Add m-esr52 at 52.6.0

1 files changed, 14 insertions, 0 deletions

diff --git a/js/src/jit-test/tests/collections/Map-constructor-1.js b/js/src/jit-test/tests/collections/Map-constructor-1.js
new file mode 100644
index 000000000..b1a55967d
--- /dev/null
+++ b/js/src/jit-test/tests/collections/Map-constructor-1.js
@@ -0,0 +1,14 @@
+// The Map constructor creates an empty Map by default.
+
+load(libdir + "asserts.js");
+
+var m = new Map();
+assertEq(m.size, 0);
+m = new Map(undefined);
+assertEq(m.size, 0);
+m = new Map(null);
+assertEq(m.size, 0);
+
+assertThrowsInstanceOf(() => Map(), TypeError);
+assertThrowsInstanceOf(() => Map(undefined), TypeError);
+assertThrowsInstanceOf(() => Map(null), TypeError);