1 files changed, 39 insertions, 0 deletions
diff --git a/js/src/tests/test262/intl402/Locale/constructor-options-casefirst-invalid.js b/js/src/tests/test262/intl402/Locale/constructor-options-casefirst-invalid.js
new file mode 100644
index 0000000000..e15c14c45c
--- /dev/null
+++ b/js/src/tests/test262/intl402/Locale/constructor-options-casefirst-invalid.js
@@ -0,0 +1,39 @@
+// Copyright 2018 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-intl.locale
+description: >
+    Checks error cases for the options argument to the Locale constructor.
+info: |
+    Intl.Locale( tag [, options] )
+
+    ...
+    22. Let kf be ? GetOption(options, "caseFirst", "string", « "upper", "lower", "false" », undefined).
+    ...
+
+    GetOption ( options, property, type, values, fallback )
+    ...
+    2.  d. If values is not undefined, then
+            i. If values does not contain an element equal to value, throw a RangeError exception.
+    ...
+features: [Intl.Locale]
+---*/
+
+
+const invalidCaseFirstOptions = [
+  "",
+  "u",
+  "Upper",
+  "upper\0",
+  "uppercase",
+  "true",
+  { valueOf() { return false; } },
+];
+for (const caseFirst of invalidCaseFirstOptions) {
+  assert.throws(RangeError, function() {
+    new Intl.Locale("en", {caseFirst});
+  }, `new Intl.Locale("en", {caseFirst: "${caseFirst}"}) throws RangeError`);
+}
+
+reportCompare(0, 0);