testArrayBufferSlice.js (1729B)
1 function testSlice() { 2 function test(subBuf, starts, size) { 3 var byteLength = size; 4 var subBuffer = eval(subBuf); 5 var subArray = new Int8Array(subBuffer); 6 assertEq(subBuffer.byteLength, byteLength); 7 for (var i = 0; i < size; ++i) 8 assertEq(starts + i, subArray[i]); 9 } 10 11 var buffer = new ArrayBuffer(32); 12 var array = new Int8Array(buffer); 13 for (var i = 0; i < 32; ++i) 14 array[i] = i; 15 16 test("buffer.slice(0)", 0, 32); 17 test("buffer.slice(16)", 16, 16); 18 test("buffer.slice(24)", 24, 8); 19 test("buffer.slice(32)", 32, 0); 20 test("buffer.slice(40)", 32, 0); 21 test("buffer.slice(80)", 32, 0); 22 23 test("buffer.slice(-8)", 24, 8); 24 test("buffer.slice(-16)", 16, 16); 25 test("buffer.slice(-24)", 8, 24); 26 test("buffer.slice(-32)", 0, 32); 27 test("buffer.slice(-40)", 0, 32); 28 test("buffer.slice(-80)", 0, 32); 29 30 test("buffer.slice(0, 32)", 0, 32); 31 test("buffer.slice(0, 16)", 0, 16); 32 test("buffer.slice(8, 24)", 8, 16); 33 test("buffer.slice(16, 32)", 16, 16); 34 test("buffer.slice(24, 16)", 24, 0); 35 36 test("buffer.slice(16, -8)", 16, 8); 37 test("buffer.slice(-20, 30)", 12, 18); 38 39 test("buffer.slice(-8, -20)", 24, 0); 40 test("buffer.slice(-20, -8)", 12, 12); 41 test("buffer.slice(-40, 16)", 0, 16); 42 test("buffer.slice(-40, 40)", 0, 32); 43 44 gczeal(7, 100000); 45 var nurseryBuf = new ArrayBuffer(32); 46 var arr = new Int8Array(nurseryBuf); 47 arr[0] = 77; 48 49 // tenure nurseryBuf during the slice operation 50 nurseryBuf.slice; // Creates an object 51 schedulegc(1); 52 var newbuf = nurseryBuf.slice(0); 53 var arr2 = new Int8Array(newbuf); 54 assertEq(arr2[0], 77); 55 } 56 57 testSlice();