Fix for issue 20125 - improved error messages

pkg/analyzer/test/generated/static_warning_code_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 engine.static_warning_code_test;
 
 import 'package:analyzer/src/generated/source_io.dart';
 import 'package:analyzer/src/generated/error.dart';
 import 'package:analyzer/src/generated/parser.dart' show ParserErrorCode;
 import 'package:unittest/unittest.dart';
@@ skipping 1098 matching lines @@
     Source source = addSource(r'''
 class A<T> {
   const A();
 }
 var m = {const A<int>(): 0, const A<num>(): 1};''');
     resolve(source);
     assertNoErrors(source);
     verify([source]);
   }
 
-  void test_exportDuplicatedLibraryName() {
+  void test_exportDuplicatedLibraryNamed() {
     Source source = addSource(r'''
 library test;
 export 'lib1.dart';
 export 'lib2.dart';''');
     addNamedSource("/lib1.dart", "library lib;");
     addNamedSource("/lib2.dart", "library lib;");
     resolve(source);
-    assertErrors(source, [StaticWarningCode.EXPORT_DUPLICATED_LIBRARY_NAME]);
+    assertErrors(source, [StaticWarningCode.EXPORT_DUPLICATED_LIBRARY_NAMED]);
     verify([source]);
   }
 
+  void test_exportDuplicatedLibraryUnnamed() {
+    Source source = addSource(r'''
+library test;
+export 'lib1.dart';
+export 'lib2.dart';''');
+    addNamedSource("/lib1.dart", "");
+    addNamedSource("/lib2.dart", "");
+    resolve(source);
+    assertErrors(source, [StaticWarningCode.EXPORT_DUPLICATED_LIBRARY_UNNAMED]);
+    verify([source]);
+  }
+
   void test_extraPositionalArguments() {
     Source source = addSource(r'''
 f() {}
 main() {
   f(0, 1, '2');
 }''');
     resolve(source);
     assertErrors(source, [StaticWarningCode.EXTRA_POSITIONAL_ARGUMENTS]);
     verify([source]);
   }
@@ skipping 144 matching lines @@
     Source source = addSource(r'''
 abstract class A implements Function {
 }
 class B implements A {
 }''');
     resolve(source);
     assertErrors(source, [StaticWarningCode.FUNCTION_WITHOUT_CALL]);
     verify([source]);
   }
 
-  void test_importDuplicatedLibraryName() {
+  void test_importDuplicatedLibraryNamed() {
     Source source = addSource(r'''
 library test;
 import 'lib1.dart';
 import 'lib2.dart';''');
     addNamedSource("/lib1.dart", "library lib;");
     addNamedSource("/lib2.dart", "library lib;");
     resolve(source);
     assertErrors(source, [
-        StaticWarningCode.IMPORT_DUPLICATED_LIBRARY_NAME,
+        StaticWarningCode.IMPORT_DUPLICATED_LIBRARY_NAMED,
         HintCode.UNUSED_IMPORT,
         HintCode.UNUSED_IMPORT]);
     verify([source]);
+  }
+
+  void test_importDuplicatedLibraryUnnamed() {
+    Source source = addSource(r'''
+library test;
+import 'lib1.dart';
+import 'lib2.dart';''');
+    addNamedSource("/lib1.dart", "");
+    addNamedSource("/lib2.dart", "");
+    resolve(source);
+    assertErrors(source, [
+        StaticWarningCode.IMPORT_DUPLICATED_LIBRARY_UNNAMED,
+        HintCode.UNUSED_IMPORT,
+        HintCode.UNUSED_IMPORT]);
+    verify([source]);
   }
 
   void test_importOfNonLibrary() {
     resolveWithAndWithoutExperimental(<String> [
         r'''
 part of lib;
 class A {}''',
         r'''
 library lib;
 import 'lib1.dart' deferred as p;
@@ skipping 1961 matching lines @@
 }''');
     resolve(source);
     assertErrors(source, [StaticWarningCode.VOID_RETURN_FOR_GETTER]);
   }
 }
 
 main() {
   groupSep = ' | ';
   runReflectiveTests(StaticWarningCodeTest);
 }