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+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-%typedarray%.prototype.reduce
+description: >
+  Result can be of any type without any number conversions
+info: |
+  22.2.3.20 %TypedArray%.prototype.reduce ( callbackfn [ , initialValue ] )
+
+  %TypedArray%.prototype.reduce is a distinct function that implements the same
+  algorithm as Array.prototype.reduce as defined in 22.1.3.19 except that the
+  this object's [[ArrayLength]] internal slot is accessed in place of performing
+  a [[Get]] of "length".
+
+  22.1.3.19 Array.prototype.reduce ( callbackfn [ , initialValue ] )
+
+  ...
+  7. Else initialValue is not present,
+    ...
+    b. Repeat, while kPresent is false and k < len
+      ...
+      iii. If kPresent is true, then
+        1. Let accumulator be ? Get(O, Pk).
+      iv. Increase k by 1.
+    ...
+  8. Repeat, while k < len
+    ...
+    c. If kPresent is true, then
+      i. Let kValue be ? Get(O, Pk).
+      ii. Let accumulator be ? Call(callbackfn, undefined, « accumulator,
+      kValue, k, O »).
+  9. Return accumulator.
+includes: [testTypedArray.js]
+features: [Symbol, TypedArray]
+---*/
+
+testWithTypedArrayConstructors(function(TA) {
+  var sample = new TA([42, 43, 44]);
+  [
+    ["test262", "string"],
+    ["", "empty string"],
+    [undefined, "undefined"],
+    [null, "null"],
+    [-0, "-0"],
+    [42, "integer"],
+    [NaN, "NaN"],
+    [Infinity, "Infinity"],
+    [0.6, "float number"],
+    [true, "true"],
+    [false, "false"],
+    [Symbol(""), "symbol"],
+    [{}, "object"]
+  ].forEach(function(item) {
+    var result;
+
+    result = sample.reduce(function() {
+      return item[0];
+    });
+    assert.sameValue(result, item[0], item[1] + " - using default accumulator");
+
+    result = sample.reduce(function() {
+      return item[0];
+    }, 0);
+
+    assert.sameValue(result, item[0], item[1] + " - using custom accumulator");
+  });
+});
+
+reportCompare(0, 0);