1 files changed, 55 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/TypedArrayConstructors/from/new-instance-from-ordinary-object.js b/js/src/tests/test262/built-ins/TypedArrayConstructors/from/new-instance-from-ordinary-object.js
new file mode 100644
index 0000000000..b49dc011ef
--- /dev/null
+++ b/js/src/tests/test262/built-ins/TypedArrayConstructors/from/new-instance-from-ordinary-object.js
@@ -0,0 +1,55 @@
+// 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%.from
+description: >
+  Return a new TypedArray from an ordinary object
+includes: [testTypedArray.js]
+features: [Array.prototype.values, TypedArray]
+---*/
+
+var source = {
+  "0": 42,
+  "2": 44,
+  length: 4
+};
+
+testWithTypedArrayConstructors(function(TA) {
+  var result = TA.from(source);
+
+  assert.sameValue(result.length, 4);
+  assert.sameValue(result[0], 42);
+  assert.sameValue(result[1], NaN);
+  assert.sameValue(result[2], 44);
+  assert.sameValue(result[3], NaN);
+  assert.sameValue(result.constructor, TA);
+  assert.sameValue(Object.getPrototypeOf(result), TA.prototype);
+},
+[
+  Float32Array,
+  Float64Array
+]);
+
+testWithTypedArrayConstructors(function(TA) {
+  var result = TA.from(source);
+
+  assert.sameValue(result.length, 4);
+  assert.sameValue(result[0], 42);
+  assert.sameValue(result[1], 0);
+  assert.sameValue(result[2], 44);
+  assert.sameValue(result[3], 0);
+  assert.sameValue(result.constructor, TA);
+  assert.sameValue(Object.getPrototypeOf(result), TA.prototype);
+},
+[
+  Int8Array,
+  Int32Array,
+  Int16Array,
+  Int8Array,
+  Uint32Array,
+  Uint16Array,
+  Uint8Array,
+  Uint8ClampedArray
+]);
+
+reportCompare(0, 0);