Add m-esr52 at 52.6.0

1 files changed, 37 insertions, 0 deletions

diff --git a/js/src/jit-test/tests/arrays/slice.js b/js/src/jit-test/tests/arrays/slice.js
new file mode 100644
index 000000000..ad4f66f63
--- /dev/null
+++ b/js/src/jit-test/tests/arrays/slice.js
@@ -0,0 +1,37 @@
+let invoked = false;
+Object.defineProperty(Array.prototype, '0', {set: function () {
+    invoked = true;
+}});
+
+let result = [1, 2, 3].slice(1);
+assertEq(invoked, false);
+
+let proxy = new Proxy({}, {
+    get: function (target, name, proxy) {
+        switch (name) {
+          case "length":
+            return 2;
+          case "0":
+            return 15;
+          case "1":
+            // Should not invoke [[Get]] for this hole.
+          default:
+            assertEq(false, true);
+        }
+    },
+    has: function (target, name) {
+        switch (name) {
+          case "0":
+            return true;
+          case "1":
+            return false;
+          default:
+            assertEq(false, true);
+        }
+    }
+})
+result = Array.prototype.slice.call(proxy, 0);
+assertEq(result.length, 2);
+assertEq(0 in result, true);
+assertEq(1 in result, false);
+assertEq(result[0], 15);