fs: include filename in watch errors

This commit adds the relevant filename to fs.watch() errors.

Refs: https://github.com/nodejs/node-v0.x-archive/pull/25542
PR-URL: https://github.com/nodejs/node/pull/2748
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/test/sequential/test-fs-watch.js b/test/sequential/test-fs-watch.js
index 10f4baf591..385cf47686 100644
--- a/test/sequential/test-fs-watch.js
+++ b/test/sequential/test-fs-watch.js
@@ -126,3 +126,20 @@ assert.throws(function() {
   w.stop();
 }, TypeError);
 oldhandle.stop(); // clean up
+
+assert.throws(function() {
+  fs.watch('non-existent-file');
+}, function(err) {
+  assert(err);
+  assert(/non-existent-file/.test(err));
+  assert.equal(err.filename, 'non-existent-file');
+  return true;
+});
+
+var watcher = fs.watch(__filename);
+watcher.on('error', common.mustCall(function(err) {
+  assert(err);
+  assert(/non-existent-file/.test(err));
+  assert.equal(err.filename, 'non-existent-file');
+}));
+watcher._handle.onchange(-1, 'ENOENT', 'non-existent-file');