child_process: add string shortcut for fork stdio

Add string shortcut option for stdio parameter.

Fixes: https://github.com/nodejs/node/issues/10793
PR-URL: https://github.com/nodejs/node/pull/10866
Reviewed-By: Sam Roberts <vieuxtech@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Brian White <mscdex@mscdex.net>

1 files changed, 27 insertions, 0 deletions

diff --git a/test/parallel/test-child-process-fork-stdio-string-variant.js b/test/parallel/test-child-process-fork-stdio-string-variant.js
new file mode 100644
index 0000000000..93676892b6
--- /dev/null
+++ b/test/parallel/test-child-process-fork-stdio-string-variant.js
@@ -0,0 +1,27 @@
+'use strict';
+const common = require('../common');
+
+// Ensures that child_process.fork can accept string
+// variant of stdio parameter in options object and
+// throws a TypeError when given an unexpected string
+
+const assert = require('assert');
+const fork = require('child_process').fork;
+
+const childScript = `${common.fixturesDir}/child-process-spawn-node`;
+const errorRegexp = /^TypeError: Unknown stdio option$/;
+const malFormedOpts = {stdio: '33'};
+const payload = {hello: 'world'};
+const stringOpts = {stdio: 'pipe'};
+
+assert.throws(() => fork(childScript, malFormedOpts), errorRegexp);
+
+const child = fork(childScript, stringOpts);
+
+child.on('message', (message) => {
+  assert.deepStrictEqual(message, {foo: 'bar'});
+});
+
+child.send(payload);
+
+child.on('exit', common.mustCall((code) => assert.strictEqual(code, 0)));