Fix Windows build?

Author: dfreeman

node-tests/helpers/skeleton-app.js

@@ -13,16 +13,15 @@ module.exports = class SkeletonApp {
   }
 
   build() {
-    return execa('ember', ['build'], { cwd: this.appDir });
+    return this._ember(['build']);
   }
 
   serve() {
     if (this._watched) {
       throw new Error('Already serving');
     }
 
-    let ember = execa('ember', ['serve'], { cwd: this.appDir });
-    return this._watched = new WatchedBuild(ember);
+    return this._watched = new WatchedBuild(this._ember(['serve']));
   }
 
   writeFile(path, contents) {
@@ -42,9 +41,14 @@ module.exports = class SkeletonApp {
       fs.removeSync(this.appDir);
     } catch (error) {
       // eslint-disable-next-line no-console
-      console.warn(`Error removing skeleton-app tmpdir ${this.appDir}`, error);
+      console.warn(`Warning: unable to remove skeleton-app tmpdir ${this.appDir} (${error.code})`);
     }
   }
+
+  _ember(args) {
+    let ember = require.resolve('ember-cli/bin/ember');
+    return execa('node', [ember].concat(args), { cwd: this.appDir });
+  }
 }
 
 class WatchedBuild extends EventEmitter {