do not suggest completions for empty dot target

pkg/analysis_server/test/services/completion/completion_test_util.dart

Index: pkg/analysis_server/test/services/completion/completion_test_util.dart
diff --git a/pkg/analysis_server/test/services/completion/completion_test_util.dart b/pkg/analysis_server/test/services/completion/completion_test_util.dart
index 0e350d535b5fd1465fce39e5e4a809819b41b40f..00710029f12a31ebb8bc16f2dc83f755c1498a0a 100644
--- a/pkg/analysis_server/test/services/completion/completion_test_util.dart
+++ b/pkg/analysis_server/test/services/completion/completion_test_util.dart
@@ -3498,6 +3498,26 @@ abstract class AbstractSelectorSuggestionTest extends AbstractCompletionTest {
     });
   }
 
+  test_PropertyAccess_noTarget() {
+    // SimpleIdentifier  PropertyAccess  ExpressionStatement
+    addSource('/testAB.dart', 'class Foo { }');
+    addTestSource('class C {foo(){.^}}');
+    computeFast();
+    return computeFull((bool result) {
+      assertNoSuggestions();
+    });
+  }
+
+  test_PropertyAccess_noTarget2() {
+    // SimpleIdentifier  PropertyAccess  ExpressionStatement
+    addSource('/testAB.dart', 'class Foo { }');
+    addTestSource('main() {.^}');
+    computeFast();
+    return computeFull((bool result) {
+      assertNoSuggestions();
+    });
+  }
+
   test_PropertyAccess_selector() {
     // SimpleIdentifier  PropertyAccess  ExpressionStatement  Block
     addTestSource('class A {a() {"hello".length.^}}');