child_process.spawn does not work with npm run scripts on windows.

.travis.yml

@@ -8,4 +8,5 @@ node_js:
 - "iojs-3"
 - "4"
 - "5"
+before_script: "which npm"
 script: "npm test"

appveyor.yml

@@ -21,6 +21,7 @@ install:
 - node --version
 - npm --version
 - npm install
+- where npm
 
 # build
 build: off

package.json

@@ -1,9 +1,10 @@
 {
   "dependencies": {
+    "iswin": "0.0.2",
     "touch": "^1.0.0"
   },
   "scripts": {
-    "test": "npm run touch1",
+    "test": "npm run touch1 --verbose && node test.js",
     "touch1": "touch foo.txt"
   }
 }

test.js

@@ -1 +1,14 @@
-process.exit(1);
+var spawn = require('child_process').spawn;
+var iswin = require('iswin');
+console.log('process.cwd()');
+console.log(process.cwd());
+console.log('process.env.PATH');
+console.log(process.env.PATH);
+console.log('process.env.PATHEXT');
+console.log(process.env.PATHEXT);
+var cmd = (iswin()) ? 'npm.cmd' : 'npm';
+var touch1 = spawn(cmd, ['run', 'touch1', '--verbose'], { stdio: 'inherit' });
+touch1.on('error', function(err) {
+  console.error(err);
+  process.exit(1);
+});