[javascriptcore-test262-automation] Changes from...

[javascriptcore-test262-automation] Changes from https://github.com/webkit/webkit.git at sha 3ced8564a6 on Thu Sep 06 2018 18:18:56 GMT+0000 (Coordinated Universal Time)

implementation-contributed/javascriptcore/stress/regress-189185.js

-//@ runDefault
 //@ skip if $architecture == "x86"
+//@ runDefault
 // This passes if it does not crash.
 new WebAssembly.CompileError({
     valueOf() {

implementation-contributed/javascriptcore/stress/symbol-description.js

+function shouldBe(actual, expected) {
+    if (actual !== expected)
+        throw new Error(`bad value: ${String(actual)}`);
+}
+
+function shouldThrow(func, errorMessage) {
+    var errorThrown = false;
+    var error = null;
+    try {
+        func();
+    } catch (e) {
+        errorThrown = true;
+        error = e;
+    }
+    if (!errorThrown)
+        throw new Error('not thrown');
+    if (String(error) !== errorMessage)
+        throw new Error(`bad error: ${String(error)}`);
+}
+
+var s0 = Symbol("Cocoa");
+var s1 = Symbol("Cappuccino");
+var s2 = Symbol("");
+var s3 = Symbol();
+
+shouldBe(s0.description, "Cocoa");
+shouldBe(s0.toString(), "Symbol(Cocoa)");
+shouldBe(s1.description, "Cappuccino");
+shouldBe(s1.toString(), "Symbol(Cappuccino)");
+shouldBe(s2.description, "");
+shouldBe(s2.toString(), "Symbol()");
+shouldBe(s3.description, undefined);
+shouldBe(s3.toString(), "Symbol()");
+
+var o0 = Object(s0);
+var o1 = Object(s1);
+var o2 = Object(s2);
+var o3 = Object(s3);
+
+shouldBe(o0.description, "Cocoa");
+shouldBe(o0.toString(), "Symbol(Cocoa)");
+shouldBe(o1.description, "Cappuccino");
+shouldBe(o1.toString(), "Symbol(Cappuccino)");
+shouldBe(o2.description, "");
+shouldBe(o2.toString(), "Symbol()");
+shouldBe(o3.description, undefined);
+shouldBe(o3.toString(), "Symbol()");
+
+var descriptor = Object.getOwnPropertyDescriptor(Symbol.prototype, "description");
+shouldBe(descriptor.enumerable, false);
+shouldBe(descriptor.configurable, true);
+shouldBe(descriptor.set, undefined);
+shouldBe(typeof descriptor.get, "function");
+
+shouldThrow(() => {
+    "use strict";
+    s0.description = "Matcha";
+}, `TypeError: Attempted to assign to readonly property.`);
+shouldThrow(() => {
+    "use strict";
+    o0.description = "Matcha";
+}, `TypeError: Attempted to assign to readonly property.`);
+
+shouldThrow(() => {
+    descriptor.get.call({});
+}, `TypeError: Symbol.prototype.description requires that |this| be a symbol or a symbol object`);
+
+shouldThrow(() => {
+    descriptor.get.call(null);
+}, `TypeError: Symbol.prototype.description requires that |this| be a symbol or a symbol object`);
+
+shouldThrow(() => {
+    descriptor.get.call(undefined);
+}, `TypeError: Symbol.prototype.description requires that |this| be a symbol or a symbol object`);
+
+shouldThrow(() => {
+    descriptor.get.call(42);
+}, `TypeError: Symbol.prototype.description requires that |this| be a symbol or a symbol object`);
+
+shouldThrow(() => {
+    descriptor.get.call("Hello");
+}, `TypeError: Symbol.prototype.description requires that |this| be a symbol or a symbol object`);
+
+shouldThrow(() => {
+    descriptor.get.call(42.195);
+}, `TypeError: Symbol.prototype.description requires that |this| be a symbol or a symbol object`);
+
+shouldThrow(() => {
+    descriptor.get.call(false);
+}, `TypeError: Symbol.prototype.description requires that |this| be a symbol or a symbol object`);
+
+shouldBe(descriptor.get.call(s0), "Cocoa");
+shouldBe(descriptor.get.call(o0), "Cocoa");
+o0.__proto__ = {};
+shouldBe(descriptor.get.call(o0), "Cocoa");