1 files changed, 27 insertions, 0 deletions
diff --git a/js/src/tests/test262/intl402/NumberFormat/constructor-locales-string.js b/js/src/tests/test262/intl402/NumberFormat/constructor-locales-string.js
new file mode 100644
index 0000000000..b2703b1def
--- /dev/null
+++ b/js/src/tests/test262/intl402/NumberFormat/constructor-locales-string.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2018 Ujjwal Sharma. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-initializenumberformat
+description: >
+  Tests that passing a string value to the Intl.NumberFormat constructor is
+  equivalent to passing an Array containing the same string value.
+info: |
+  9.2.1 CanonicalizeLocaleList ( locales )
+
+  3 .If Type(locales) is String, then
+    a. Let O be CreateArrayFromList(« locales »).
+---*/
+
+const actual = Intl.NumberFormat('en-US').resolvedOptions();
+const expected = Intl.NumberFormat(['en-US']).resolvedOptions();
+
+assert.sameValue(actual.locale, expected.locale);
+assert.sameValue(actual.minimumIntegerDigits, expected.minimumIntegerDigits);
+assert.sameValue(actual.minimumFractionDigits, expected.minimumFractionDigits);
+assert.sameValue(actual.maximumFractionDigits, expected.maximumFractionDigits);
+assert.sameValue(actual.numberingSystem, expected.numberingSystem);
+assert.sameValue(actual.style, expected.style);
+assert.sameValue(actual.useGrouping, expected.useGrouping);
+
+reportCompare(0, 0);