1 files changed, 59 insertions, 0 deletions
diff --git a/test/parallel/test-process-umask.js b/test/parallel/test-process-umask.js
new file mode 100644
index 0000000000..869619f191
--- /dev/null
+++ b/test/parallel/test-process-umask.js
@@ -0,0 +1,59 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+'use strict';
+const common = require('../common');
+const assert = require('assert');
+
+// Note in Windows one can only set the "user" bits.
+let mask;
+if (common.isWindows) {
+  mask = '0600';
+} else {
+  mask = '0664';
+}
+
+const old = process.umask(mask);
+
+assert.strictEqual(parseInt(mask, 8), process.umask(old));
+
+// confirm reading the umask does not modify it.
+// 1. If the test fails, this call will succeed, but the mask will be set to 0
+assert.strictEqual(old, process.umask());
+// 2. If the test fails, process.umask() will return 0
+assert.strictEqual(old, process.umask());
+
+assert.throws(() => {
+  process.umask({});
+}, {
+  code: 'ERR_INVALID_ARG_TYPE',
+  message: 'The "mask" argument must be one of type number, string, or ' +
+    'undefined. Received type object'
+});
+
+['123x', 'abc', '999'].forEach((value) => {
+  assert.throws(() => {
+    process.umask(value);
+  }, {
+    code: 'ERR_INVALID_ARG_VALUE',
+    message: `The argument 'mask' must be an octal string. Received '${value}'`
+  });
+});