Implement TypedArray.set function.

test/mjsunit/harmony/typedarrays.js

Index: test/mjsunit/harmony/typedarrays.js
diff --git a/test/mjsunit/harmony/typedarrays.js b/test/mjsunit/harmony/typedarrays.js
index a15a604b0b16cd45153503810fc55b74dfddd76c..ce4cbb0732bec075dd719780302c1d10327086e2 100644
--- a/test/mjsunit/harmony/typedarrays.js
+++ b/test/mjsunit/harmony/typedarrays.js
@@ -371,6 +371,92 @@ for(i = 0; i < typedArrayConstructors.lenght; i++) {
 }
 
 
+function TestTypedArraySet() {
+  // Test array.set in different combinations.
+
+  function assertArrayPrefix(expected, array) {
+    for (var i = 0; i < expected.length; ++i) {
+      assertEquals(expected[i], array[i]);
+    }
+  }
+
+  var a11 = new Int16Array([1, 2, 3, 4, 0, -1])
+  var a12 = new Uint16Array(15)
+  a12.set(a11, 3)
+  assertArrayPrefix([0, 0, 0, 1, 2, 3, 4, 0, 0xffff, 0, 0], a12)
+  assertThrows(function(){ a11.set(a12) })
+
+  var a21 = [1, undefined, 10, NaN, 0, -1, {valueOf: function() {return 3}}]
+  var a22 = new Int32Array(12)
+  a22.set(a21, 2)
+  assertArrayPrefix([0, 0, 1, 0, 10, 0, 0, -1, 3, 0], a22)
+
+  var a31 = new Float32Array([2, 4, 6, 8, 11, NaN, 1/0, -3])
+  var a32 = a31.subarray(2, 6)
+  a31.set(a32, 4)
+  assertArrayPrefix([2, 4, 6, 8, 6, 8, 11, NaN], a31)
+  assertArrayPrefix([6, 8, 6, 8], a32)
+
+  var a4 = new Uint8ClampedArray([3,2,5,6])
+  a4.set(a4)
+  assertArrayPrefix([3, 2, 5, 6], a4)
+
+  // Cases with overlapping backing store but different element sizes.
+  var b = new ArrayBuffer(4)
+  var a5 = new Int16Array(b)
+  var a50 = new Int8Array(b)
+  var a51 = new Int8Array(b, 0, 2)
+  var a52 = new Int8Array(b, 1, 2)
+  var a53 = new Int8Array(b, 2, 2)
+
+  a5.set([0x5050, 0x0a0a])
+  assertArrayPrefix([0x50, 0x50, 0x0a, 0x0a], a50)
+  assertArrayPrefix([0x50, 0x50], a51)
+  assertArrayPrefix([0x50, 0x0a], a52)
+  assertArrayPrefix([0x0a, 0x0a], a53)
+
+  a50.set([0x50, 0x50, 0x0a, 0x0a])
+  a51.set(a5)
+  assertArrayPrefix([0x50, 0x0a, 0x0a, 0x0a], a50)
+
+  a50.set([0x50, 0x50, 0x0a, 0x0a])
+  a52.set(a5)
+  assertArrayPrefix([0x50, 0x50, 0x0a, 0x0a], a50)
+
+  a50.set([0x50, 0x50, 0x0a, 0x0a])
+  a53.set(a5)
+  assertArrayPrefix([0x50, 0x50, 0x50, 0x0a], a50)
+
+  a50.set([0x50, 0x51, 0x0a, 0x0b])
+  a5.set(a51)
+  assertArrayPrefix([0x0050, 0x0051], a5)
+
+  a50.set([0x50, 0x51, 0x0a, 0x0b])
+  a5.set(a52)
+  assertArrayPrefix([0x0051, 0x000a], a5)
+
+  a50.set([0x50, 0x51, 0x0a, 0x0b])
+  a5.set(a53)
+  assertArrayPrefix([0x000a, 0x000b], a5)
+
+  // Mixed types of same size.
+  var a61 = new Float32Array([1.2, 12.3])
+  var a62 = new Int32Array(2)
+  a62.set(a61)
+  assertArrayPrefix([1, 12], a62)
+  a61.set(a62)
+  assertArrayPrefix([1, 12], a61)
+
+  // Invalid source
+  var a = new Uint16Array(50);
+  assertThrows(function() { a.set(0) }, TypeError);
+  assertThrows(function() { a.set({}) }, TypeError);
+  assertThrows(function() { a.set.call({}) }, TypeError);
+  assertThrows(function() { a.set.call(0) }, TypeError);

[rossberg, 2013/05/07 14:31:45]

More interestingly, maybe add a case for []

+}
+
+TestTypedArraySet();
+
 // General tests for properties
 
 // Test property attribute [[Enumerable]]