From f24ec48b27d4cb8dd0555840206dedbb45f1423c Mon Sep 17 00:00:00 2001
From: Dirk Engling <erdgeist@erdgeist.org>
Date: Sat, 24 Oct 2026 01:17:50 +0200
Subject: Add a unit test harness and a first set of tests

make check builds tests/runner from the modules that link without the
io subsystem and runs it.
---
 tests/test.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 tests/test.c

(limited to 'tests/test.c')

diff --git a/tests/test.c b/tests/test.c
new file mode 100644
index 0000000..4686369
--- /dev/null
+++ b/tests/test.c
@@ -0,0 +1,58 @@
+/* This software was written by Dirk Engling <erdgeist@erdgeist.org>
+   It is considered beerware. Prost. Skol. Cheers or whatever.
+
+   $id$ */
+
+/* System */
+#include <stdarg.h>
+#include <stdio.h>
+
+/* Opentracker */
+#include "test.h"
+
+unsigned long      test_checks;
+unsigned long      test_failures;
+
+static const char *current_module = "";
+static const char *current_case   = "";
+
+void               test_module(const char *name) {
+  current_module = name;
+  current_case   = "";
+  printf("%s\n", name);
+}
+
+void test_case(const char *name) { current_case = name; }
+
+static void test_where(const char *file, int line) {
+  ++test_failures;
+  printf("  FAIL %s/%s (%s:%d)\n    ", current_module, current_case, file, line);
+}
+
+void test_failf(const char *file, int line, const char *fmt, ...) {
+  va_list ap;
+  test_where(file, line);
+  va_start(ap, fmt);
+  vprintf(fmt, ap);
+  va_end(ap);
+  printf("\n");
+}
+
+void test_failmem(const char *file, int line, const char *what, const void *got, const void *want, size_t len) {
+  const unsigned char *g = got, *w = want;
+  size_t               i;
+
+  test_where(file, line);
+  printf("%s: %zu bytes differ\n      got  ", what, len);
+  for (i = 0; i < len; ++i)
+    printf("%02x", g[i]);
+  printf("\n      want ");
+  for (i = 0; i < len; ++i)
+    printf("%02x", w[i]);
+  printf("\n");
+}
+
+int test_summary(void) {
+  printf("\n%lu checks, %lu failures\n", test_checks, test_failures);
+  return test_failures != 0;
+}
-- 
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