Add m-esr52 at 52.6.0

1 files changed, 66 insertions, 0 deletions

diff --git a/js/src/tests/ecma_6/Reflect/ownKeys.js b/js/src/tests/ecma_6/Reflect/ownKeys.js
new file mode 100644
index 000000000..5433562eb
--- /dev/null
+++ b/js/src/tests/ecma_6/Reflect/ownKeys.js
@@ -0,0 +1,66 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/ */
+
+// Reflect.ownKeys(obj) returns an array of an object's own property keys.
+
+// Test that Reflect.ownKeys gets the expected result when applied to various
+// objects. (These tests also check the basics: that the result is an array,
+// that its prototype is correct, etc.)
+var sym = Symbol.for("comet");
+var sym2 = Symbol.for("meteor");
+var cases = [
+    {object: {z: 3, y: 2, x: 1},
+     keys: ["z", "y", "x"]},
+    {object: [],
+     keys: ["length"]},
+    {object: new Int8Array(4),
+     keys: ["0", "1", "2", "3"]},
+    {object: new Proxy({a: 7}, {}),
+     keys: ["a"]},
+    {object: {[sym]: "ok"},
+     keys: [sym]},
+    {object: {[sym]: 0,  // test 9.1.12 ordering
+              "str": 0,
+              "773": 0,
+              "0": 0,
+              [sym2]: 0,
+              "-1": 0,
+              "8": 0,
+              "second str": 0},
+     keys: ["0", "8", "773",  // indexes in numeric order
+            "str", "-1", "second str", // strings in insertion order
+            sym, sym2]}, // symbols in insertion order
+    {object: newGlobal().Math,  // cross-compartment wrapper
+     keys: Reflect.ownKeys(Math)}
+];
+for (var {object, keys} of cases)
+    assertDeepEq(Reflect.ownKeys(object), keys);
+
+// Reflect.ownKeys() creates a new array each time it is called.
+var object = {}, keys = [];
+for (var i = 0; i < 3; i++) {
+    var newKeys = Reflect.ownKeys(object);
+    assertEq(newKeys !== keys, true);
+    keys = newKeys;
+}
+
+// Proxy behavior with successful ownKeys() handler
+keys = ["str", "0"];
+obj = {};
+proxy = new Proxy(obj, {
+    ownKeys() { return keys; }
+});
+var actual = Reflect.ownKeys(proxy);
+assertDeepEq(actual, keys);  // we get correct answers
+assertEq(actual !== keys, true);  // but not the same object
+
+// If a proxy breaks invariants, a TypeError is thrown.
+var obj = Object.preventExtensions({});
+var proxy = new Proxy(obj, {
+    ownKeys() { return ["something"]; }
+});
+assertThrowsInstanceOf(() => Reflect.ownKeys(proxy), TypeError);
+
+// For more Reflect.ownKeys tests, see target.js.
+
+reportCompare(0, 0);