1 files changed, 61 insertions, 0 deletions
diff --git a/deps/v8/test/intl/bigint/tolocalestring.js b/deps/v8/test/intl/bigint/tolocalestring.js
new file mode 100644
index 0000000000..d0b6792ea8
--- /dev/null
+++ b/deps/v8/test/intl/bigint/tolocalestring.js
@@ -0,0 +1,61 @@
+// Copyright 2019 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --harmony-intl-bigint
+
+var locales = [
+    "en",  // "1,234,567,890,123,456"
+    "de",  // "1.234.567.890.123.456"
+    "fr",  // "1 234 567 890 123 456"
+    "hi",  // "1,23,45,67,89,01,23,456"
+    "fa",  // "۱٬۲۳۴٬۵۶۷٬۸۹۰٬۱۲۳٬۴۵۶"
+    "th-u-nu-thai",  // "๑,๒๓๔,๕๖๗,๘๙๐,๑๒๓,๔๕๖"
+];
+
+var data = [
+    Number.MAX_SAFE_INTEGER,
+    -Number.MAX_SAFE_INTEGER,
+    Math.floor(Number.MAX_SAFE_INTEGER / 2),
+    0,
+    /// -0, // this case is broken now.
+];
+
+for (var locale of locales) {
+  let nf = new Intl.NumberFormat(locale);
+
+  let percentOption = {style: "percent"};
+  let nfPercent = new Intl.NumberFormat(locale, percentOption);
+  for (var n of data) {
+    let bigint = BigInt(n);
+    // Test NumberFormat w/ number output the same as
+    // BigInt.prototype.toLocaleString()
+    assertEquals(nf.format(n), bigint.toLocaleString(locale));
+
+    // Test NumberFormat output the same regardless pass in as number or BigInt
+    assertEquals(nf.format(n), nf.format(bigint));
+
+    // Test formatToParts
+    assertEquals(nf.formatToParts(n), nf.formatToParts(bigint));
+
+    // Test output with option
+    // Test NumberFormat w/ number output the same as
+    // BigInt.prototype.toLocaleString()
+    assertEquals(nfPercent.format(n),
+        bigint.toLocaleString(locale, percentOption));
+
+    // Test NumberFormat output the same regardless pass in as number or BigInt
+    assertEquals(nfPercent.format(n), nfPercent.format(bigint));
+    assertEquals(nfPercent.formatToParts(n), nfPercent.formatToParts(bigint));
+  }
+
+  // Test very big BigInt
+  let veryBigInt = BigInt(Number.MAX_SAFE_INTEGER) *
+      BigInt(Number.MAX_SAFE_INTEGER) *
+      BigInt(Number.MAX_SAFE_INTEGER);
+  assertEquals(nf.format(veryBigInt), veryBigInt.toLocaleString(locale));
+  // It should output different than toString
+  assertFalse(veryBigInt.toLocaleString(locale) == veryBigInt.toString());
+  assertTrue(veryBigInt.toLocaleString(locale).length >
+      veryBigInt.toString().length);
+}