test for interpolation completions

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 0b242bd91929a49546c509a9982d3f6b6d584a9f..6db05c48f70340931ecb814259cdd75604e3e428 100644
--- a/pkg/analysis_server/test/services/completion/completion_test_util.dart
+++ b/pkg/analysis_server/test/services/completion/completion_test_util.dart
@@ -2215,6 +2215,15 @@ abstract class AbstractSelectorSuggestionTest extends AbstractCompletionTest {
     });
   }
 
+  test_InterpolationExpression_prefix_selector2() {
+    // SimpleIdentifier  PrefixedIdentifier  InterpolationExpression
+    addTestSource('main() {String name; print("hello \$name.^");}');
+    computeFast();
+    return computeFull((bool result) {
+      assertNoSuggestions();
+    });
+  }
+
   test_InterpolationExpression_prefix_target() {
     // SimpleIdentifier  PrefixedIdentifier  InterpolationExpression
     addTestSource('main() {String name; print("hello \${nam^e.length}");}');