Improve test allocator API

Add a simple API for setting up the failing allocator to avoid manually
tinkering with its members.  Conveniently, this also avoids confusing cppcheck.

1 files changed, 2 insertions, 2 deletions

diff --git a/test/test_tree.c b/test/test_tree.c
index fae6d85..ff63999 100644
--- a/test/test_tree.c
+++ b/test/test_tree.c
@@ -211,9 +211,9 @@ test_failed_alloc(void)
   assert(!stress(&allocator.base, 0, 16));
 
   // Test that each allocation failing is handled gracefully
-  const size_t n_new_allocs = allocator.n_allocations;
+  const size_t n_new_allocs = zix_failing_allocator_reset(&allocator, 0);
   for (size_t i = 0U; i < n_new_allocs; ++i) {
-    allocator.n_remaining = i;
+    zix_failing_allocator_reset(&allocator, i);
     assert(stress(&allocator.base, 0, 16));
   }
 }