1 files changed, 37 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flat/non-object-ctor-throws.js b/js/src/tests/test262/built-ins/Array/prototype/flat/non-object-ctor-throws.js
new file mode 100644
index 0000000000..fe6886dcc1
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flat/non-object-ctor-throws.js
@@ -0,0 +1,37 @@
+// Copyright (C) 2018 Shilpi Jain and Michael Ficarra. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.flat
+description: >
+    Behavior when `constructor` property is neither an Object nor undefined
+    - if IsConstructor(C) is false, throw a TypeError exception.
+features: [Array.prototype.flat]
+---*/
+
+assert.sameValue(typeof Array.prototype.flat, 'function');
+
+var a = [];
+a.constructor = null;
+assert.throws(TypeError, function() {
+  a.flat();
+}, 'null value');
+
+a = [];
+a.constructor = 1;
+assert.throws(TypeError, function() {
+  a.flat();
+}, 'number value');
+
+a = [];
+a.constructor = 'string';
+assert.throws(TypeError, function() {
+  a.flat();
+}, 'string value');
+
+a = [];
+a.constructor = true;
+assert.throws(TypeError, function() {
+  a.flat();
+}, 'boolean value');
+
+reportCompare(0, 0);