fs: fix realpath{Sync} on resolving pipes/sockets

PR-URL: https://github.com/nodejs/node/pull/13028
Reviewed-By: Refael Ackermann <refack@gmail.com>

1 files changed, 34 insertions, 0 deletions

diff --git a/test/parallel/test-fs-realpath-pipe.js b/test/parallel/test-fs-realpath-pipe.js
new file mode 100644
index 0000000000..89bdc08229
--- /dev/null
+++ b/test/parallel/test-fs-realpath-pipe.js
@@ -0,0 +1,34 @@
+'use strict';
+
+const common = require('../common');
+
+if (common.isWindows || common.isAix) {
+  common.skip(`No /dev/stdin on ${process.platform}.`);
+  return;
+}
+
+const assert = require('assert');
+
+const { spawnSync } = require('child_process');
+
+for (const code of [
+  `require('fs').realpath('/dev/stdin', (err, resolvedPath) => {
+    if (err) {
+      process.exit(1);
+    }
+    if (resolvedPath) {
+      process.exit(2);
+    }
+  });`,
+  `try {
+    if (require('fs').realpathSync('/dev/stdin')) {
+      process.exit(2);
+    }
+  } catch (e) {
+    process.exit(1);
+  }`
+]) {
+  assert.strictEqual(spawnSync(process.execPath, ['-e', code], {
+    stdio: 'pipe'
+  }).status, 2);
+}