From 5a82f06ba10dcdcb3cf384d30e0f3c879cb05ef1 Mon Sep 17 00:00:00 2001
From: Shane Shrybman <shrybman@teksavvy.com>
Date: Mon, 9 Mar 2026 14:51:35 -0400
Subject: [PATCH] Add virtual arena tests for bug #5821

---
 tests/core/mem/test_core_mem.odin | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/tests/core/mem/test_core_mem.odin b/tests/core/mem/test_core_mem.odin
index 9d64e50a3..3afd49a06 100644
--- a/tests/core/mem/test_core_mem.odin
+++ b/tests/core/mem/test_core_mem.odin
@@ -57,6 +57,33 @@ test_align_bumping_block_limit :: proc(t: ^testing.T) {
 	testing.expect(t, len(data) == 896)
 }
 
+@(test)
+test_large_minimum_block_size :: proc(t: ^testing.T) {
+	a: virtual.Arena
+	defer virtual.arena_destroy(&a)
+
+	init_err := virtual.arena_init_growing(&a, 16*mem.Megabyte)
+	testing.expect_value(t, init_err, nil)
+
+	align : uint = 4
+	for _ in 0..<6 {
+		data, err := virtual.arena_alloc(&a, 18874368, align)
+		testing.expect_value(t, err, nil)
+		testing.expect(t, len(data) == 18874368)
+		testing.expect(t, uintptr(raw_data(data)) & uintptr(align-1) == 0)
+		align *= 2
+		virtual.arena_free_all(&a)
+	}
+
+	align = 4
+	for _ in 0..<32 {
+		data, err := virtual.arena_alloc(&a, 1048576, align)
+		testing.expect_value(t, err, nil)
+		testing.expect(t, len(data) == 1048576)
+		testing.expect(t, uintptr(raw_data(data)) & uintptr(align-1) == 0)
+	}
+}
+
 @(test)
 tlsf_test_overlap_and_zero :: proc(t: ^testing.T) {
 	default_allocator := context.allocator