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function testValue() {
function f(arr, x) {
return arr[x];
}
var a = [1, undefined, null, Math, 2.1, ""];
for (var i=0; i<50; i++) {
assertEq(f(a, 0), 1);
assertEq(f(a, 1), undefined);
assertEq(f(a, 2), null);
assertEq(f(a, 3), Math);
assertEq(f(a, 4), 2.1);
assertEq(f(a, 5), "");
assertEq(f(a, -1), undefined);
assertEq(f(a, 6), undefined);
}
}
testValue();
function testOutOfBounds() {
function f(arr, x) {
return arr[x];
}
var a = [0, 1, 2, 3, 4];
for (var j=0; j<4; j++) {
for (var i=0; i<5; i++) {
assertEq(f(a, i), i);
}
for (var i=5; i<10; i++) {
assertEq(f(a, i), undefined);
}
for (var i=-1; i>-10; i--) {
assertEq(f(a, i), undefined);
}
}
}
testOutOfBounds();
function testHole() {
function f(arr, x) {
return arr[x];
}
var a = [0, , 2, ];
for (var i=0; i<70; i++) {
assertEq(f(a, 0), 0);
assertEq(f(a, 1), undefined);
assertEq(f(a, 2), 2);
assertEq(f(a, 3), undefined);
}
}
testHole();
function testClassGuard() {
function f(arr) {
return arr[2];
}
var a = [1, 2, 3, 4];
for (var i=0; i<90; i++) {
assertEq(f(a), 3);
}
var b = {2: 100};
assertEq(f(b), 100);
}
testClassGuard();
function testGeneric1() {
function f(o, i) {
return o[i];
}
for (var i=0; i<100; i++) {
assertEq(f("abc", 1), "b");
assertEq(f("foo", "length"), 3);
assertEq(f([], -1), undefined);
assertEq(f({x: 1}, "x"), 1);
}
}
testGeneric1();