Issue 22834. Disable 'Add type annotation' Quick Assist if the type is not accessible.

pkg/analysis_server/test/services/correction/assist_test.dart

Index: pkg/analysis_server/test/services/correction/assist_test.dart
diff --git a/pkg/analysis_server/test/services/correction/assist_test.dart b/pkg/analysis_server/test/services/correction/assist_test.dart
index 15f68bec5db38cfa78c3cdebf772b9fc7d6b64ce..16feba7e7854d74182a450836bf20967af070e7a 100644
--- a/pkg/analysis_server/test/services/correction/assist_test.dart
+++ b/pkg/analysis_server/test/services/correction/assist_test.dart
@@ -97,6 +97,57 @@ class AssistProcessorTest extends AbstractSingleUnitTest {
     length = 0;
   }
 
+  void test_addTypeAnnotation_BAD_privateType_closureParameter() {
+    addSource('/my_lib.dart', '''
+library my_lib;
+class A {}
+class _B extends A {}
+foo(f(_B p)) {}
+''');
+    resolveTestUnit('''
+import 'my_lib.dart';
+main() {
+  foo((test) {});
+}
+ ''');
+    assertNoAssistAt('test)', AssistKind.ADD_TYPE_ANNOTATION);
+  }
+
+  void test_addTypeAnnotation_BAD_privateType_declaredIdentifier() {
+    addSource('/my_lib.dart', '''
+library my_lib;
+class A {}
+class _B extends A {}
+List<_B> getValues() => [];
+''');
+    resolveTestUnit('''
+import 'my_lib.dart';
+class A<T> {
+  main() {
+    for (var item in getValues()) {
+    }
+  }
+}
+''');
+    assertNoAssistAt('var item', AssistKind.ADD_TYPE_ANNOTATION);
+  }
+
+  void test_addTypeAnnotation_BAD_privateType_variable() {
+    addSource('/my_lib.dart', '''
+library my_lib;
+class A {}
+class _B extends A {}
+_B getValue() => new _B();
+''');
+    resolveTestUnit('''
+import 'my_lib.dart';
+main() {
+  var v = getValue();
+}
+''');
+    assertNoAssistAt('var ', AssistKind.ADD_TYPE_ANNOTATION);
+  }
+
   void test_addTypeAnnotation_classField_OK_final() {
     resolveTestUnit('''
 class A {
@@ -520,6 +571,23 @@ main() {
     assertNoAssistAt('var ', AssistKind.ADD_TYPE_ANNOTATION);
   }
 
+  void test_addTypeAnnotation_OK_privateType_sameLibrary() {
+    resolveTestUnit('''
+class _A {}
+_A getValue() => new _A();
+main() {
+  var v = getValue();
+}
+''');
+    assertHasAssistAt('var ', AssistKind.ADD_TYPE_ANNOTATION, '''
+class _A {}
+_A getValue() => new _A();
+main() {
+  _A v = getValue();
+}
+''');
+  }
+
   void test_addTypeAnnotation_parameter_BAD_hasExplicitType() {
     resolveTestUnit('''
 foo(f(int p)) {}