/**
 * utest_index_of.c - unit tests for the index_of procedure.
 */

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


// +-----------+------------------------------------------------------
// | Constants |
// +-----------+

/** The size of the array we use for testing. */
#define SIZE 16


// +-----------+------------------------------------------------------
// | Variables |
// +-----------+

/**
 * A count of errors.
 */
static int errors = 0;

// +---------+--------------------------------------------------------
// | Helpers |
// +---------+

void
check (int values[], int size, int value, int expected)
{
  int result = index_of (values, size, value);
  if (result != expected)
    {
      printf ("In searching for %d in the  size %d array, "
              "expected %d, got %d.\n",
              value, size, expected, result);
      ++errors;
    }
}

// +------+-----------------------------------------------------------
// | Main |
// +------+

int
main ()
{
  int i;
  int values[SIZE];

  // Fill values
  for (i = 0; i < SIZE; i++)
    values[i] = 2 * i;

  check (values, SIZE, -1, -1);
  for (i = 0; i < SIZE; i++)
    {
      check (values, SIZE, 2*i, i);
      check (values, SIZE, 2*i+1, -1);
    }

  if (errors)
    {
      printf ("%d errors encountered.\n", errors);
      return EXIT_FAILURE;
    }
  else
    {
      return EXIT_SUCCESS;
    }
} // main