From d88d1fb2ddea450ace82ca90aa9620c818d8dc61 Mon Sep 17 00:00:00 2001
From: Daniel Ehrenberg <littledan@chromium.org>
Date: Thu, 26 Oct 2017 15:06:46 +0200
Subject: [PATCH] BigInt: Add test for BigInt.prototype[Symbol.toStringTag]
Tests the fix for https://github.com/tc39/proposal-bigint/issues/92
---
.../BigInt/prototype/Symbol.toStringTag.js | 37 +++++++++++++++++++
1 file changed, 37 insertions(+)
create mode 100644 test/built-ins/BigInt/prototype/Symbol.toStringTag.js
diff --git a/test/built-ins/BigInt/prototype/Symbol.toStringTag.js b/test/built-ins/BigInt/prototype/Symbol.toStringTag.js
new file mode 100644
index 0000000000..7700bc4fd5
--- /dev/null
+++ b/test/built-ins/BigInt/prototype/Symbol.toStringTag.js
@@ -0,0 +1,37 @@
+// Copyright (C) 2017 Igalia, S. L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-bigint-@@tostringtag
+description: >
+ `Symbol.toStringTag` property descriptor
+info: >
+ The initial value of the @@toStringTag property is the String value
+ "BigInt".
+
+ This property has the attributes { [[Writable]]: false, [[Enumerable]]:
+ false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [Symbol.toStringTag, BigInt, Symbol]
+---*/
+
+verifyProperty(BigInt.prototype, Symbol.toStringTag, {
+ value: "BigInt",
+ writable: false,
+ enumerable: false,
+ configurable: true
+});
+
+assertEquals("[object BigInt]", Object.prototype.toString.call(3n));
+assertEquals("[object BigInt]", Object.prototype.toString.call(Object(3n)));
+
+// Verify that Object.prototype.toString does not have special casing for BigInt
+// as it does for most other primitive types
+Object.defineProperty(BigInt.prototype, {
+ value: "FooBar",
+ writable: false,
+ enumerable: false,
+ configurable: true
+});
+
+assertEquals("[object FooBar]", Object.prototype.toString.call(3n));
+assertEquals("[object FooBar]", Object.prototype.toString.call(Object(3n)));
--
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