Add m-esr52 at 52.6.0

1 files changed, 17 insertions, 0 deletions

diff --git a/js/src/jit-test/tests/collections/Map-iterator-pairs-1.js b/js/src/jit-test/tests/collections/Map-iterator-pairs-1.js
new file mode 100644
index 000000000..2a8e49d89
--- /dev/null
+++ b/js/src/jit-test/tests/collections/Map-iterator-pairs-1.js
@@ -0,0 +1,17 @@
+// mapiter.next() returns an actual array.
+
+load(libdir + "iteration.js");
+
+var key = {};
+var map = new Map([[key, 'value']]);
+var entry = map[Symbol.iterator]().next().value;
+assertEq(Array.isArray(entry), true);
+assertEq(Object.getPrototypeOf(entry), Array.prototype);
+assertEq(Object.isExtensible(entry), true);
+
+assertEq(entry.length, 2);
+var names = Object.getOwnPropertyNames(entry).sort();
+assertEq(names.length, 3);
+assertEq(names.join(","), "0,1,length");
+assertEq(entry[0], key);
+assertEq(entry[1], 'value');