From 2a6dfd2545b78b91ddb690f30068742212862f81 Mon Sep 17 00:00:00 2001
From: Damian Tarnawski <gthetarnav@gmail.com>
Date: Sat, 23 Aug 2025 16:55:12 +0200
Subject: Avoid overlap issues when correcting memory after resize in
 _reserve_soa

---
 tests/core/runtime/test_core_runtime.odin | 58 +++++++++++++++++++++++--------
 1 file changed, 44 insertions(+), 14 deletions(-)

(limited to 'tests')

diff --git a/tests/core/runtime/test_core_runtime.odin b/tests/core/runtime/test_core_runtime.odin
index d74edd3f8..1bc100348 100644
--- a/tests/core/runtime/test_core_runtime.odin
+++ b/tests/core/runtime/test_core_runtime.odin
@@ -181,28 +181,58 @@ test_map_get :: proc(t: ^testing.T) {
 
 @(test)
 test_soa_array_allocator_resize :: proc(t: ^testing.T) {
+
 	arena: runtime.Arena
 	context.allocator = runtime.arena_allocator(&arena)
 	defer runtime.arena_destroy(&arena)
 
-	array, err := make(#soa[dynamic][2]int, 2, 3)
-	array[0] = [2]int{1, 2}
-	array[1] = [2]int{3, 4}
+	{
+		// |1 3 _ 2 4 _|
+		// |1 3 _ _ 2 4 _ _|
 
-	testing.expect_value(t, err, nil)
-	testing.expect_value(t, len(array), 2)
-	testing.expect_value(t, cap(array), 3)
+		array, err := make(#soa[dynamic][2]int, 2, 3)
+		array[0] = [2]int{1, 2}
+		array[1] = [2]int{3, 4}
 
-	err = resize(&array, 4)
+		testing.expect_value(t, err, nil)
+		testing.expect_value(t, len(array), 2)
+		testing.expect_value(t, cap(array), 3)
 
-	testing.expect_value(t, err, nil)
-	testing.expect_value(t, len(array), 4)
-	testing.expect_value(t, cap(array), 4)
+		err = resize(&array, 4)
+
+		testing.expect_value(t, err, nil)
+		testing.expect_value(t, len(array), 4)
+		testing.expect_value(t, cap(array), 4)
+
+		testing.expect_value(t, array[0], [2]int{1, 2})
+		testing.expect_value(t, array[1], [2]int{3, 4})
+		testing.expect_value(t, array[2], [2]int{0, 0})
+		testing.expect_value(t, array[3], [2]int{0, 0})
+	}
 
-	testing.expect_value(t, array[0], [2]int{1, 2})
-	testing.expect_value(t, array[1], [2]int{3, 4})
-	testing.expect_value(t, array[2], [2]int{0, 0})
-	testing.expect_value(t, array[3], [2]int{0, 0})
+	{
+		// |1 4 2 5 3 6|
+		// |1 4 _ _ 2 5 _ _ 3 6 _ _|
+
+		array, err := make(#soa[dynamic][3]int, 2, 2)
+		array[0] = [3]int{1, 2, 3}
+		array[1] = [3]int{4, 5, 6}
+
+		testing.expect_value(t, err, nil)
+		testing.expect_value(t, len(array), 2)
+		testing.expect_value(t, cap(array), 2)
+
+		err = resize(&array, 4)
+
+		testing.expect_value(t, err, nil)
+		testing.expect_value(t, len(array), 4)
+		testing.expect_value(t, cap(array), 4)
+
+		testing.expect_value(t, array[0], [3]int{1, 2, 3})
+		testing.expect_value(t, array[1], [3]int{4, 5, 6})
+		testing.expect_value(t, array[2], [3]int{0, 0, 0})
+		testing.expect_value(t, array[3], [3]int{0, 0, 0})
+	}
 }
 
 @(test)
-- 
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