test: implement shared check() macro

test/shared/test-util.c

@@ -0,0 +1,9 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "test-util.h"
+
+void check_fail(const char* message) {
+  puts(message);
+  abort();
+}

test/shared/test-util.h

@@ -0,0 +1,29 @@
+#ifndef TEST_UTIL_H_
+#define TEST_UTIL_H_
+
+#ifdef _MSC_VER
+#define no_return _declspec(noreturn)
+#else /* GCC/clang */
+#define no_return __attribute__((noreturn))
+#endif
+
+#ifdef _MSC_VER
+#define no_inline _declspec(noinline)
+#else /* GCC/clang */
+#define no_inline __attribute__((noinline))
+#endif
+
+void no_inline no_return check_fail(const char* message);
+
+#define __check_to_string_helper(v) #v
+#define __check_to_string(v) __check_to_string_helper(v)
+
+#define check(expression)                                           \
+  (void) ((!!(expression)) ||                                       \
+          (check_fail("Check failed:\n"                             \
+                      "  test: " #expression "\n"                   \
+                      "  file: " __FILE__ "\n"                      \
+                      "  line: " __check_to_string(__LINE__) "\n"), \
+           0))
+
+#endif /* TEST_UTIL_H_ */