Sort the output (for now just the classes and instance members).

frog/tests/leg/class_order_test.dart

+// Copyright (c) 2011, 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.
+// Test that parameters keep their names in the output.
+
+#import("compiler_helper.dart");
+
+final String TEST_ONE = @"""
+class A { foo() => 499; }
+class B { bar() => 499; }
+class C { gee() => 499; }
+
+void main() {
+  new C().gee();
+  new B().bar();
+  new A().foo();
+}
+""";
+
+final String TEST_TWO = @"""
+class A extends B { foo() => 499; }
+class B extends C { bar() => 499; }
+class C { gee() => 499; }
+
+void main() {
+  new C().gee();
+  new B().bar();
+  new A().foo();
+}
+""";
+
+main() {
+  // Make sure that class A, B and C are emitted in that order. For simplicity
+  // we just verify that their members are in the correct order.
+  RegExp regexp = const RegExp(@"foo\$0?:(.|\n)*bar\$0:(.|\n)*gee\$0:");
+
+  String generated = compileAll(TEST_ONE);
+  print(generated);
+  Expect.isTrue(regexp.hasMatch(generated));
+
+  generated = compileAll(TEST_TWO);
+  Expect.isTrue(regexp.hasMatch(generated));
+}