Issue 13783. Add file from missing import.

pkg/analysis_server/test/services/correction/fix_test.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library test.services.correction.fix;
 
 import 'package:analysis_server/src/protocol.dart' hide AnalysisError;
 import 'package:analysis_server/src/services/correction/fix.dart';
 import 'package:analysis_server/src/services/index/index.dart';
 import 'package:analysis_server/src/services/index/local_memory_index.dart';
@@ skipping 377 matching lines @@
   }
 
   method() {}
 }
 main() {
   new A.named(1, 2.0);
 }
 ''');
   }
 
+  void test_createFile_forImport() {
+    testFile = '/my/project/bin/test.dart';
+    _indexTestUnit('''
+import 'my_file.dart';
+''');
+    AnalysisError error = _findErrorToFix();
+    fix = _assertHasFix(FixKind.CREATE_FILE, error);
+    change = fix.change;
+    // validate change
+    List<SourceFileEdit> fileEdits = change.edits;
+    expect(fileEdits, hasLength(1));
+    SourceFileEdit fileEdit = change.edits[0];
+    expect(fileEdit.file, '/my/project/bin/my_file.dart');
+    expect(fileEdit.fileStamp, -1);
+    expect(fileEdit.edits[0].replacement, contains('library my.file;'));
+  }
+
   void test_createMissingOverrides_functionType() {
     _indexTestUnit('''
 abstract class A {
   forEach(int f(double p1, String p2));
 }
 
 class B extends A {
 }
 ''');
     assertHasFix(FixKind.CREATE_MISSING_OVERRIDES, '''
@@ skipping 1583 matching lines @@
       positions.add(new Position(testFile, offset));
     }
     return positions;
   }
 
   void _indexTestUnit(String code) {
     resolveTestUnit(code);
     index.indexUnit(context, testUnit);
   }
 }