Add test of Display for Ident

Author: dtolnay

tests/test.rs

@@ -705,6 +705,17 @@ fn raw_identifier() {
     assert!(tts.next().is_none());
 }
 
+#[test]
+fn test_display_ident() {
+    let ident = Ident::new("proc_macro", Span::call_site());
+    assert_eq!(format!("{ident}"), "proc_macro");
+    assert_eq!(format!("{ident:-^14}"), "--proc_macro--");
+
+    let ident = Ident::new_raw("proc_macro", Span::call_site());
+    assert_eq!(format!("{ident}"), "r#proc_macro");
+    assert_eq!(format!("{ident:-^14}"), "r#--proc_macro--"); // FIXME
+}
+
 #[test]
 fn test_debug_ident() {
     let ident = Ident::new("proc_macro", Span::call_site());