1 files changed, 49 insertions, 0 deletions
diff --git a/js/src/tests/test262/intl402/DisplayNames/options-languagedisplay-valid.js b/js/src/tests/test262/intl402/DisplayNames/options-languagedisplay-valid.js
new file mode 100644
index 0000000000..3b6ce728d4
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+++ b/js/src/tests/test262/intl402/DisplayNames/options-languagedisplay-valid.js
@@ -0,0 +1,49 @@
+// Copyright (C) 2021 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-Intl.DisplayNames
+description: Valid options for languageDisplay
+info: |
+  Intl.DisplayNames ( locales , options )
+
+  1. If NewTarget is undefined, throw a TypeError exception.
+  2. Let displayNames be ? OrdinaryCreateFromConstructor(NewTarget, "%DisplayNamesPrototype%",
+    « [[InitializedDisplayNames]], [[Locale]], [[Style]], [[Type]], [[Fallback]], [[Fields]] »).
+  ...
+  4. Let options be ? ToObject(options).
+  ...
+  8. Let matcher be ? GetOption(options, "localeMatcher", "string", « "lookup", "best fit" », "best fit").
+  ...
+  10. Let style be ? GetOption(options, "style", "string", « "narrow", "short", "long" », "long").
+  ...
+  12. Let type be ? GetOption(options, "type", "string", « "language", "region", "script", "currency" », undefined).
+  13. If type is undefined, throw a TypeError exception.
+  ...
+  24. Let languageDisplay be ? GetOption(options, "languageDisplay", "string", « "dialect", "standard" », "dialect").
+  ...
+
+  GetOption ( options, property, type, values, fallback )
+
+  1. Let value be ? Get(options, property).
+  ...
+features: [Intl.DisplayNames-v2]
+locale: [en]
+---*/
+
+// results for option values verified in the tests for resolvedOptions
+
+const languageDisplays = [
+  undefined,
+  'dialect',
+  'standard'
+];
+
+languageDisplays.forEach(languageDisplay => {
+  const obj = new Intl.DisplayNames('en', { languageDisplay, type: 'language'});
+
+  assert(obj instanceof Intl.DisplayNames, `instanceof check - ${languageDisplay}`);
+  assert.sameValue(Object.getPrototypeOf(obj), Intl.DisplayNames.prototype, `proto check - ${languageDisplay}`);
+});
+
+reportCompare(0, 0);