Add summary support for ShowElementCombinator.end and .offset.

pkg/analyzer/test/src/summary/summary_common.dart

 // Copyright (c) 2015, 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 analyzer.test.src.summary.summary_common;
 
 import 'package:analyzer/analyzer.dart';
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/src/dart/scanner/reader.dart';
@@ skipping 4871 matching lines @@
     expect(
         unlinkedUnits[0].publicNamespace.exports[0].combinators, hasLength(1));
     expect(unlinkedUnits[0].publicNamespace.exports[0].combinators[0].shows,
         isEmpty);
     expect(unlinkedUnits[0].publicNamespace.exports[0].combinators[0].hides,
         hasLength(2));
     expect(unlinkedUnits[0].publicNamespace.exports[0].combinators[0].hides[0],
         'Future');
     expect(unlinkedUnits[0].publicNamespace.exports[0].combinators[0].hides[1],
         'Stream');
+    expect(
+        unlinkedUnits[0].publicNamespace.exports[0].combinators[0].offset, 0);
+    expect(unlinkedUnits[0].publicNamespace.exports[0].combinators[0].end, 0);
     expect(linked.exportNames, isNotEmpty);
   }
 
   test_export_names_excludes_names_from_library() {
     addNamedSource('/a.dart', 'part of my.lib; int y; int _y;');
     serializeLibraryText('library my.lib; part "a.dart"; int x; int _x;');
     expect(linked.exportNames, isEmpty);
   }
 
   test_export_no_combinators() {
@@ skipping 72 matching lines @@
 
   test_export_show() {
     addNamedSource('/a.dart', 'f() {} g() {}');
     serializeLibraryText('export "a.dart" show f;');
     expect(linked.exportNames, hasLength(1));
     checkExportName(linked.exportNames[0], absUri('/a.dart'), 'a.dart', 'f',
         ReferenceKind.topLevelFunction);
   }
 
   test_export_show_order() {
-    serializeLibraryText('export "dart:async" show Future, Stream;');
+    String libraryText = 'export "dart:async" show Future, Stream;';
+    serializeLibraryText(libraryText);
     expect(unlinkedUnits[0].publicNamespace.exports, hasLength(1));
     expect(
         unlinkedUnits[0].publicNamespace.exports[0].combinators, hasLength(1));
     expect(unlinkedUnits[0].publicNamespace.exports[0].combinators[0].shows,
         hasLength(2));
     expect(unlinkedUnits[0].publicNamespace.exports[0].combinators[0].hides,
         isEmpty);
     expect(unlinkedUnits[0].publicNamespace.exports[0].combinators[0].shows[0],
         'Future');
     expect(unlinkedUnits[0].publicNamespace.exports[0].combinators[0].shows[1],
         'Stream');
+    expect(unlinkedUnits[0].publicNamespace.exports[0].combinators[0].offset,
+        libraryText.indexOf('show'));
+    expect(unlinkedUnits[0].publicNamespace.exports[0].combinators[0].end,
+        libraryText.indexOf(';'));
   }
 
   test_export_typedef() {
     addNamedSource('/a.dart', 'typedef F();');
     serializeLibraryText('export "a.dart";');
     expect(linked.exportNames, hasLength(1));
     checkExportName(linked.exportNames[0], absUri('/a.dart'), 'a.dart', 'F',
         ReferenceKind.typedef);
   }
 
@@ skipping 314 matching lines @@
   test_import_hide_order() {
     serializeLibraryText(
         'import "dart:async" hide Future, Stream; Completer c;');
     // Second import is the implicit import of dart:core
     expect(unlinkedUnits[0].imports, hasLength(2));
     expect(unlinkedUnits[0].imports[0].combinators, hasLength(1));
     expect(unlinkedUnits[0].imports[0].combinators[0].shows, isEmpty);
     expect(unlinkedUnits[0].imports[0].combinators[0].hides, hasLength(2));
     expect(unlinkedUnits[0].imports[0].combinators[0].hides[0], 'Future');
     expect(unlinkedUnits[0].imports[0].combinators[0].hides[1], 'Stream');
+    expect(unlinkedUnits[0].imports[0].combinators[0].offset, 0);
+    expect(unlinkedUnits[0].imports[0].combinators[0].end, 0);
   }
 
   test_import_implicit() {
     // The implicit import of dart:core is represented in the model.
     serializeLibraryText('');
     expect(unlinkedUnits[0].imports, hasLength(1));
     checkDependency(linked.importDependencies[0], 'dart:core', 'dart:core');
     expect(unlinkedUnits[0].imports[0].uri, isEmpty);
     expect(unlinkedUnits[0].imports[0].uriOffset, 0);
     expect(unlinkedUnits[0].imports[0].uriEnd, 0);
@@ skipping 172 matching lines @@
     String libraryText =
         'import "dart:async" show Future, Stream; Future x; Stream y;';
     serializeLibraryText(libraryText);
     // Second import is the implicit import of dart:core
     expect(unlinkedUnits[0].imports, hasLength(2));
     expect(unlinkedUnits[0].imports[0].combinators, hasLength(1));
     expect(unlinkedUnits[0].imports[0].combinators[0].shows, hasLength(2));
     expect(unlinkedUnits[0].imports[0].combinators[0].hides, isEmpty);
     expect(unlinkedUnits[0].imports[0].combinators[0].shows[0], 'Future');
     expect(unlinkedUnits[0].imports[0].combinators[0].shows[1], 'Stream');
+    expect(unlinkedUnits[0].imports[0].combinators[0].offset,
+        libraryText.indexOf('show'));
+    expect(unlinkedUnits[0].imports[0].combinators[0].end,
+        libraryText.indexOf('; Future'));
   }
 
   test_import_uri() {
     String uriString = '"dart:async"';
     String libraryText = 'import $uriString; Future x;';
     serializeLibraryText(libraryText);
     // Second import is the implicit import of dart:core
     expect(unlinkedUnits[0].imports, hasLength(2));
     expect(unlinkedUnits[0].imports[0].uri, 'dart:async');
   }
@@ skipping 1772 matching lines @@
 class _PrefixExpectation {
   final ReferenceKind kind;
   final String name;
   final String absoluteUri;
   final String relativeUri;
   final int numTypeParameters;
 
   _PrefixExpectation(this.kind, this.name,
       {this.absoluteUri, this.relativeUri, this.numTypeParameters: 0});
 }