test short structs

crates/ra_assists/src/ast_editor.rs

@@ -110,13 +110,20 @@ impl AstEditor<ast::NamedFieldList> {
 
         let position = match position {
             InsertPosition::First => after_l_curly!(),
-            InsertPosition::Last => match self.ast().fields().last() {
-                Some(it) => after_field!(it),
-                None => after_l_curly!(),
-            },
+            InsertPosition::Last => {
+                if !is_multiline {
+                    // don't insert comma before curly
+                    to_insert.pop();
+                }
+                match self.ast().fields().last() {
+                    Some(it) => after_field!(it),
+                    None => after_l_curly!(),
+                }
+            }
             InsertPosition::Before(anchor) => InsertPosition::Before(anchor.syntax().into()),
             InsertPosition::After(anchor) => after_field!(anchor),
         };
+
         self.ast = self.insert_children(position, to_insert.iter().cloned());
     }
 

crates/ra_assists/src/fill_struct_fields.rs

@@ -194,4 +194,31 @@ mod tests {
             "#,
         );
     }
+
+    #[test]
+    fn fill_struct_short() {
+        check_assist(
+            fill_struct_fields,
+            r#"
+            struct S {
+                foo: u32,
+                bar: String,
+            }
+
+            fn main() {
+                let s = S {<|> };
+            }
+            "#,
+            r#"
+            struct S {
+                foo: u32,
+                bar: String,
+            }
+
+            fn main() {
+                let s = <|>S { foo: (), bar: () };
+            }
+            "#,
+        );
+    }
 }

crates/ra_syntax/src/syntax_node.rs

@@ -24,6 +24,7 @@ use crate::{
 pub use rowan::WalkEvent;
 pub(crate) use rowan::{GreenNode, GreenToken};
 
+#[derive(Debug, PartialEq, Eq, Clone, Copy)]
 pub enum InsertPosition<T> {
     First,
     Last,