diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/collections/Array-build-surfaces.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/collections/Array-build-surfaces.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,23 @@
+// Check superficial features of Array.build.
+
+if (getBuildConfiguration().parallelJS) {
+  load(libdir + "asserts.js");
+
+  var desc = Object.getOwnPropertyDescriptor(Array, "build");
+  assertEq(desc.configurable, true);
+  assertEq(desc.enumerable, false);
+  assertEq(desc.writable, true);
+  assertEq(Array.build.length, 2);
+  assertThrowsInstanceOf(() => new Array.build(), TypeError);  // not a constructor
+
+  // Must pass a function to second argument.
+  for (let v of [undefined, null, false, "cow"])
+    assertThrowsInstanceOf(() => Array.build(1, v), TypeError);
+
+  // The first argument must be a legal length.
+  assertThrowsInstanceOf(() => Array.build(-1, function() {}), RangeError);
+
+  // When the this-value passed in is not a constructor, the result is an array.
+  for (let v of [undefined, null, false, "cow"])
+    assertEq(Array.isArray(Array.build.call(v, 1, function() {})), true);
+}