cps-ir: Add a test for codegeneration.

tests/compiler/dart2js/js_backend_cps_ir_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.
+// VMOptions=-DUSE_CPS_IR=true
+
+// Test that the CPS IR code generator is able to compile the provided
+// example programs.
+
+import 'package:async_helper/async_helper.dart';
+import 'package:expect/expect.dart';
+import 'package:compiler/src/apiimpl.dart'
+       show Compiler;
+import 'memory_compiler.dart';
+
+const String TEST_MAIN_FILE = 'test.dart';
+
+/// The list of tests to run.
+const List<String> RAW_TESTS = const [
+  "main() {}",
+  "main() { return 42; }",
+];
+
+String formatTest(Map test) {
+  return test[TEST_MAIN_FILE];
+}
+
+main() {
+  Expect.isTrue(const bool.fromEnvironment("USE_CPS_IR"));
+
+  Iterable<Map> tests =
+    RAW_TESTS.map((String text) => {TEST_MAIN_FILE: text});
+
+  for (Map test in tests) {
+    asyncTest(() {
+      Compiler compiler = compilerFor(test);
+      Uri uri = Uri.parse('memory:$TEST_MAIN_FILE');
+      return compiler.run(uri).then((_) {
+        Expect.isNotNull(compiler.assembledCode);
+      }).catchError((e) {
+        Expect.fail('The following test failed to compile:\n'
+                    '${formatTest(test)}');
+      });
+    });
+  }
+}