Rational::FLOATING_POINT);
      cout << r[i] << '\n';
   }
   Rational::setDisplayStyle(Rational::FRACTIONAL);

   try {
      cout << "Try to create invalid Rational object:" << endl;
      Rational badrat(2,0);
   } catch (invalid_argument e) {
       cerr << e.what() << '\n';
   }

   try {
      cout << "Try to set invalid denominator:" << endl;
      r[2].setNums(-7, 0);
   } catch (invalid_argument e) {
       cerr << e.what() << '\n';
   }

   cout << "Test of extraction operator overload\n";
   cin >> r[0];
   cout << "You entered: " << r[0] << '\n';

   cout << "*** End of test" << endl;
   return 0;
}