1 files changed, 52 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/flatMap/array-like-objects-typedarrays.js b/js/src/tests/test262/built-ins/Array/prototype/flatMap/array-like-objects-typedarrays.js
new file mode 100644
index 0000000000..6215e4d2d9
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/flatMap/array-like-objects-typedarrays.js
@@ -0,0 +1,52 @@
+// Copyright (C) 2018 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-array.prototype.flatMap
+description: >
+  array-like objects can be flattened (typedArrays)
+info: |
+  Array.prototype.flatMap ( mapperFunction [ , thisArg ] )
+
+  1. Let O be ? ToObject(this value).
+  2. Let sourceLen be ? ToLength(? Get(O, "length")).
+  ...
+  5. Let A be ? ArraySpeciesCreate(O, 0).
+  ...
+
+  ArraySpeciesCreate ( originalArray, length )
+
+  3. Let isArray be ? IsArray(originalArray).
+  4. If isArray is false, return ? ArrayCreate(length).
+  5. Let C be ? Get(originalArray, "constructor").
+includes: [compareArray.js]
+features: [Array.prototype.flatMap, Int32Array]
+---*/
+
+function same(e) {
+  return e;
+}
+
+var ta;
+var actual;
+
+ta = new Int32Array([1, 0, 42]);
+
+Object.defineProperty(ta, 'constructor', {
+  get() { throw "it should not object the typedarray ctor"; }
+});
+actual = [].flatMap.call(ta, same);
+assert.compareArray(actual, [1, 0, 42], 'The value of actual is expected to be [1, 0, 42]');
+assert.sameValue(Object.getPrototypeOf(actual), Array.prototype, 'Object.getPrototypeOf([].flatMap.call(ta, same)") returns Array.prototype');
+assert.sameValue(actual instanceof Int32Array, false, 'The result of evaluating (actual instanceof Int32Array) is expected to be false');
+
+ta = new Int32Array(0);
+
+Object.defineProperty(ta, 'constructor', {
+  get() { throw "it should not object the typedarray ctor"; }
+});
+actual = [].flatMap.call(ta, same);
+assert.compareArray(actual, [], 'The value of actual is expected to be []');
+assert.sameValue(Object.getPrototypeOf(actual), Array.prototype, 'Object.getPrototypeOf([].flatMap.call(ta, same)") returns Array.prototype');
+assert.sameValue(actual instanceof Int32Array, false, 'The result of evaluating (actual instanceof Int32Array) is expected to be false');
+
+reportCompare(0, 0);