Add support for assert statements with messages to the analyzer.

pkg/analyzer/test/generated/utilities_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.utilities_test;
 
 import 'dart:collection';
 
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/java_core.dart';
@@ skipping 2091 matching lines @@
   @override
   Expression get(AsExpression node) => node.expression;
 }
 
 class Getter_NodeReplacerTest_test_assertStatement
     implements NodeReplacerTest_Getter {
   @override
   Expression get(AssertStatement node) => node.condition;
 }
 
+class Getter_NodeReplacerTest_test_assertStatement_2
+    implements NodeReplacerTest_Getter {
+  @override
+  Expression get(AssertStatement node) => node.message;
+}
+
 class Getter_NodeReplacerTest_test_assignmentExpression
     implements NodeReplacerTest_Getter {
   @override
   Expression get(AssignmentExpression node) => node.rightHandSide;
 }
 
 class Getter_NodeReplacerTest_test_assignmentExpression_2
     implements NodeReplacerTest_Getter {
   @override
   Expression get(AssignmentExpression node) => node.leftHandSide;
@@ skipping 1331 matching lines @@
   void test_asExpression() {
     AsExpression node = AstFactory.asExpression(
         AstFactory.integer(0),
         AstFactory.typeName3(
             AstFactory.identifier3("a"), [AstFactory.typeName4("C")]));
     _assertReplace(node, new Getter_NodeReplacerTest_test_asExpression_2());
     _assertReplace(node, new Getter_NodeReplacerTest_test_asExpression());
   }
 
   void test_assertStatement() {
-    AssertStatement node =
-        AstFactory.assertStatement(AstFactory.booleanLiteral(true));
+    AssertStatement node = AstFactory.assertStatement(
+        AstFactory.booleanLiteral(true), AstFactory.string2('foo'));
     _assertReplace(node, new Getter_NodeReplacerTest_test_assertStatement());
+    _assertReplace(node, new Getter_NodeReplacerTest_test_assertStatement_2());
   }
 
   void test_assignmentExpression() {
     AssignmentExpression node = AstFactory.assignmentExpression(
         AstFactory.identifier3("l"), TokenType.EQ, AstFactory.identifier3("r"));
     _assertReplace(
         node, new Getter_NodeReplacerTest_test_assignmentExpression_2());
     _assertReplace(
         node, new Getter_NodeReplacerTest_test_assignmentExpression());
   }
@@ skipping 1352 matching lines @@
   }
 
   void test_get_added() {
     TokenMap tokenMap = new TokenMap();
     Token key = TokenFactory.tokenFromType(TokenType.AT);
     Token value = TokenFactory.tokenFromType(TokenType.AT);
     tokenMap.put(key, value);
     expect(tokenMap.get(key), same(value));
   }
 }