1 files changed, 28 insertions, 0 deletions
diff --git a/js/src/tests/test262/intl402/RelativeTimeFormat/prototype/format/branding.js b/js/src/tests/test262/intl402/RelativeTimeFormat/prototype/format/branding.js
new file mode 100644
index 0000000000..fa7f890ad7
--- /dev/null
+++ b/js/src/tests/test262/intl402/RelativeTimeFormat/prototype/format/branding.js
@@ -0,0 +1,28 @@
+// Copyright 2018 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-Intl.RelativeTimeFormat.prototype.format
+description: Verifies the branding check for the "format" function of the RelativeTimeFormat prototype object.
+info: |
+    Intl.RelativeTimeFormat.prototype.format( value, unit )
+
+    2. If Type(relativeTimeFormat) is not Object or relativeTimeFormat does not have an [[InitializedRelativeTimeFormat]] internal slot whose value is true, throw a TypeError exception.
+features: [Intl.RelativeTimeFormat]
+---*/
+
+const format = Intl.RelativeTimeFormat.prototype.format;
+
+assert.sameValue(typeof format, "function");
+
+assert.throws(TypeError, () => format.call(undefined), "undefined");
+assert.throws(TypeError, () => format.call(null), "null");
+assert.throws(TypeError, () => format.call(true), "true");
+assert.throws(TypeError, () => format.call(""), "empty string");
+assert.throws(TypeError, () => format.call(Symbol()), "symbol");
+assert.throws(TypeError, () => format.call(1), "1");
+assert.throws(TypeError, () => format.call({}), "plain object");
+assert.throws(TypeError, () => format.call(Intl.RelativeTimeFormat), "Intl.RelativeTimeFormat");
+assert.throws(TypeError, () => format.call(Intl.RelativeTimeFormat.prototype), "Intl.RelativeTimeFormat.prototype");
+
+reportCompare(0, 0);