Use propertyHelper, add more tests, fix getter calls

test/built-ins/Symbol/prototype/description/descriptor.js

@@ -8,12 +8,18 @@ description: >
 info: |
     `Symbol.prototype.description` is an accessor property whose
     set accessor function is undefined.
+includes: [propertyHelper.js]
 features: [Symbol.prototype.description]
 ---*/
 
-const desc = Object.getOwnPropertyDescriptor(Symbol.prototype, 'description');
+
-assert.sameValue(typeof desc.get, 'function');
+var desc = Object.getOwnPropertyDescriptor(Symbol.prototype, 'description');
+
 assert.sameValue(desc.set, undefined);
 assert.sameValue(desc.writable, undefined);
-assert.sameValue(desc.enumerable, false);
+assert.sameValue(typeof desc.get, 'function');
-assert.sameValue(desc.configurable, true);
+
+verifyProperty(Symbol.prototype, 'description', {
+  enumerable: false,
+  configurable: true,
+});

test/built-ins/Symbol/prototype/description/get.js

@@ -19,3 +19,11 @@ assert.sameValue(symbol.hasOwnProperty('description'), false);
 const empty = Symbol();
 assert.sameValue(empty.description, undefined);
 assert.sameValue(empty.hasOwnProperty('description'), false);
+
+const undef = Symbol(undefined);
+assert.sameValue(undef.description, undefined);
+assert.sameValue(undef.hasOwnProperty('description'), false);
+
+const emptyStr = Symbol('');
+assert.sameValue(emptyStr.description, '');
+assert.sameValue(emptyStr.hasOwnProperty('description'), false);

test/built-ins/Symbol/prototype/description/this-val-non-symbol.js

@@ -13,30 +13,34 @@ info: |
 features: [Symbol.prototype.description]
 ---*/
 
+const getter = Object.getOwnPropertyDescriptor(
+  Symbol.prototype, 'description'
+).get;
+
 assert.throws(TypeError, function() {
-  Symbol.prototype.description.call(null);
+  getter.call(null);
 });
 
 assert.throws(TypeError, function() {
-  Symbol.prototype.description.call(123);
+  getter.call(123);
 });
 
 assert.throws(TypeError, function() {
-  Symbol.prototype.description.call('test');
+  getter.call('test');
 });
 
 assert.throws(TypeError, function() {
-  Symbol.prototype.description.call(true);
+  getter.call(true);
 });
 
 assert.throws(TypeError, function() {
-  Symbol.prototype.description.call(undefined);
+  getter.call(undefined);
 });
 
 assert.throws(TypeError, function() {
-  Symbol.prototype.description.call(new Proxy({}, {}));
+  getter.call(new Proxy({}, {}));
 });
 
 assert.throws(TypeError, function() {
-  Symbol.prototype.description.call({});
+  getter.call({});
 });

test/built-ins/Symbol/prototype/description/wrapper.js

@@ -19,3 +19,11 @@ assert.sameValue(symbol.hasOwnProperty('description'), false);
 const empty = Object(Symbol());
 assert.sameValue(empty.description, undefined);
 assert.sameValue(empty.hasOwnProperty('description'), false);
+
+const undef = Object(Symbol(undefined));
+assert.sameValue(undef.description, undefined);
+assert.sameValue(undef.hasOwnProperty('description'), false);
+
+const emptyStr = Object(Symbol(''));
+assert.sameValue(emptyStr.description, '');
+assert.sameValue(emptyStr.hasOwnProperty('description'), false);