Report HintCode.UNUSED_ELEMENT for functions.

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/java_core.dart';
 import 'package:analyzer/src/generated/java_engine.dart';
 import 'package:analyzer/src/generated/java_engine_io.dart';
@@ skipping 3317 matching lines @@
   static m() {}
 }
 main() {
   _A.m();
 }''');
     resolve(source);
     assertNoErrors(source);
     verify([source]);
   }
 
+  void test_unusedElement_functionLocal_notUsed_noReference() {
+    enableUnusedElement = true;
+    Source source = addSource(r'''
+main() {
+  f() {}
+}''');
+    resolve(source);
+    assertErrors(source, [HintCode.UNUSED_ELEMENT]);
+    verify([source]);
+  }
+
+  void test_unusedElement_functionLocal_notUsed_referenceFromItself() {
+    enableUnusedElement = true;
+    Source source = addSource(r'''
+main() {
+  _f(int p) {
+    _f(p - 1);
+  }
+}''');
+    resolve(source);
+    assertErrors(source, [HintCode.UNUSED_ELEMENT]);
+    verify([source]);
+  }
+
+  void test_unusedElement_functionLocal_isUsed_invocation() {
+    enableUnusedElement = true;
+    Source source = addSource(r'''
+main() {
+  f() {}
+  f();
+}''');
+    resolve(source);
+    assertNoErrors(source);
+    verify([source]);
+  }
+
+  void test_unusedElement_functionLocal_isUsed_reference() {
+    enableUnusedElement = true;
+    Source source = addSource(r'''
+main() {
+  f() {}
+  print(f);
+}
+print(x) {}
+''');
+    resolve(source);
+    assertNoErrors(source);
+    verify([source]);
+  }
+
+  void test_unusedElement_functionLocal_isUsed_closure() {
+    enableUnusedElement = true;
+    Source source = addSource(r'''
+main() {
+  print(() {});
+}
+print(x) {}
+''');
+    resolve(source);
+    assertNoErrors(source);
+    verify([source]);
+  }
+
+  void test_unusedElement_functionTop_notUsed_noReference() {
+    enableUnusedElement = true;
+    Source source = addSource(r'''
+_f() {}
+main() {
+}''');
+    resolve(source);
+    assertErrors(source, [HintCode.UNUSED_ELEMENT]);
+    verify([source]);
+  }
+
+  void test_unusedElement_functionTop_notUsed_referenceFromItself() {
+    enableUnusedElement = true;
+    Source source = addSource(r'''
+_f(int p) {
+  _f(p - 1);
+}
+main() {
+}''');
+    resolve(source);
+    assertErrors(source, [HintCode.UNUSED_ELEMENT]);
+    verify([source]);
+  }
+
+  void test_unusedElement_functionTop_isUsed_invocation() {
+    enableUnusedElement = true;
+    Source source = addSource(r'''
+_f() {}
+main() {
+  _f();
+}''');
+    resolve(source);
+    assertNoErrors(source);
+    verify([source]);
+  }
+
+  void test_unusedElement_functionTop_isUsed_reference() {
+    enableUnusedElement = true;
+    Source source = addSource(r'''
+_f() {}
+main() {
+  print(_f);
+}
+print(x) {}
+''');
+    resolve(source);
+    assertNoErrors(source);
+    verify([source]);
+  }
+
   void test_unusedElement_getter_notUsed_noReference() {
     enableUnusedElement = true;
     Source source = addSource(r'''
 class A {
   get _g => null;
 }''');
     resolve(source);
     assertErrors(source, [HintCode.UNUSED_ELEMENT]);
     verify([source]);
   }
@@ skipping 9082 matching lines @@
   runReflectiveTests(TypeResolverVisitorTest);
   runReflectiveTests(CheckedModeCompileTimeErrorCodeTest);
   runReflectiveTests(ErrorResolverTest);
   runReflectiveTests(HintCodeTest);
   runReflectiveTests(MemberMapTest);
   runReflectiveTests(NonHintCodeTest);
   runReflectiveTests(SimpleResolverTest);
   runReflectiveTests(StrictModeTest);
   runReflectiveTests(TypePropagationTest);
 }