From 032dadaf37a29c49c5f26560026eb938eb77ab3e Mon Sep 17 00:00:00 2001
From: Michael Davis <mcarsondavis@gmail.com>
Date: Wed, 22 Jan 2025 18:52:04 -0500
Subject: [PATCH] snippets: Add a test case for parsing `${0:placeholder}`

This is an example snippet sent by older versions of clangd.
---
 helix-core/src/snippets/parser.rs | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/helix-core/src/snippets/parser.rs b/helix-core/src/snippets/parser.rs
index 3d06e4176..74e940da8 100644
--- a/helix-core/src/snippets/parser.rs
+++ b/helix-core/src/snippets/parser.rs
@@ -361,7 +361,20 @@ mod test {
                 Text(")".into()),
             ]),
             parse("match(${1:Arg1})")
-        )
+        );
+        // The `$0` tabstop should not have placeholder text. The parser should handle this case
+        // normally and then the placeholder text should be discarded during elaboration.
+        assert_eq!(
+            Ok(vec![
+                Text("sizeof(".into()),
+                Placeholder {
+                    tabstop: 0,
+                    value: vec![Text("expression-or-type".into())],
+                },
+                Text(")".into()),
+            ]),
+            parse("sizeof(${0:expression-or-type})")
+        );
     }
 
     #[test]