Issue 26063. Index declarations in even partically analyzed units.

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

 // Copyright (c) 2016, 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.
 
 import 'dart:convert';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/src/summary/format.dart';
 import 'package:analyzer/src/summary/idl.dart';
@@ skipping 81 matching lines @@
   int set s (_) {}
 }''');
     _assertDefinedName('s', IndexNameKind.classMember, 's (_) {}');
   }
 
   void test_definedName_topLevel_class() {
     _indexTestUnit('class A {}');
     _assertDefinedName('A', IndexNameKind.topLevel, 'A {}');
   }
 
+  void test_definedName_topLevel_class2() {
+    _indexTestUnit('class A {}', declOnly: true);
+    _assertDefinedName('A', IndexNameKind.topLevel, 'A {}');
+  }
+
   void test_definedName_topLevel_classAlias() {
     _indexTestUnit('''
 class M {}
 class C = Object with M;''');
     _assertDefinedName('C', IndexNameKind.topLevel, 'C =');
   }
 
   void test_definedName_topLevel_enum() {
     _indexTestUnit('enum E {a, b, c}');
     _assertDefinedName('E', IndexNameKind.topLevel, 'E {');
@@ skipping 1050 matching lines @@
     }
     _failWithIndexDump('Unit $unitElement of $element is not referenced');
     return -1;
   }
 
   int _getUriId(Uri uri) {
     String str = uri.toString();
     return _getStringId(str);
   }
 
-  void _indexTestUnit(String code) {
+  void _indexTestUnit(String code, {bool declOnly: false}) {
     resolveTestUnit(code);
     PackageIndexAssembler assembler = new PackageIndexAssembler();
-    assembler.index(testUnit);
+    if (declOnly) {
+      assembler.indexDeclarations(testUnit);
+    } else {
+      assembler.indexUnit(testUnit);
+    }
     // assemble, write and read
     PackageIndexBuilder indexBuilder = assembler.assemble();
     List<int> indexBytes = indexBuilder.toBuffer();
     packageIndex = new PackageIndex.fromBuffer(indexBytes);
     // prepare the only unit index
     expect(packageIndex.units, hasLength(1));
     unitIndex = packageIndex.units[0];
     expect(unitIndex.unit, _getUnitId(testUnitElement));
   }
 }
@@ skipping 94 matching lines @@
   final bool isQualified;
 
   _Relation(this.kind, this.offset, this.length, this.isQualified);
 
   @override
   String toString() {
     return '_Relation{kind: $kind, offset: $offset, length: $length, '
         'isQualified: $isQualified}';
   }
 }