fix: arrayBuffer() stub should return a promise

Author: 3cp

spec/trace.spec.js

@@ -198,7 +198,7 @@ test('trace transforms wasm file', t => {
   trace(unit).then(traced => {
     t.deepEqual(traced, {
       path: 'src/foo/bar.wasm',
-      contents: "define('raw!foo/bar.wasm',['base64-arraybuffer'],function(a){return {arrayBuffer: function() {return a.decode(\"abc\");}}});\n",
+      contents: "define('raw!foo/bar.wasm',['base64-arraybuffer'],function(a){return {arrayBuffer: function() {return Promise.resolve(a.decode(\"abc\"));}}});\n",
       sourceMap: undefined,
       moduleId: 'foo/bar.wasm',
       defined: 'raw!foo/bar.wasm',

spec/transformers/wasm.spec.js

@@ -3,7 +3,7 @@ import wasm from '../../src/transformers/wasm';
 
 test('wasm wraps wasm into amd module', t => {
   const source = 'abc';
-  const target = "define('raw!a.wasm',['base64-arraybuffer'],function(a){return {arrayBuffer: function() {return a.decode(\"abc\");}}});\n";
+  const target = "define('raw!a.wasm',['base64-arraybuffer'],function(a){return {arrayBuffer: function() {return Promise.resolve(a.decode(\"abc\"));}}});\n";
 
   t.deepEqual(wasm('a.wasm', source), {
     defined: 'raw!a.wasm',

src/transformers/wasm.js

@@ -2,7 +2,7 @@
 export default function (moduleId, base64) {
   return {
     defined: `raw!${moduleId}`,
-    contents:`define('raw!${moduleId}',['base64-arraybuffer'],function(a){return {arrayBuffer: function() {return a.decode(${JSON.stringify(base64)});}}});\n`,
+    contents:`define('raw!${moduleId}',['base64-arraybuffer'],function(a){return {arrayBuffer: function() {return Promise.resolve(a.decode(${JSON.stringify(base64)}));}}});\n`,
     deps: ['base64-arraybuffer']
   };
 }