[wasm] Compile and Instantiation

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

 // Copyright 2015 the V8 project authors. All rights reserved.
 // 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");
 
 let kReturnValue = 117;
@@ skipping 40 matching lines @@
 
 // Deprecated experimental API.
 CheckInstance(Wasm.instantiateModule(buffer));
 
 // Official API
 let module = new WebAssembly.Module(buffer);
 CheckInstance(new WebAssembly.Instance(module));
 
 let promise = WebAssembly.compile(buffer);
 promise.then(module => CheckInstance(new WebAssembly.Instance(module)));
+
+// Negative tests.

[rossberg, 2016/07/04 10:04:00]

We should probably have a few new positive tests, too. For example, testing that
instantiating the same module several times works correctly.

[Mircea Trofin, 2016/07/05 06:02:43]

True - actually, for that to work, we'll have to clone the compiled code.

+(function InvalidModules() {
+  let invalid_cases = [undefined, 1, "", "a", {some:1, obj: "b"}];
+  let len = invalid_cases.length;
+  for (var i = 0; i < len; ++i) {
+    try {
+      let instance = new WebAssembly.Instance(1);
+      assertUnreachable("should not be able to instantiate invalid modules.");
+    } catch (e) {
+      assertContains("Argument 0", e.toString());
+    }
+  }
+})();