1 files changed, 70 insertions, 0 deletions
diff --git a/js/src/tests/non262/Intl/DateTimeFormat/cross-compartment.js b/js/src/tests/non262/Intl/DateTimeFormat/cross-compartment.js
new file mode 100644
index 0000000000..dac99bdc19
--- /dev/null
+++ b/js/src/tests/non262/Intl/DateTimeFormat/cross-compartment.js
@@ -0,0 +1,70 @@
+// |reftest| skip-if(!this.hasOwnProperty("Intl"))
+
+var otherGlobal = newGlobal();
+
+var dateTimeFormat = new Intl.DateTimeFormat();
+var ccwDateTimeFormat = new otherGlobal.Intl.DateTimeFormat();
+
+// Test Intl.DateTimeFormat.prototype.format with a CCW object.
+var Intl_DateTimeFormat_format_get = Object.getOwnPropertyDescriptor(Intl.DateTimeFormat.prototype, "format").get;
+
+assertEq(Intl_DateTimeFormat_format_get.call(ccwDateTimeFormat)(0),
+         Intl_DateTimeFormat_format_get.call(dateTimeFormat)(0));
+
+// Test Intl.DateTimeFormat.prototype.formatToParts with a CCW object.
+var Intl_DateTimeFormat_formatToParts = Intl.DateTimeFormat.prototype.formatToParts;
+
+assertEq(deepEqual(Intl_DateTimeFormat_formatToParts.call(ccwDateTimeFormat, 0),
+                   Intl_DateTimeFormat_formatToParts.call(dateTimeFormat, 0)),
+         true);
+
+// Test Intl.DateTimeFormat.prototype.resolvedOptions with a CCW object.
+var Intl_DateTimeFormat_resolvedOptions = Intl.DateTimeFormat.prototype.resolvedOptions;
+
+assertEq(deepEqual(Intl_DateTimeFormat_resolvedOptions.call(ccwDateTimeFormat),
+                   Intl_DateTimeFormat_resolvedOptions.call(dateTimeFormat)),
+         true);
+
+// Special case for Intl.DateTimeFormat: The Intl fallback symbol.
+
+function fallbackSymbol(global) {
+    var DTF = global.Intl.DateTimeFormat;
+    return Object.getOwnPropertySymbols(DTF.call(Object.create(DTF.prototype)))[0];
+}
+
+const intlFallbackSymbol = fallbackSymbol(this);
+const otherIntlFallbackSymbol = fallbackSymbol(otherGlobal);
+assertEq(intlFallbackSymbol === otherIntlFallbackSymbol, false);
+
+// Test when the fallback symbol points to a CCW DateTimeFormat object.
+var objWithFallbackCCWDateTimeFormat = {
+    __proto__: Intl.DateTimeFormat.prototype,
+    [intlFallbackSymbol]: ccwDateTimeFormat,
+};
+
+assertEq(Intl_DateTimeFormat_format_get.call(objWithFallbackCCWDateTimeFormat)(0),
+         Intl_DateTimeFormat_format_get.call(dateTimeFormat)(0));
+
+assertEq(deepEqual(Intl_DateTimeFormat_resolvedOptions.call(objWithFallbackCCWDateTimeFormat),
+                   Intl_DateTimeFormat_resolvedOptions.call(dateTimeFormat)),
+         true);
+
+// Ensure the fallback symbol(s) are not accessed for CCW DateTimeFormat objects.
+var ccwDateTimeFormatWithPoisonedFallback = new otherGlobal.Intl.DateTimeFormat();
+Object.setPrototypeOf(ccwDateTimeFormatWithPoisonedFallback, Intl.DateTimeFormat.prototype);
+Object.defineProperty(ccwDateTimeFormatWithPoisonedFallback, intlFallbackSymbol, {
+    get() { throw new Error(); }
+});
+Object.defineProperty(ccwDateTimeFormatWithPoisonedFallback, otherIntlFallbackSymbol, {
+    get() { throw new Error(); }
+});
+
+assertEq(Intl_DateTimeFormat_format_get.call(ccwDateTimeFormatWithPoisonedFallback)(0),
+         Intl_DateTimeFormat_format_get.call(dateTimeFormat)(0));
+
+assertEq(deepEqual(Intl_DateTimeFormat_resolvedOptions.call(ccwDateTimeFormatWithPoisonedFallback),
+                   Intl_DateTimeFormat_resolvedOptions.call(dateTimeFormat)),
+         true);
+
+if (typeof reportCompare === "function")
+    reportCompare(true, true);