From d1cfdd15a0548d1bf9fc0f51c8df63eaffa4c7a4 Mon Sep 17 00:00:00 2001
From: Igor Shaposhnik <ishaposhnik@icloud.com>
Date: Wed, 27 Oct 2021 11:59:15 +0300
Subject: [PATCH] Add test for last falltrough switch case

---
 tests/wgsl-errors.rs | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/tests/wgsl-errors.rs b/tests/wgsl-errors.rs
index ab9232bbfd..4bf6b557af 100644
--- a/tests/wgsl-errors.rs
+++ b/tests/wgsl-errors.rs
@@ -988,3 +988,24 @@ fn select() {
         if name.starts_with("select_")
     }
 }
+
+#[test]
+fn last_case_falltrough() {
+    check_validation_error! {
+        "
+        fn test_falltrough() {
+          switch(0) {
+            case 0: {
+              fallthrough;
+            }
+          }
+        }
+        ":
+        Err(
+            naga::valid::ValidationError::Function {
+                error: naga::valid::FunctionError::LastCaseFallTrough,
+                ..
+            },
+        )
+    }
+}