Add tests

tests/wapptest.c

@@ -0,0 +1,11 @@
+#include "test_arena.h"
+#include "tester.h"
+#include <stdlib.h>
+
+int main(void) {
+  run_tests(test_arena_init, test_arena_alloc_succeeds_when_within_capacity,
+            test_arena_alloc_fails_when_over_capacity, test_arena_clear,
+            test_arena_destroy);
+
+  return EXIT_SUCCESS;
+}