From 2d730cdf657ee7b70ce749a200820760bc3e21aa Mon Sep 17 00:00:00 2001
From: Maik Klein <maikklein@googlemail.com>
Date: Sat, 9 Mar 2019 19:52:25 +0100
Subject: [PATCH] Add ptrchain external test file

---
 ash/tests/ptrchain.rs | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 ash/tests/ptrchain.rs

diff --git a/ash/tests/ptrchain.rs b/ash/tests/ptrchain.rs
new file mode 100644
index 0000000..eca4d09
--- /dev/null
+++ b/ash/tests/ptrchain.rs
@@ -0,0 +1,21 @@
+extern crate ash;
+use ash::vk;
+#[test]
+fn test_ptr_chains() {
+    let mut variable_pointers = vk::PhysicalDeviceVariablePointerFeatures::builder();
+    let mut corner = vk::PhysicalDeviceCornerSampledImageFeaturesNV::builder();
+    let chain = vec![
+        &variable_pointers as *const _ as usize,
+        &corner as *const _ as usize,
+    ];
+    let mut device_create_info = vk::DeviceCreateInfo::builder()
+        .push_next(&mut corner)
+        .push_next(&mut variable_pointers);
+    let chain2: Vec<usize> = unsafe {
+        vk::ptr_chain_iter(&mut device_create_info)
+            .skip(1)
+            .map(|ptr| ptr as usize)
+            .collect()
+    };
+    assert_eq!(chain, chain2);
+}