Migrate %TypedArray%.prototype.fill to C++

test/mjsunit/es6/typedarray-fill.js

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 var typedArrayConstructors = [
   Uint8Array,
   Int8Array,
   Uint16Array,
   Int16Array,
   Uint32Array,
   Int32Array,
   Uint8ClampedArray,
   Float32Array,
   Float64Array];
 
 for (var constructor of typedArrayConstructors) {
   assertEquals(1, constructor.prototype.fill.length);
 
-  assertArrayEquals(new constructor([]).fill(8), []);
-  assertArrayEquals(new constructor([0, 0, 0, 0, 0]).fill(8), [8, 8, 8, 8, 8]);
-  assertArrayEquals(new constructor([0, 0, 0, 0, 0]).fill(8, 1), [0, 8, 8, 8, 8]);
-  assertArrayEquals(new constructor([0, 0, 0, 0, 0]).fill(8, 10), [0, 0, 0, 0, 0]);
-  assertArrayEquals(new constructor([0, 0, 0, 0, 0]).fill(8, -5), [8, 8, 8, 8, 8]);
-  assertArrayEquals(new constructor([0, 0, 0, 0, 0]).fill(8, 1, 4), [0, 8, 8, 8, 0]);
-  assertArrayEquals(new constructor([0, 0, 0, 0, 0]).fill(8, 1, -1), [0, 8, 8, 8, 0]);
-  assertArrayEquals(new constructor([0, 0, 0, 0, 0]).fill(8, 1, 42), [0, 8, 8, 8, 8]);
-  assertArrayEquals(new constructor([0, 0, 0, 0, 0]).fill(8, -3, 42), [0, 0, 8, 8, 8]);
-  assertArrayEquals(new constructor([0, 0, 0, 0, 0]).fill(8, -3, 4), [0, 0, 8, 8, 0]);
-  assertArrayEquals(new constructor([0, 0, 0, 0, 0]).fill(8, -2, -1), [0, 0, 0, 8, 0]);
-  assertArrayEquals(new constructor([0, 0, 0, 0, 0]).fill(8, -1, -3), [0, 0, 0, 0, 0]);
-  assertArrayEquals(new constructor([0, 0, 0, 0, 0]).fill(8, 0, 4), [8, 8, 8, 8, 0]);
+  assertArrayEquals([], new constructor([]).fill(8));
+  assertArrayEquals([8, 8, 8, 8, 8], new constructor([0, 0, 0, 0, 0]).fill(8));
+  assertArrayEquals([0, 8, 8, 8, 8], new constructor([0, 0, 0, 0, 0]).fill(8, 1));
+  assertArrayEquals([0, 0, 0, 0, 0], new constructor([0, 0, 0, 0, 0]).fill(8, 10));
+  assertArrayEquals([8, 8, 8, 8, 8], new constructor([0, 0, 0, 0, 0]).fill(8, -5));
+  assertArrayEquals([0, 8, 8, 8, 0], new constructor([0, 0, 0, 0, 0]).fill(8, 1, 4));
+  assertArrayEquals([0, 8, 8, 8, 0], new constructor([0, 0, 0, 0, 0]).fill(8, 1, -1));
+  assertArrayEquals([0, 8, 8, 8, 8], new constructor([0, 0, 0, 0, 0]).fill(8, 1, 42));
+  assertArrayEquals([0, 0, 8, 8, 8], new constructor([0, 0, 0, 0, 0]).fill(8, -3, 42));
+  assertArrayEquals([0, 0, 8, 8, 0], new constructor([0, 0, 0, 0, 0]).fill(8, -3, 4));
+  assertArrayEquals([0, 0, 0, 8, 0], new constructor([0, 0, 0, 0, 0]).fill(8, -2, -1));
+  assertArrayEquals([0, 0, 0, 0, 0], new constructor([0, 0, 0, 0, 0]).fill(8, -1, -3));
+  assertArrayEquals([8, 8, 8, 8, 0], new constructor([0, 0, 0, 0, 0]).fill(8, 0, 4));
+
+  assertArrayEquals([0, 0, 0, 0, 0], new constructor([0, 0, 0, 0, 0]).fill(8, Infinity));
+  assertArrayEquals([8, 8, 8, 8, 8], new constructor([0, 0, 0, 0, 0]).fill(8, -Infinity));
+  assertArrayEquals([8, 8, 8, 8, 8], new constructor([0, 0, 0, 0, 0]).fill(8, 0, Infinity));
+  assertArrayEquals([0, 0, 0, 0, 0], new constructor([0, 0, 0, 0, 0]).fill(8, 0, -Infinity));
 
