1 files changed, 56 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/TypedArray/prototype/map/speciesctor-get-species-use-default-ctor.js b/js/src/tests/test262/built-ins/TypedArray/prototype/map/speciesctor-get-species-use-default-ctor.js
new file mode 100644
index 0000000000..1f69a5f099
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+++ b/js/src/tests/test262/built-ins/TypedArray/prototype/map/speciesctor-get-species-use-default-ctor.js
@@ -0,0 +1,56 @@
+// Copyright (C) 2018 Peter Wong. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-%typedarray%.prototype.map
+description: >
+  Use defaultConstructor if @@species is either undefined or null
+info: |
+  22.2.3.19 %TypedArray%.prototype.map ( callbackfn [ , thisArg ] )
+
+  ...
+  6. Let A be ? TypedArraySpeciesCreate(O, « len »).
+  ...
+
+  22.2.4.7 TypedArraySpeciesCreate ( exemplar, argumentList )
+
+  ...
+  3. Let constructor be ? SpeciesConstructor(exemplar, defaultConstructor).
+  ...
+
+  7.3.20 SpeciesConstructor ( O, defaultConstructor )
+
+  ...
+  5. Let S be ? Get(C, @@species).
+  6. If S is either undefined or null, return defaultConstructor.
+  ...
+includes: [testTypedArray.js]
+features: [Symbol.species, TypedArray]
+---*/
+
+testWithTypedArrayConstructors(function(TA) {
+  var sample = new TA(2);
+  var result;
+
+  sample.constructor = {};
+
+  result = sample.map(function() {});
+
+  assert.sameValue(
+    Object.getPrototypeOf(result),
+    Object.getPrototypeOf(sample),
+    "undefined @@species - prototype check "
+  );
+  assert.sameValue(result.constructor, TA, "undefined @@species - ctor check");
+
+  sample.constructor[Symbol.species] = null;
+  result = sample.map(function() {});
+
+  assert.sameValue(
+    Object.getPrototypeOf(result),
+    Object.getPrototypeOf(sample),
+    "null @@species - prototype check "
+  );
+  assert.sameValue(result.constructor, TA, "null @@species - ctor check");
+});
+
+reportCompare(0, 0);