fix(formatter): expand the parent if the member chain will break

Author: Dunqing

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

@@ -235,6 +235,13 @@ impl<'a> Format<'a> for MemberChain<'a, '_> {
             if has_comment || has_new_line_or_comment_between || self.groups_should_break(f) {
                 write!(f, [group(&format_expanded)])
             } else {
+                let has_empty_line_before_tail =
+                    self.tail.first().is_some_and(MemberChainGroup::needs_empty_line);
+
+                if has_empty_line_before_tail || self.last_group().will_break(f) {
+                    write!(f, [expand_parent()])?;
+                }
+
                 write!(f, [best_fitting!(format_one_line, format_expanded)])
             }
         });

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

@@ -0,0 +1,10 @@
+id === null
+  ? null
+  : internal.getSuspenseCache(client).getFragmentRef(
+      [id, options.fragment, cache.canonicalStringify(variables)],
+      client,
+      tslib.__assign(tslib.__assign({}, options), {
+        variables: variables,
+        from: id,
+      }),
+    );

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

@@ -0,0 +1,28 @@
+---
+source: crates/oxc_formatter/tests/fixtures/mod.rs
+---
+==================== Input ====================
+id === null
+  ? null
+  : internal.getSuspenseCache(client).getFragmentRef(
+      [id, options.fragment, cache.canonicalStringify(variables)],
+      client,
+      tslib.__assign(tslib.__assign({}, options), {
+        variables: variables,
+        from: id,
+      }),
+    );
+
+==================== Output ====================
+id === null
+  ? null
+  : internal.getSuspenseCache(client).getFragmentRef(
+      [id, options.fragment, cache.canonicalStringify(variables)],
+      client,
+      tslib.__assign(tslib.__assign({}, options), {
+        variables: variables,
+        from: id,
+      }),
+    );
+
+===================== End =====================