[DAS] Fixes missing "Add import" case

Fixes: #61128
Change-Id: I889be4860d2ce1bb2321531620988dd2ffc9b6f0
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/442720
Auto-Submit: Felipe Morschel <[email protected]>
Commit-Queue: Brian Wilkerson <[email protected]>
Reviewed-by: Samuel Rawlins <[email protected]>
Reviewed-by: Brian Wilkerson <[email protected]>

Author: FMorschel

pkg/analysis_server/lib/src/services/correction/error_fix_status.yaml

@@ -1125,7 +1125,7 @@ CompileTimeErrorCode.MIXIN_SUPER_CLASS_CONSTRAINT_DISALLOWED_CLASS:
 CompileTimeErrorCode.MIXIN_SUPER_CLASS_CONSTRAINT_NON_INTERFACE:
   status: hasFix
 CompileTimeErrorCode.MIXIN_WITH_NON_CLASS_SUPERCLASS:
-  status: noFix
+  status: hasFix
 CompileTimeErrorCode.MIXINS_SUPER_CLASS:
   status: needsFix
   notes: |-

pkg/analysis_server/lib/src/services/correction/fix_internal.dart

@@ -1361,6 +1361,10 @@ final _builtInNonLintMultiGenerators = {
     DataDriven.new,
     ImportLibrary.forType,
   ],
+  CompileTimeErrorCode.MIXIN_WITH_NON_CLASS_SUPERCLASS: [
+    CreateClass.new,
+    ImportLibrary.forType,
+  ],
   CompileTimeErrorCode.NEW_WITH_NON_TYPE: [
     CreateClass.new,
     ImportLibrary.forType,

pkg/analysis_server/test/src/services/correction/fix/create_class_test.dart

@@ -304,6 +304,22 @@ void f() {
     await assertNoFix();
   }
 
+  Future<void> test_classContainingWith() async {
+    await resolveTestCode('''
+class B extends A with M {}
+
+mixin M {}
+''');
+    await assertHasFix('''
+class B extends A with M {}
+
+class A {
+}
+
+mixin M {}
+''');
+  }
+
   Future<void> test_extends() async {
     await resolveTestCode('''
 class MyClass extends BaseClass {}

pkg/analysis_server/test/src/services/correction/fix/import_library_project_test.dart

@@ -313,6 +313,24 @@ void f() {
     await assertNoFix();
   }
 
+  Future<void> test_classContainingWith() async {
+    newFile('$testPackageLibPath/lib.dart', '''
+class A {}
+''');
+    await resolveTestCode('''
+class B extends A with M {}
+
+mixin M {}
+''');
+    await assertHasFix('''
+import 'package:test/lib.dart';
+
+class B extends A with M {}
+
+mixin M {}
+''');
+  }
+
   Future<void> test_extension_name() async {
     createAnalysisOptionsFile(lints: [LintNames.comment_references]);
     newFile('$testPackageLibPath/lib.dart', '''