// Based on tests/ion/typed-arrays-1.js, but with string indexes function testInt8() { var arr1 = new Int8Array(50); var arr2 = new Uint8Array(50); var arr3 = new Uint8ClampedArray(50); for (var i=0; i<arr1.length; i++) { arr1[i] = arr2[i] = arr3[i] = i * 8; } var res = 0; for (var i=0; i<arr1.length; i++) { res += arr1[i+""] + arr2[i+""] + arr3[i+""] + arr2["10".concat("")]; } assertEq(res, 18334); } testInt8(); function testInt16() { var arr1 = new Int16Array(70); var arr2 = new Uint16Array(70); for (var i=0; i<arr1.length; i++) { arr1[i] = arr2[i] = i * 1000; } var res = 0; for (var i=0; i<arr1.length; i++) { res += arr1[i+""] + arr2[i+""] + arr2["1".concat("")] + arr1["3".concat("")]; } assertEq(res, 2423024); } testInt16(); function testInt32() { var arr = new Int32Array(60); arr[0] = -50; for (var i=1; i<arr.length; i++) { arr[i] = arr[(i-1)+""] + arr["0".concat("")]; ++arr[0]; } assertEq(arr[(arr.length-1)+""], -1289); } testInt32(); function testUint32() { function sum(arr) { var res = 0; for (var i=0; i<arr.length; i++) { res += arr[i+""]; } return res; } var arr = new Uint32Array(100); for (var i=0; i<arr.length; i++) { arr[i] = i; } // Compile sum() to read int32 values. assertEq(sum(arr), 4950); // Add a large uint32 so that the sum no longer fits in an // int32. sum() should be recompiled to return a double. arr[50] = 0xffffeeee; assertEq(sum(arr), 4294967826); } testUint32(); function testFloat() { var arr1 = new Float32Array(75); var arr2 = new Float64Array(75); arr1[0] = arr2[0] = Math.PI * 1234567.8; for (var i=1; i<75; i++) { arr1[i] = arr1[(i-1)+""] + arr1[0]; arr2[i] = arr2[(i-1)+""] + arr2[0]; } assertEq(arr1["74".concat("")] > 290888255, true); assertEq(arr1["74".concat("")] < 290888257, true); assertEq(arr2["74".concat("")] > 290888184, true); assertEq(arr2["74".concat("")] < 290888185, true); } testFloat(); function testCanonicalNaN() { // NaN values have to be canonicalized. Otherwise, malicious scripts could // construct arbitrary Value's (due to our NaN boxing Value representation). var buf = new ArrayBuffer(16); var uint32 = new Uint32Array(buf); var f64 = new Float64Array(buf); var f32 = new Float32Array(buf); // Evil: write a JSVAL_TYPE_OBJECT type tag... uint32[0] = 0xffffff87; uint32[1] = 0xffffff87; // Make sure this value is interpreted as a double. for (var i=0; i<3; i++) { assertEq(isNaN(f64["0".concat("")]), true); assertEq(isNaN(f32["0".concat("")]), true); } } testCanonicalNaN(); function testOutOfBounds() { var buf = new ArrayBuffer(16); var uint32 = new Uint32Array(buf); uint32[0] = 0; uint32[1] = 1; for (var i=0; i<3; i++) { assertEq(uint32["0".concat("")], 0); assertEq(uint32["1".concat("")], 1); assertEq(uint32["2".concat("")], 0); assertEq(uint32["17".concat("")], undefined); } } testOutOfBounds(); function testStrangeIndexes() { var buf = new ArrayBuffer(16); var uint32 = new Uint32Array(buf); uint32[0] = 0; uint32[1] = 1; indexes = ["0", "1", "2", "3", "17", "3.5", "NaN", "undefined", "null"]; solutions = [0, 1, 0, 0, undefined, undefined, undefined, undefined, undefined]; for (var i=0; i<indexes.length; i++) { assertEq(uint32[indexes[i]], solutions[i]); } } testStrangeIndexes();