2 files changed, 31 insertions, 1 deletions
diff --git a/src/js/binaryen.idl b/src/js/binaryen.idl
index 3f4f82149..c99bb18e7 100644
--- a/src/js/binaryen.idl
+++ b/src/js/binaryen.idl
@@ -42,6 +42,16 @@ interface LiteralList {
 // S-Expressions
 
 interface Element {
+  boolean isList();
+  boolean isStr();
+  void dump();
+
+  // list methods
+  [Operator="[]"] Element getChild(long i);
+  long size();
+
+  // string methods
+  [Const] DOMString c_str();
 };
 
 interface SExpressionParser {
@@ -53,3 +63,9 @@ interface SExpressionWasmBuilder {
   void SExpressionWasmBuilder([Ref] AllocatingModule wasm, [Ref] Element input, boolean debug);
 };
 
+// Wasm printing
+
+interface WasmPrinter {
+  static void printModule(Module m);
+};
+
diff --git a/test/binaryen.js/test.js b/test/binaryen.js/test.js
index 9f59c4a86..858454d3d 100644
--- a/test/binaryen.js/test.js
+++ b/test/binaryen.js/test.js
@@ -12,9 +12,23 @@ var input =
   '  )\n' +
   ')\n';
 
+console.log('input:');
+console.log(input);
+console.log('================');
+
 var module = new Binaryen.AllocatingModule();
 var parser = new Binaryen.SExpressionParser(input);
-var builder = new Binaryen.SExpressionWasmBuilder(module, parser.get_root(), false);
+
+console.log('s-expr dump:');
+parser.get_root().dump();
+var s_module = parser.get_root().getChild(0);
+console.log('================');
+
+var builder = new Binaryen.SExpressionWasmBuilder(module, s_module, true);
+
+console.log('module:');
+WasmPrinter.prototype.printModule(module);
+console.log('================');
 
 var interface_ = new Binaryen.ShellExternalInterface();
 var instance = new Binaryen.ModuleInstance(module, interface_);