[Atom] Issue 424. Fix for 'getNavigation' and index expressions.

pkg/analysis_server/test/analysis/notification_navigation_test.dart

Index: pkg/analysis_server/test/analysis/notification_navigation_test.dart
diff --git a/pkg/analysis_server/test/analysis/notification_navigation_test.dart b/pkg/analysis_server/test/analysis/notification_navigation_test.dart
index 5e66eca77f7f05dc3bd2bbfdfe7f91356e16410c..68b347c18197d2092fccf8bd7d4b3b401c031605 100644
--- a/pkg/analysis_server/test/analysis/notification_navigation_test.dart
+++ b/pkg/analysis_server/test/analysis/notification_navigation_test.dart
@@ -777,8 +777,11 @@ main() {
 }
 ''');
     return prepareNavigation().then((_) {
+      assertHasOperatorRegion('[0', 1, '[](index)', 2);
       assertHasOperatorRegion('] // []', 1, '[](index)', 2);
+      assertHasOperatorRegion('[1', 1, '[]=(index,', 3);
       assertHasOperatorRegion('] = 1;', 1, '[]=(index,', 3);
+      assertHasOperatorRegion('[2', 1, '[]=(index,', 3);
       assertHasOperatorRegion('] += 2;', 1, '[]=(index,', 3);
       assertHasOperatorRegion('+= 2;', 2, '+(other)', 1);
     });