Add closure_test

tests/compiler/dart2js/equivalence/id_equivalence_test.dart

Index: tests/compiler/dart2js/equivalence/id_equivalence_test.dart
diff --git a/tests/compiler/dart2js/inference/id_equivalence_test.dart b/tests/compiler/dart2js/equivalence/id_equivalence_test.dart
similarity index 78%
rename from tests/compiler/dart2js/inference/id_equivalence_test.dart
rename to tests/compiler/dart2js/equivalence/id_equivalence_test.dart
index 73e1725f482b760ba5ce8fe9560ed54205edcf95..68730ee638ed1a1c5693d17a4faed19ec6a81f14 100644
--- a/tests/compiler/dart2js/inference/id_equivalence_test.dart
+++ b/tests/compiler/dart2js/equivalence/id_equivalence_test.dart
@@ -11,17 +11,24 @@ import 'package:compiler/src/kernel/kernel.dart';
 import 'package:compiler/src/tree/nodes.dart' as ast;
 import 'package:expect/expect.dart';
 import 'package:kernel/ast.dart' as ir;
-import 'inference_test_helper.dart';
-import 'enumerator.dart';
+import '../equivalence/id_equivalence.dart';
+import '../equivalence/id_equivalence_helper.dart';
+
+const List<String> dataDirectories = const <String>[
+  '../inference/data',
+];
 
 main() {
   asyncTest(() async {
-    Directory dataDir = new Directory.fromUri(Platform.script.resolve('data'));
-    await for (FileSystemEntity entity in dataDir.list()) {
-      print('Checking ${entity.uri}');
-      String annotatedCode = await new File.fromUri(entity.uri).readAsString();
-      await checkCode(annotatedCode, checkMemberEquivalence,
-          options: [Flags.useKernel]);
+    for (String path in dataDirectories) {
+      Directory dataDir = new Directory.fromUri(Platform.script.resolve(path));
+      await for (FileSystemEntity entity in dataDir.list()) {
+        print('Checking ${entity.uri}');
+        String annotatedCode =
+            await new File.fromUri(entity.uri).readAsString();
+        await checkCode(annotatedCode, checkMemberEquivalence,
+            options: [Flags.useKernel]);
+      }
     }
   });
 }