1 files changed, 187 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/array-copyWithin.js b/js/src/jit-test/tests/basic/array-copyWithin.js
new file mode 100644
index 0000000000..113613b38b
--- /dev/null
+++ b/js/src/jit-test/tests/basic/array-copyWithin.js
@@ -0,0 +1,187 @@
+// Tests for Array#copyWithin
+
+load(libdir + "asserts.js");
+
+assertEq(Array.prototype.copyWithin.length, 2);
+
+// works with two arguments
+assertDeepEq([1, 2, 3, 4, 5].copyWithin(0, 3), [4, 5, 3, 4, 5]);
+assertDeepEq([1, 2, 3, 4, 5].copyWithin(1, 3), [1, 4, 5, 4, 5]);
+assertDeepEq([1, 2, 3, 4, 5].copyWithin(1, 2), [1, 3, 4, 5, 5]);
+assertDeepEq([1, 2, 3, 4, 5].copyWithin(2, 2), [1, 2, 3, 4, 5]);
+
+// works with three arguments
+assertDeepEq([1, 2, 3, 4, 5].copyWithin(0, 3, 4), [4, 2, 3, 4, 5]);
+assertDeepEq([1, 2, 3, 4, 5].copyWithin(1, 3, 4), [1, 4, 3, 4, 5]);
+assertDeepEq([1, 2, 3, 4, 5].copyWithin(1, 2, 4), [1, 3, 4, 4, 5]);
+
+// works with negative arguments
+assertDeepEq([1, 2, 3, 4, 5].copyWithin(0, -2), [4, 5, 3, 4, 5]);
+assertDeepEq([1, 2, 3, 4, 5].copyWithin(0, -2, -1), [4, 2, 3, 4, 5]);
+assertDeepEq([1, 2, 3, 4, 5].copyWithin(-4, -3, -2), [1, 3, 3, 4, 5]);
+assertDeepEq([1, 2, 3, 4, 5].copyWithin(-4, -3, -1), [1, 3, 4, 4, 5]);
+assertDeepEq([1, 2, 3, 4, 5].copyWithin(-4, -3), [1, 3, 4, 5, 5]);
+
+// works with array-like objects
+var args = (function () { return Array.prototype.slice.call(arguments); }(1, 2, 3));
+var argsClass = Object.prototype.toString.call(args);
+assertDeepEq(args, [1, 2, 3]);
+Array.prototype.copyWithin.call(args, -2, 0);
+assertDeepEq(args, [1, 1, 2]);
+assertDeepEq(Object.prototype.toString.call(args), argsClass);
+
+// throws on null/undefined values
+assertThrowsInstanceOf(function() {
+  Array.prototype.copyWithin.call(null, 0, 3);
+}, TypeError, "Assert that copyWithin fails if this value is null");
+
+assertThrowsInstanceOf(function() {
+  Array.prototype.copyWithin.call(undefined, 0, 3);
+}, TypeError, "Assert that copyWithin fails if this value is undefined");
+
+// test with this value as string
+assertThrowsInstanceOf(function() {
+  Array.prototype.copyWithin.call("hello world", 0, 3);
+}, TypeError, "Assert that copyWithin fails if this value is string");
+
+// test with this value as number
+assertDeepEq(Array.prototype.copyWithin.call(34, 0, 3), new Number(34));
+
+// test with this value as TypedArray
+var buffer = new ArrayBuffer(16);
+var int32View = new Int32Array(buffer);
+for (var i=0; i<int32View.length; i++) {
+  int32View[i] = i*2;
+}
+assertDeepEq(Array.prototype.copyWithin.call(int32View, 0, 1), new Int32Array([2, 4, 6, 6]));
+
+// if arguments object is sloppy, copyWithin must move the arguments around
+function f(a, b, c, d, e) {
+  [].copyWithin.call(arguments, 1, 3);
+  return [a, b, c, d, e];
+}
+assertDeepEq(f(1, 2, 3, 4, 5), [1, 4, 5, 4, 5]);
+
+// test with target > start on 2 arguments
+assertDeepEq([1, 2, 3, 4, 5].copyWithin(3, 0), [1, 2, 3, 1, 2]);
+
+// test with target > start on 3 arguments
+assertDeepEq([1, 2, 3, 4, 5].copyWithin(3, 0, 4), [1, 2, 3, 1, 2]);
+
+// test on array with holes
+var arr = new Array(6);
