/**
 * avetestc.c - An non-interactive unit test of the average procedure.
 */

#include <stdio.h>
#include <stdlib.h>
#include <limits.h>

#include "average.h"

int errors = 0;  // The count of errors

/**
 * Procedure:
 *   report
 * Parameters
 *   values, an array of integers
 *   count, an integer
 *   expected, an integer
 * Purpose:
 *   Check if we get a result we expect.
 * Produces:
 *   [Nothing; Called for the side effect.]
 * Pre: 
 *   values[] contains at least count values
 *   count > 0
 */
void
report (int values[], int count, int expected)
{
  int i;
  int ave = average (values, count);

  if (ave != expected)
    {
      ++errors;
      printf ("For average ({%d", values[0]);
      for (i = 1; i < count; i++)
        {
          printf (",%d", values[i]);
        } // for
      printf ("}), expected %d, got %d.\n", expected, ave);
    }
} // report

int
main ()
{
  int values1[] = { 10, 20, 40, 0, 80 };
  int values2[] = { -20, -30, -40 };
  int values3[] = { -20, 10, 40, -10, 80 };
  int values4[] = { INT_MAX, INT_MAX, INT_MAX, INT_MAX };
  int values5[] = { INT_MIN, INT_MIN, INT_MIN, INT_MIN };
  int values6[] = { 44, 10, 19 };
  int values7[] = { 1 };

  int i;

  report (values6, 3, 24);
  report (values6, 1, 44);
  report (values6, 2, 27);
  report (values7, 1, 1);

/*
  report (values1, 5);
  report (values1, 3);
  report (values2, 3);
  report (values3, 1);
  report (values3, 3);
  report (values3, 5);
 */

  for (i = 1; i <= 4; i++)
    report (values4, i, INT_MAX);

  for (i = 1; i <= 4; i++)
    report (values5, i, INT_MIN);

  // And we're done
  if (errors)
    return EXIT_FAILURE;
  else
    return EXIT_SUCCESS;
} // main