Adjust Intl.NumberFormat tests

Author: shvaikalesh

test/intl402/NumberFormat/prototype/toStringTag/configurable.js

@@ -4,14 +4,14 @@
 /*---
 esid: sec-intl.numberformat.prototype-@@tostringtag
 description: >
-  Check that the initial value of the property is "Object" and that any changes
+  Check that the initial value of the property is "Intl.NumberFormat" and that any changes
   made by reconfiguring are reflected.
 ---*/
 
-assert.sameValue(Intl.NumberFormat.prototype[Symbol.toStringTag], 'Object');
+assert.sameValue(Intl.NumberFormat.prototype[Symbol.toStringTag], 'Intl.NumberFormat');
 assert.sameValue(
   Object.prototype.toString.call(new Intl.NumberFormat()),
-  '[object Object]'
+  '[object Intl.NumberFormat]'
 );
 
 Object.defineProperty(Intl.NumberFormat.prototype, Symbol.toStringTag, {
@@ -23,3 +23,11 @@ assert.sameValue(
   Object.prototype.toString.call(new Intl.NumberFormat()),
   '[object Alpha]'
 );
+
+delete Intl.NumberFormat.prototype[Symbol.toStringTag];
+
+assert.sameValue(Intl.NumberFormat.prototype[Symbol.toStringTag], undefined);
+assert.sameValue(
+  Object.prototype.toString.call(new Intl.NumberFormat()),
+  '[object Object]'
+);

test/intl402/NumberFormat/prototype/toStringTag/prop-desc.js

@@ -9,7 +9,7 @@ includes: [propertyHelper.js]
 ---*/
 
 verifyProperty(Intl.NumberFormat.prototype, Symbol.toStringTag, {
-  value: 'Object',
+  value: 'Intl.NumberFormat',
   writable: false,
   enumerable: false,
   configurable: true