[wasm] Instance exports object should be iterable

test/mjsunit/regress/wasm/regression-5863.js

Index: test/mjsunit/regress/wasm/regression-5863.js
diff --git a/test/mjsunit/regress/wasm/regression-5863.js b/test/mjsunit/regress/wasm/regression-5863.js
new file mode 100644
index 0000000000000000000000000000000000000000..df9dcbade68604430656f15367c53b21ce2968d1
--- /dev/null
+++ b/test/mjsunit/regress/wasm/regression-5863.js
@@ -0,0 +1,25 @@
+// Copyright 2017 the V8 project authors. All rights reserved.

[titzer, 2017/01/20 09:12:02]

Can you move this file into test/mjsunit/wasm ?

It's more of a feature test than a regression test.

[gdeepti, 2017/01/20 18:12:10]

Moved to test/mjsunit/wasm/instantiate-module-basic.js. 

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --expose-wasm
+
+load("test/mjsunit/wasm/wasm-constants.js");
+load("test/mjsunit/wasm/wasm-module-builder.js");
+
+(function TestIterableExports() {
+  let builder = new WasmModuleBuilder;
+  builder.addExport("a", builder.addFunction("", kSig_v_v).addBody([]));
+  builder.addExport("b", builder.addFunction("", kSig_v_v).addBody([]));
+  builder.addExport("c", builder.addFunction("", kSig_v_v).addBody([]));
+  builder.addExport("d", builder.addFunction("", kSig_v_v).addBody([]));
+  builder.addExport("e", builder.addGlobal(kWasmI32, false));
+
+  let module = new WebAssembly.Module(builder.toBuffer());
+  let instance = new WebAssembly.Instance(module);
+
+  let exports_count = 0;
+  for (var e in instance.exports) ++exports_count;
+
+  assertEquals(5, exports_count);
+})();