Record HAS_ANCESTOR relations into index.

pkg/analysis_server/test/services/index/dart_index_contributor_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.src.index.dart_index_contributor;
 
 import 'package:analysis_server/analysis/index_core.dart';
 import 'package:analysis_server/src/services/index/index.dart';
 import 'package:analysis_server/src/services/index/index_contributor.dart';
 import 'package:analysis_server/src/services/index/index_store.dart';
@@ skipping 143 matching lines @@
   }
 }''');
     // prepare elements
     Element mainElement = findElement("main");
     VariableElement variableElement = findElement("v");
     // verify
     _assertNoRecordedRelationForElement(variableElement,
         IndexConstants.IS_READ_BY, _expectedLocation(mainElement, 'v in []'));
   }
 
+  void test_hasAncestor_ClassDeclaration() {
+    _indexTestUnit('''
+class A {}
+class B1 extends A {}
+class B2 implements A {}
+class C1 extends B1 {}
+class C2 extends B2 {}
+class C3 implements B1 {}
+class C4 implements B2 {}
+class M extends Object with A {}
+''');
+    // prepare elements
+    ClassElement classElementA = findElement("A");
+    ClassElement classElementB1 = findElement("B1");
+    ClassElement classElementB2 = findElement("B2");
+    ClassElement classElementC1 = findElement("C1");
+    ClassElement classElementC2 = findElement("C2");
+    ClassElement classElementC3 = findElement("C3");
+    ClassElement classElementC4 = findElement("C4");
+    ClassElement classElementM = findElement("M");
+    // verify
+    _assertRecordedRelationForElement(
+        classElementA,
+        IndexConstants.HAS_ANCESTOR,
+        _expectedLocation(classElementB1, 'B1 extends A'));
+    _assertRecordedRelationForElement(
+        classElementA,
+        IndexConstants.HAS_ANCESTOR,
+        _expectedLocation(classElementB2, 'B2 implements A'));
+    _assertRecordedRelationForElement(
+        classElementA,
+        IndexConstants.HAS_ANCESTOR,
+        _expectedLocation(classElementC1, 'C1 extends B1'));
+    _assertRecordedRelationForElement(
+        classElementA,
+        IndexConstants.HAS_ANCESTOR,
+        _expectedLocation(classElementC2, 'C2 extends B2'));
+    _assertRecordedRelationForElement(
+        classElementA,
+        IndexConstants.HAS_ANCESTOR,
+        _expectedLocation(classElementC3, 'C3 implements B1'));
+    _assertRecordedRelationForElement(
+        classElementA,
+        IndexConstants.HAS_ANCESTOR,
+        _expectedLocation(classElementC4, 'C4 implements B2'));
+    _assertRecordedRelationForElement(
+        classElementA,
+        IndexConstants.HAS_ANCESTOR,
+        _expectedLocation(classElementM, 'M extends Object with A'));
+  }
+
+  void test_hasAncestor_ClassTypeAlias() {
+    _indexTestUnit('''
+class A {}
+class B extends A {}
+class C1 = Object with A;
+class C2 = Object with B;
+''');
+    // prepare elements
+    ClassElement classElementA = findElement("A");
+    ClassElement classElementB = findElement("B");
+    ClassElement classElementC1 = findElement("C1");
+    ClassElement classElementC2 = findElement("C2");
+    // verify
+    _assertRecordedRelationForElement(
+        classElementA,
+        IndexConstants.HAS_ANCESTOR,
+        _expectedLocation(classElementC1, 'C1 = Object with A'));
+    _assertRecordedRelationForElement(
+        classElementA,
+        IndexConstants.HAS_ANCESTOR,
+        _expectedLocation(classElementC2, 'C2 = Object with B'));
+    _assertRecordedRelationForElement(
+        classElementB,
+        IndexConstants.HAS_ANCESTOR,
+        _expectedLocation(classElementC2, 'C2 = Object with B'));
+  }
+
   void test_IndexableName_field() {
     _indexTestUnit('''
 class A {
   int field;
 }
 main(A a, p) {
   print(a.field); // r
   print(p.field); // ur
   {
     var field = 42;
@@ skipping 1471 matching lines @@
   RecordedRelation(this.indexable, this.relationship, this.location);
 
   @override
   String toString() {
     return 'RecordedRelation(indexable=$indexable; relationship=$relationship; '
         'location=$location; flags='
         '${location.isQualified ? "Q" : ""}'
         '${location.isResolved ? "R" : ""})';
   }
 }