   // Test exceptions
   assertThrows('constructor.prototype.fill.call(null)', TypeError);
   assertThrows('constructor.prototype.fill.call(undefined)', TypeError);
   assertThrows('constructor.prototype.fill.call([])', TypeError);
 
+  // Test ToNumber
+  var s = "";
+  var p = new Proxy({}, {get(t,k) { s += k.toString() + '\n'; return Reflect.get(t, k)}})
+  new constructor(3).fill(p);
+  assertEquals(s, `Symbol(Symbol.toPrimitive)
+valueOf
+toString
+Symbol(Symbol.toStringTag)
+Symbol(Symbol.toPrimitive)
+valueOf
+toString
+Symbol(Symbol.toStringTag)
+Symbol(Symbol.toPrimitive)
+valueOf
+toString
+Symbol(Symbol.toStringTag)
+`);
+
   // Shadowing length doesn't affect fill, unlike Array.prototype.fill
   var a = new constructor([2, 2]);
   Object.defineProperty(a, 'length', {value: 1});
   a.fill(3);
-  assertArrayEquals([a[0], a[1]], [3, 3]);
+  assertArrayEquals([3, 3], [a[0], a[1]]);
   Array.prototype.fill.call(a, 4);
-  assertArrayEquals([a[0], a[1]], [4, 3]);
+  assertArrayEquals([4, 3], [a[0], a[1]]);
 }
+
+// Empty args
+assertArrayEquals([0], new Uint8Array([0]).fill());
+assertArrayEquals([NaN], new Float32Array([0]).fill());
+
+// Clamping
+assertArrayEquals([0, 0, 0, 0, 0], new Uint8ClampedArray([0, 0, 0, 0, 0]).fill(-10));
+assertArrayEquals([255, 255, 255, 255, 255], new Uint8ClampedArray([0, 0, 0, 0, 0]).fill(1000));
+
+assertArrayEquals([1, 1, 1, 1, 1], new Uint8ClampedArray([0, 0, 0, 0, 0]).fill(0.50001));
+assertArrayEquals([0, 0, 0, 0, 0], new Uint8ClampedArray([0, 0, 0, 0, 0]).fill(0.50000));
+assertArrayEquals([0, 0, 0, 0, 0], new Uint8ClampedArray([0, 0, 0, 0, 0]).fill(0.49999));
+// Check round half to even
+assertArrayEquals([2, 2, 2, 2, 2], new Uint8ClampedArray([0, 0, 0, 0, 0]).fill(1.50000));
+assertArrayEquals([2, 2, 2, 2, 2], new Uint8ClampedArray([0, 0, 0, 0, 0]).fill(2.50000));
+assertArrayEquals([3, 3, 3, 3, 3], new Uint8ClampedArray([0, 0, 0, 0, 0]).fill(2.50001));
+// Check infinity clamping.
+assertArrayEquals([0, 0, 0, 0, 0], new Uint8ClampedArray([0, 0, 0, 0, 0]).fill(-Infinity));
+assertArrayEquals([255, 255, 255, 255, 255], new Uint8ClampedArray([0, 0, 0, 0, 0]).fill(Infinity));