+for (var i = 0; i < arr.length; i += 2) {
+  arr[i] = i;
+}
+assertDeepEq(arr.copyWithin(0, 3), [, 4, , , 4, , ]);
+
+// test on fractional arguments
+assertDeepEq([1, 2, 3, 4, 5].copyWithin(0.2, 3.9), [4, 5, 3, 4, 5]);
+
+// test with -0
+assertDeepEq([1, 2, 3, 4, 5].copyWithin(-0, 3), [4, 5, 3, 4, 5]);
+
+// test with arguments more than this.length
+assertDeepEq([1, 2, 3, 4, 5].copyWithin(0, 7), [1, 2, 3, 4, 5]);
+
+// test with arguments less than -this.length
+assertDeepEq([1, 2, 3, 4, 5].copyWithin(-7, 0), [1, 2, 3, 4, 5]);
+
+// test with arguments equal to -this.length
+assertDeepEq([1, 2, 3, 4, 5].copyWithin(-5, 0), [1, 2, 3, 4, 5]);
+
+// test on empty array
+assertDeepEq([].copyWithin(0, 3), []);
+
+// test with target range being shorter than end - start
+assertDeepEq([1, 2, 3, 4, 5].copyWithin(2, 1, 4), [1, 2, 2, 3, 4]);
+
+// test overlapping ranges
+arr = [1, 2, 3, 4, 5];
+arr.copyWithin(2, 1, 4);
+assertDeepEq(arr.copyWithin(2, 1, 4), [1, 2, 2, 2, 3]);
+
+// check that delete is strict
+arr = [1, , 3, , 4, 5];
+Object.freeze(arr);
+assertThrowsInstanceOf(function() {
+  arr.copyWithin(2, 1, 4);
+}, TypeError, "Assert that delete is strict in copyWithin");
+
+// test with a proxy object
+var proxyObj = {
+  get: function(recipient, name) {
+    return recipient[name] + 2;
+  }
+};
+
+var p = new Proxy([1, 2, 3, 4, 5], proxyObj);
+Array.prototype.copyWithin.call(p, 0, 3);
+for (name of Object.getOwnPropertyNames(p)) {
+    print(name + ": " + JSON.stringify(Object.getOwnPropertyDescriptor(p, name)));
+}
+
+assertDeepEq(p, [6, 7, , , 5]);
+
+// test if we throw in between
+arr = [1, 2, 3, 4, 5];
+Object.defineProperty(arr, 1, {
+  set: function () {
+    throw new Error("Boom!");
+  }
+});
+
+assertThrowsInstanceOf(function() {
+  arr.copyWithin(1, 3);
+}, Error, "Throwing in between.");
+assertEq(arr[0], 1);
+assertEq(arr[1], undefined);
+assertEq(arr[2], 3);
+assertEq(arr[3], 4);
+assertEq(arr[4], 5);
+
+// undefined as third argument
+assertDeepEq([1, 2, 3, 4, 5].copyWithin(0, 3, undefined), [4, 5, 3, 4, 5]);
+
+// test that this.length is called only once
+arr = {0: 1, 1: 2, 2: 3, 3: 4, 4: 5};
+var count = 0;
+Object.defineProperty(arr, "length", {
+  get: function () {
+    count++;
+  }
+});
+Array.prototype.copyWithin.call(arr, 1, 3);
+assertEq(count, 1);
+
+count = 0;
+Array.prototype.copyWithin.call(arr, 1, 3, 4);
+assertEq(count, 1);
+
+var large = 10000;
+
+// test on a large array
+arr = new Array(large);
+assertDeepEq(arr.copyWithin(45, 900), arr);
+
+// test on floating point numbers
+for (var i = 0; i < large; i++) {
+  arr[i] = Math.random();
+}
+arr.copyWithin(45, 900);
+
+// test on array of objects
+for (var i = 0; i < large; i++) {
+  arr[i] = { num: Math.random() };
+}
+arr.copyWithin(45, 900);
+
+// test array length remains same
+assertEq(arr.length, large);
+
+// test null on third argument is handled correctly
+assertDeepEq([1, 2, 3, 4, 5].copyWithin(0, 3, null), [1, 2, 3, 4, 5]);
+
+// tamper the global Object prototype and test this works
+Object.prototype[2] = 1;
+assertDeepEq([1, 2, 3, 4, 5].copyWithin(0, 3), [4, 5, 3, 4, 5]);