From b7ba9c01a126c182c1b29eec49dc34fc05c1c9c2 Mon Sep 17 00:00:00 2001
From: camc314 <18101008+camc314@users.noreply.github.com>
Date: Fri, 23 Aug 2024 12:45:22 +0000
Subject: [PATCH] fix(linter) fix bug in fixer for prefer-function-type when
 interface is exported (#5122)

part of https://github.com/oxc-project/oxc/issues/5103
---
 .../src/rules/typescript/prefer_function_type.rs      | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/crates/oxc_linter/src/rules/typescript/prefer_function_type.rs b/crates/oxc_linter/src/rules/typescript/prefer_function_type.rs
index 485b0094c..3ab61df59 100644
--- a/crates/oxc_linter/src/rules/typescript/prefer_function_type.rs
+++ b/crates/oxc_linter/src/rules/typescript/prefer_function_type.rs
@@ -206,8 +206,10 @@ fn check_member(member: &TSSignature, node: &AstNode<'_>, ctx: &LintContext<'_>)
 
                                     Fix::new(
                                         format!(
-                                            "type {} = {};",
-                                            &interface_decl.id.name, &suggestion
+                                            "{} {} = {};",
+                                            if is_parent_exported { "export type" } else { "type" },
+                                            &interface_decl.id.name,
+                                            &suggestion
                                         ),
                                         Span::new(node_start, node_end),
                                     )
@@ -718,6 +720,11 @@ type X = {} & (() => void);
                       ",
             None,
         ),
+        (
+            "export interface AnyFn { (...args: any[]): any }",
+            "export type AnyFn = (...args: any[]) => any;",
+            None,
+        ),
     ];
 
     Tester::new(PreferFunctionType::NAME, pass, fail).expect_fix(fix).test_and_snapshot();