fix(formatter): should not merge tail with head for MemberChain when its parent is ArrowFunctionExpression (#14663)

Author: Dunqing

crates/oxc_formatter/src/utils/member_chain/mod.rs

@@ -94,7 +94,13 @@ impl<'a, 'b> MemberChain<'a, 'b> {
                 has_computed_property ||
                 is_factory(&identifier.name) ||
                 // If an identifier has a name that is shorter than the tab with, then we join it with the "head"
-                (matches!(parent, AstNodes::ExpressionStatement(_))
+                (matches!(parent, AstNodes::ExpressionStatement(stmt) if {
+                     if let AstNodes::ArrowFunctionExpression(arrow) = stmt.parent.parent() {
+                        !arrow.expression
+                     } else {
+                        true
+                     }
+                })
                     && has_short_name(&identifier.name, f.options().indent_width.value()))
             } else {
                 matches!(node.as_ref(), Expression::ThisExpression(_))

crates/oxc_formatter/tests/fixtures/js/member-chains/arrow.js

@@ -0,0 +1,4 @@
+(id) =>
+  id
+    .replace('@', resolve(__dirname, './mods/'))
+    .replace('#', resolve(__dirname, '../../'))

crates/oxc_formatter/tests/fixtures/js/member-chains/arrow.js.snap

@@ -0,0 +1,16 @@
+---
+source: crates/oxc_formatter/tests/fixtures/mod.rs
+---
+==================== Input ====================
+(id) =>
+  id
+    .replace('@', resolve(__dirname, './mods/'))
+    .replace('#', resolve(__dirname, '../../'))
+
+==================== Output ====================
+(id) =>
+  id
+    .replace("@", resolve(__dirname, "./mods/"))
+    .replace("#", resolve(__dirname, "../../"));
+
+===================== End =====================