// test.h - Minimal test assertion macros
//
// Not a library for distribution. Intended for the test suite only.
// Provides ASSERT, ASSERT_FLOAT_EQ, and ASSERT_STR_EQ macros with
// failure tracking via a global test_failures counter.

#ifndef TEST_H
#define TEST_H

#include <stdio.h>
#include <string.h>
#include <math.h>

#include "type.h"

#ifndef TEST_EPS
#define TEST_EPS 1e-9
#endif

#ifndef TEST_FAILURES_VAR
#define TEST_FAILURES_VAR int test_failures = 0
#endif

#define ASSERT(cond, msg)                                                       \
  do {                                                                          \
    if (!(cond)) {                                                              \
      fprintf(stderr, "FAIL: %s (%s:%d)\n", msg, __FILE__, __LINE__);          \
      test_failures++;                                                          \
    }                                                                           \
  } while (0)

#define ASSERT_FLOAT_EQ(a, b, msg)                                              \
  do {                                                                          \
    f64 _a = (a);                                                               \
    f64 _b = (b);                                                               \
    if (fabs(_a - _b) > TEST_EPS) {                                            \
      fprintf(stderr, "FAIL: %s (got %f, expected %f) (%s:%d)\n",              \
              msg, (double)_a, (double)_b, __FILE__, __LINE__);                 \
      test_failures++;                                                          \
    }                                                                           \
  } while (0)

#define ASSERT_STR_EQ(a, b, msg)                                                \
  do {                                                                          \
    char const *_a = (a);                                                       \
    char const *_b = (b);                                                       \
    if (_a == NULL || _b == NULL || strcmp(_a, _b) != 0) {                     \
      fprintf(stderr, "FAIL: %s (got '%s', expected '%s') (%s:%d)\n",          \
              msg, _a ? _a : "NULL", _b ? _b : "NULL", __FILE__, __LINE__);    \
      test_failures++;                                                          \
    }                                                                           \
  } while (0)

#define TEST_PRINT_RESULTS(name)                                                \
  printf("%s: %d failures\n", name, test_failures)

#endif /* TEST_H */