Unit test generic annotation functionality of AstCloner.

The update to AstCloner was made as part of
ba5064f, but it couldn't be unit
tested until now due to the lack of parser support.

Bug: #44838
Change-Id: If2fd5ce41a46c3460b5f90ba854f22ae1baef11c
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/182840
Reviewed-by: Konstantin Shcheglov <scheglov@google.com>
Commit-Queue: Paul Berry <paulberry@google.com>

pkg/analyzer/test/generated/utilities_test.dart

@@ -78,6 +78,13 @@ class AstClonerTest {
     _assertCloneUnitMember('@A.c() main() {}');
   }
 
+  void test_visitAnnotation_constructor_generic() {
+    _assertCloneUnitMember('@A<int>.c() main() {}',
+        featureSet: FeatureSet.forTesting(
+            sdkVersion: '2.12',
+            additionalFeatures: [Feature.generic_metadata]));
+  }
+
   void test_visitAnnotation_withComment() {
     CompilationUnitMember clazz =
         _parseUnitMember('/** comment */ @deprecated class A {}');
@@ -1160,8 +1167,8 @@ library l;''');
     _assertClone(node);
   }
 
-  void _assertCloneUnitMember(String code) {
-    AstNode node = _parseUnitMember(code);
+  void _assertCloneUnitMember(String code, {FeatureSet? featureSet}) {
+    AstNode node = _parseUnitMember(code, featureSet: featureSet);
     _assertClone(node);
   }
 
@@ -1178,10 +1185,10 @@ library l;''');
     return body.block.statements.single;
   }
 
-  CompilationUnit _parseUnit(String code) {
+  CompilationUnit _parseUnit(String code, {FeatureSet? featureSet}) {
     GatheringErrorListener listener = GatheringErrorListener();
     CharSequenceReader reader = CharSequenceReader(code);
-    var featureSet = FeatureSet.forTesting(sdkVersion: '2.2.2');
+    featureSet ??= FeatureSet.forTesting(sdkVersion: '2.2.2');
     Scanner scanner = Scanner(TestSource(), reader, listener)
       ..configureFeatures(
         featureSetForOverriding: featureSet,
@@ -1199,8 +1206,9 @@ library l;''');
     return unit;
   }
 
-  CompilationUnitMember _parseUnitMember(String code) {
-    CompilationUnit unit = _parseUnit(code);
+  CompilationUnitMember _parseUnitMember(String code,
+      {FeatureSet? featureSet}) {
+    CompilationUnit unit = _parseUnit(code, featureSet: featureSet);
     return unit.declarations.single;
   }