/**
 * index-of-utest.c - unit tests for the index_of procedure.
 */

#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include "int-testing-tools.h"
#include "string-testing-tools.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
int_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;
    }
} // int_check

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


// +-------------+----------------------------------------------------
// | Typed Tests |
// +-------------+

/**
 * Some tests using integer arrays.
 * Strategy: Build the array { 0, 2, 4, 6, 8, ... }
 *   Even numbers of the form 2*i should be at position i.
 *   Odd numbers should not be in the array.
 */
void
int_tests ()
{
  int i;
  int values[SIZE];
  // Fill values with 0 2 4 6 8 ....
  for (i = 0; i < SIZE; i++)
    values[i] = 2 * i;

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

/**
 * Some tests using arrays of strings.
 * Strategy: Build the array { "B", "D", "F", "H", "J", ... }
 *   The string whose one letter is 'B' + 2*i should be at position
 *     i.
 *   All other strings should not be in the array.
 */
void
string_tests ()
{
  int i;
  char strings0[12][2];
  char *strings[12];
  char str[2];
  str[1] = 0;

  // Fill in strings
  for (i = 0; i < 12; i++)
    {
      strings0[i][0] = 'B' + 2*i;
      strings0[i][1] = 0;
      strings[i] = strings0[i];
    } // for

  // Systematic checks "A" ... "Y"
  string_check (strings, 12, "A", -1);
  for (i = 0; i < 12; i++)
    {
      str[0] = 'B' + 2*i;
      string_check (strings, 12, (char *) str, i);
      str[0] += 1;
      string_check (strings, 12, (char *) str, -1);
    }

  // Some other checks
  string_check (strings, 12, "", -1);
  string_check (strings, 12, "b", -1);
  string_check (strings, 12, "BB", -1);
} // string_tests


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

int
main ()
{
  // Run the tests
  int_tests ();
  string_tests ();

  // Check for errors.
  if (errors)
    printf ("%d errors encountered.\n", errors);
  return errors;
} // main