[typedarrays] Move %TypedArray%.prototype.slice to C++

test/mjsunit/es6/typedarray-slice.js

Index: test/mjsunit/es6/typedarray-slice.js
diff --git a/test/mjsunit/es6/typedarray-slice.js b/test/mjsunit/es6/typedarray-slice.js
index ddd021a8fa9d9e30bafbbafd3b92b214acaf3f69..621bd48a9fbc8ab2cdc0ddfed2cfe8c74518caf3 100644
--- a/test/mjsunit/es6/typedarray-slice.js
+++ b/test/mjsunit/es6/typedarray-slice.js
@@ -68,4 +68,21 @@ for (var constructor of typedArrayConstructors) {
   assertEquals(2, slice[0]);
   assertEquals(3, slice[1]);
   assertTrue(slice instanceof constructor);
+
+  // Check that the result array is properly created by checking species

[Camillo Bruni, 2017/03/20 13:37:25]

Could you extend this and add specific tests with a subclass of each TypedArray?
I'd like to have coverage when and if you add all the special casing in
ElementsAccessor :).

[Choongwoo Han, 2017/03/21 12:39:03]

Done.

+  class MyFloat64Array extends Float64Array {
+    static get[Symbol.species]() {
+      return constructor;
+    }
+  }
+  var arr = new MyFloat64Array([-1.0, 0, 255, 256]);
+  assertEquals(new constructor([-1.0, 0, 255, 256]), arr.slice());
+
+  class MyTypedArray extends constructor {
+    static get[Symbol.species]() {
+      return Array;
+    }
+  }
+  var arr = new MyTypedArray([-1.0, 0, 255, 256]);
+  assertThrows(() => arr.slice(), TypeError);
 }