test: port domains regression test from v0.10

test/parallel/test-domain-top-level-error-handler-clears-stack.js

@@ -0,0 +1,34 @@
+'use strict';
+
+const common = require('../common');
+const domain = require('domain');
+
+/*
+ * Make sure that the domains stack is cleared after a top-level domain
+ * error handler exited gracefully.
+ */
+const d = domain.create();
+
+d.on('error', common.mustCall(function() {
+  process.nextTick(function() {
+    // Scheduling a callback with process.nextTick will enter a _new_ domain,
+    // and the callback will be called after the domain that handled the error
+    // was exited. So there should be only one domain on the domains stack if
+    // the domains stack was cleared properly when the domain error handler
+    // returned.
+    if (domain._stack.length !== 1) {
+      // Do not use assert to perform this test: this callback runs in a
+      // different callstack as the original process._fatalException that
+      // handled the original error, thus throwing here would trigger another
+      // call to process._fatalException, and so on recursively and
+      // indefinitely.
+      console.error('domains stack length should be 1, but instead is:',
+        domain._stack.length);
+      process.exit(1);
+    }
+  });
+}));
+
+d.run(function() {
+  throw new Error('Error from domain');
+});