Report unused function type aliases.

pkg/analyzer/test/generated/resolver_test.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library engine.resolver_test;
 
 import 'dart:collection';
 
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
@@ skipping 3243 matching lines @@
   void test_unnecessaryTypeCheck_type_not_object() {
     Source source = addSource(r'''
 m(i) {
   bool b = i is! Object;
 }''');
     resolve(source);
     assertErrors(source, [HintCode.UNNECESSARY_TYPE_CHECK_FALSE]);
     verify([source]);
   }
 
-  void test_unusedElement_class_inClassMember() {
-    enableUnusedElement = true;
-    Source source = addSource(r'''
-class _A {
-  static staticMethod() {
-    new _A();
-  }
-  instanceMethod() {
-    new _A();
-  }
-}
-''');
-    resolve(source);
-    assertErrors(source, [HintCode.UNUSED_ELEMENT]);
-    verify([source]);
-  }
-
-  void test_unusedElement_class_inConstructorName() {
-    enableUnusedElement = true;
-    Source source = addSource(r'''
-class _A {
-  _A() {}
-  _A.named() {}
-}
-''');
-    resolve(source);
-    assertErrors(source, [HintCode.UNUSED_ELEMENT]);
-    verify([source]);
-  }
-
-  void test_unusedElement_class_isExpression() {
-    enableUnusedElement = true;
-    Source source = addSource(r'''
-class _A {}
-main(p) {
-  if (p is _A) {
-  }
-}
-''');
-    resolve(source);
-    assertErrors(source, [HintCode.UNUSED_ELEMENT]);
-    verify([source]);
-  }
-
   void test_unusedElement_class_isUsed_extends() {
     enableUnusedElement = true;
     Source source = addSource(r'''
 class _A {}
 class B extends _A {}
 ''');
     resolve(source);
     assertNoErrors(source);
     verify([source]);
   }
@@ skipping 42 matching lines @@
   static m() {}
 }
 main() {
   _A.m();
 }''');
     resolve(source);
     assertNoErrors(source);
     verify([source]);
   }
 
-  void test_unusedElement_class_noReference() {
+  void test_unusedElement_class_notUsed_inClassMember() {
+    enableUnusedElement = true;
+    Source source = addSource(r'''
+class _A {
+  static staticMethod() {
+    new _A();
+  }
+  instanceMethod() {
+    new _A();
+  }
+}
+''');
+    resolve(source);
+    assertErrors(source, [HintCode.UNUSED_ELEMENT]);
+    verify([source]);
+  }
+
+  void test_unusedElement_class_notUsed_inConstructorName() {
+    enableUnusedElement = true;
+    Source source = addSource(r'''
+class _A {
+  _A() {}
+  _A.named() {}
+}
+''');
+    resolve(source);
+    assertErrors(source, [HintCode.UNUSED_ELEMENT]);
+    verify([source]);
+  }
+
+  void test_unusedElement_class_notUsed_isExpression() {
     enableUnusedElement = true;
     Source source = addSource(r'''
 class _A {}
+main(p) {
+  if (p is _A) {
+  }
+}
+''');
+    resolve(source);
+    assertErrors(source, [HintCode.UNUSED_ELEMENT]);
+    verify([source]);
+  }
+
+  void test_unusedElement_class_notUsed_noReference() {
+    enableUnusedElement = true;
+    Source source = addSource(r'''
+class _A {}
 main() {
 }''');
     resolve(source);
     assertErrors(source, [HintCode.UNUSED_ELEMENT]);
     verify([source]);
   }
 
-  void test_unusedElement_class_variableDeclaration() {
+  void test_unusedElement_class_notUsed_variableDeclaration() {
     enableUnusedElement = true;
     Source source = addSource(r'''
 class _A {}
 main() {
   _A v;
   print(v);
 }
 print(x) {}
 ''');
     resolve(source);
     assertErrors(source, [HintCode.UNUSED_ELEMENT]);
     verify([source]);
   }
 
+  void test_unusedElement_enum_isUsed_fieldReference() {
+    enableUnusedElement = true;
+    Source source = addSource(r'''
+enum _MyEnum {A, B, C}
+main() {
+  print(_MyEnum.B);
+}''');
+    resolve(source);
+    assertNoErrors(source);
+    verify([source]);
+  }
+
+  void test_unusedElement_enum_notUsed_noReference() {
+    enableUnusedElement = true;
+    Source source = addSource(r'''
+enum _MyEnum {A, B, C}
+main() {
+}''');
+    resolve(source);
+    assertErrors(source, [HintCode.UNUSED_ELEMENT]);
+    verify([source]);
+  }
+
   void test_unusedElement_functionLocal_isUsed_closure() {
     enableUnusedElement = true;
     Source source = addSource(r'''
 main() {
   print(() {});
 }
 print(x) {}
 ''');
     resolve(source);
     assertNoErrors(source);
@@ skipping 93 matching lines @@
 _f(int p) {
   _f(p - 1);
 }
 main() {
 }''');
     resolve(source);
     assertErrors(source, [HintCode.UNUSED_ELEMENT]);
     verify([source]);
   }
 
+  void test_unusedElement_functionTypeAlias_isUsed_reference() {
+    enableUnusedElement = true;
+    Source source = addSource(r'''
+typedef _F(a, b);
+main(_F f) {
+}''');
+    resolve(source);
+    assertNoErrors(source);
+    verify([source]);
+  }
+
+  void test_unusedElement_functionTypeAlias_isUsed_variableDeclaration() {
+    enableUnusedElement = true;
+    Source source = addSource(r'''
+typedef _F(a, b);
+class A {
+  _F f;
+}''');
+    resolve(source);
+    assertNoErrors(source);
+    verify([source]);
+  }
+
+  void test_unusedElement_functionTypeAlias_notUsed_noReference() {
+    enableUnusedElement = true;
+    Source source = addSource(r'''
+typedef _F(a, b);
+main() {
+}''');
+    resolve(source);
+    assertErrors(source, [HintCode.UNUSED_ELEMENT]);
+    verify([source]);
+  }
+
   void test_unusedElement_getter_isUsed_invocation_implicitThis() {
     enableUnusedElement = true;
     Source source = addSource(r'''
 class A {
   get _g => null;
   useGetter() {
     var v = _g;
   }
 }''');
     resolve(source);
@@ skipping 10128 matching lines @@
         // check propagated type
         FunctionType propagatedType = node.propagatedType as FunctionType;
         expect(propagatedType.returnType, test.typeProvider.stringType);
       } on AnalysisException catch (e, stackTrace) {
         thrownException[0] = new CaughtException(e, stackTrace);
       }
     }
     return null;
   }
 }