Implement %TypedArray%.{fill,find,findIndex}

test/mjsunit/harmony/typedarray-findindex.js

+// Copyright 2014 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.
+
+// Flags: --harmony-arrays
+
+var typedArrayConstructors = [
+  Uint8Array,
+  Int8Array,
+  Uint16Array,
+  Int16Array,
+  Uint32Array,
+  Int32Array,
+  Uint8ClampedArray,
+  Float32Array,
+  Float64Array];
+
+for (var constructor of typedArrayConstructors) {
+
+assertEquals(1, constructor.prototype.findIndex.length);
+
+var a = new constructor([21, 22, 23, 24]);
+assertEquals(-1, a.findIndex(function() { return false; }));
+assertEquals(-1, a.findIndex(function(val) { return 121 === val; }));
+assertEquals(0, a.findIndex(function() { return true; }));
+assertEquals(1, a.findIndex(function(val) { return 22 === val; }), undefined);
+assertEquals(2, a.findIndex(function(val) { return 23 === val; }), null);
+assertEquals(3, a.findIndex(function(val) { return 24 === val; }));
+
+
+//
+// Test predicate is not called when array is empty
+//
+(function() {
+  var a = new constructor([]);
+  var l = -1;
+  var o = -1;
+  var v = -1;
+  var k = -1;
+
+  a.findIndex(function(val, key, obj) {
+    o = obj;
+    l = obj.length;
+    v = val;
+    k = key;
+
+    return false;
+  });
+
+  assertEquals(-1, l);
+  assertEquals(-1, o);
+  assertEquals(-1, v);
+  assertEquals(-1, k);
+})();
+
+
+//
+// Test predicate is called with correct argumetns
+//
+(function() {
+  var a = new constructor([5]);
+  var l = -1;
+  var o = -1;
+  var v = -1;
+  var k = -1;
+
+  var index = a.findIndex(function(val, key, obj) {
+    o = obj;
+    l = obj.length;
+    v = val;
+    k = key;
+
+    return false;
+  });
+
+  assertArrayEquals(a, o);
+  assertEquals(a.length, l);
+  assertEquals(5, v);
+  assertEquals(0, k);
+  assertEquals(-1, index);
+})();
+
+
+//
+// Test predicate is called array.length times
+//
+(function() {
+  var a = new constructor([1, 2, 3, 4, 5]);
+  var l = 0;
+
+  a.findIndex(function() {
+    l++;
+    return false;
+  });
+
+  assertEquals(a.length, l);
+})();
+
+
+//
+// Test array modifications
+//
+(function() {
+  a = new constructor([1, 2, 3]);
+  a.findIndex(function(val, key) { a[key] = ++val; return false; });
+  assertArrayEquals([2, 3, 4], a);
+  assertEquals(3, a.length);
+})();
+
+
+//
+// Test thisArg
+//
+(function() {
+  // Test String as a thisArg
+  var index = new constructor([1, 2, 3]).findIndex(function(val, key) {
+    return this.charAt(Number(key)) === String(val);
+  }, "321");
+  assertEquals(1, index);
+
+  // Test object as a thisArg
+  var thisArg = {
+    elementAt: function(key) {
+      return this[key];
+    }
+  };
+  Array.prototype.push.apply(thisArg, [3, 2, 1]);
+
+  index = new constructor([1, 2, 3]).findIndex(function(val, key) {
+    return this.elementAt(key) === val;
+  }, thisArg);
+  assertEquals(1, index);
+
+  // Create a new object in each function call when receiver is a
+  // primitive value. See ECMA-262, Annex C.
+  a = [];
+  new constructor([1, 2]).findIndex(function() { a.push(this) }, "");
+  assertTrue(a[0] !== a[1]);
+
+  // Do not create a new object otherwise.
+  a = [];
+  new constructor([1, 2]).findIndex(function() { a.push(this) }, {});
+  assertEquals(a[0], a[1]);
+
+  // In strict mode primitive values should not be coerced to an object.
+  a = [];
+  new constructor([1, 2]).findIndex(function() { 'use strict'; a.push(this); }, "");
+  assertEquals("", a[0]);
+  assertEquals(a[0], a[1]);
+
+})();
+
+// Test exceptions
+assertThrows('constructor.prototype.findIndex.call(null, function() { })',
+  TypeError);
+assertThrows('constructor.prototype.findIndex.call(undefined, function() { })',
+  TypeError);
+assertThrows('constructor.prototype.findIndex.apply(null, function() { }, [])',
+  TypeError);
+assertThrows('constructor.prototype.findIndex.apply(undefined, function() { }, [])',
+  TypeError);
+assertThrows('constructor.prototype.findIndex.apply([], function() { }, [])',
+  TypeError);
+assertThrows('constructor.prototype.findIndex.apply({}, function() { }, [])',
+  TypeError);
+assertThrows('constructor.prototype.findIndex.apply("", function() { }, [])',
+  TypeError);
+
+assertThrows('new constructor([]).findIndex(null)', TypeError);
+assertThrows('new constructor([]).findIndex(undefined)', TypeError);
+assertThrows('new constructor([]).findIndex(0)', TypeError);
+assertThrows('new constructor([]).findIndex(true)', TypeError);
+assertThrows('new constructor([]).findIndex(false)', TypeError);
+assertThrows('new constructor([]).findIndex("")', TypeError);
+assertThrows('new constructor([]).findIndex({})', TypeError);
+assertThrows('new constructor([]).findIndex([])', TypeError);
+assertThrows('new constructor([]).findIndex(/\d+/)', TypeError);
+
+}