fix windows stat dir symlink

Author: everett1992

test/lib/commands/copy.js

@@ -172,9 +172,16 @@ t.test('workspaces', async t => {
     await npm.exec('copy', ['build'])
     const canonPath = path.join('build', 'node_modules', 'a')
     const linkPath = path.join('build', 'node_modules', 'c')
+
+    // if we stat the linkPath windows errors with EPERM, so I want to stat the
+    // link target, which means resolving relative links.
+    const linkDest = path.resolve(
+      path.dirname(linkPath),
+      fs.readlinkSync(linkPath))
+
     t.strictSame(
       fs.statSync(canonPath),
-      fs.statSync(linkPath),
+      fs.statSync(linkDest),
       `${linkPath} should be a link to ${canonPath}`)
   })
 })