Run AssistProcessor tests with the new analysis driver.

pkg/analysis_server/test/abstract_single_unit.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 test.services.src.index.abstract_single_file;
 
 import 'dart:async';
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/error/error.dart';
 import 'package:analyzer/src/dart/ast/utilities.dart';
+import 'package:analyzer/src/dart/error/hint_codes.dart';
 import 'package:analyzer/src/generated/java_engine.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:test/test.dart';
 
 import 'abstract_context.dart';
 
 class AbstractSingleUnitTest extends AbstractContextTest {
   bool verifyNoTestUnitErrors = true;
 
   String testCode;
   String testFile = '/test.dart';
   Source testSource;
   CompilationUnit testUnit;
   CompilationUnitElement testUnitElement;
   LibraryElement testLibraryElement;
 
   void addTestSource(String code, [Uri uri]) {
     testCode = code;
     testSource = addSource(testFile, code, uri);
   }
 
-  void assertNoErrorsInSource(Source source) {
-    List<AnalysisError> errors = context.getErrors(source).errors;
-    expect(errors, isEmpty);
-  }
-
   Element findElement(String name, [ElementKind kind]) {
     return findChildElement(testUnitElement, name, kind);
   }
 
   int findEnd(String search) {
     return findOffset(search) + search.length;
   }
 
   /**
    * Returns the [SimpleIdentifier] at the given search pattern.
@@ skipping 46 matching lines @@
         length++;
         continue;
       }
       break;
     }
     return length;
   }
 
   Future<Null> resolveTestUnit(String code) async {
     addTestSource(code);
-    testUnit = await resolveLibraryUnit(testSource);
-    if (verifyNoTestUnitErrors) {
-      assertNoErrorsInSource(testSource);
+    if (enableNewAnalysisDriver) {
+      var result = await driver.getResult(testFile);
+      testUnit = (result).unit;
+      if (verifyNoTestUnitErrors) {
+        expect(result.errors.where((AnalysisError error) {
+          return
+            error.errorCode != HintCode.DEAD_CODE &&
+            error.errorCode != HintCode.UNUSED_CATCH_CLAUSE &&
+              error.errorCode != HintCode.UNUSED_CATCH_STACK &&
+              error.errorCode != HintCode.UNUSED_ELEMENT &&
+              error.errorCode != HintCode.UNUSED_FIELD &&
+              error.errorCode != HintCode.UNUSED_IMPORT &&
+              error.errorCode != HintCode.UNUSED_LOCAL_VARIABLE;

[Brian Wilkerson, 2017/01/06 00:01:40]

Why do we need to filter here when we don't need to filter with the old driver?

[scheglov, 2017/01/06 00:03:28]

The old driver does not generate hints.

[Brian Wilkerson, 2017/01/06 00:07:37]

Perhaps a comment to that effect? And it might be better to just filter out all
instances of HintCode rather than a subset in order to future-proof the tests.

+        }), isEmpty);
+      }
+    } else {
+      testUnit = await resolveLibraryUnit(testSource);
+      if (verifyNoTestUnitErrors) {
+        expect(context.getErrors(testSource).errors, isEmpty);
+      }
     }
     testUnitElement = testUnit.element;
     testLibraryElement = testUnitElement.library;
   }
 }