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

[javascriptcore-test262-automation] Changes from https://github.com/webkit/webkit.git at sha 12df785646 on Mon Aug 27 2018 18:14:52 GMT+0000 (Coordinated Universal Time)

implementation-contributed/javascriptcore/stress/reverse-with-immutable-butterfly.js

+function shouldBe(actual, expected) {
+    if (actual !== expected)
+        throw new Error('bad value: ' + actual);
+}
+
+function reverseInt()
+{
+    var array = [0, 1, 2, 3];
+    return array.reverse();
+}
+
+function reverseDouble()
+{
+    var array = [0.0, 1.1, 2.2, 3.3];
+    return array.reverse();
+}
+
+function reverseContiguous()
+{
+    var array = [0.0, 1.1, 2.2, 'hello'];
+    return array.reverse();
+}
+
+for (var i = 0; i < 1e4; ++i) {
+    shouldBe(JSON.stringify(reverseInt()), `[3,2,1,0]`);
+    shouldBe(JSON.stringify(reverseDouble()), `[3.3,2.2,1.1,0]`);
+    shouldBe(JSON.stringify(reverseContiguous()), `["hello",2.2,1.1,0]`);
+}