Source code
Revision control
Copy as Markdown
Other Tools
// Test some double-truncation edge cases with parseInt(double).
function testPos1() {
with({}) {}
var fun = d => parseInt(d);
for (var i = 0; i < 2000; i++) {
assertEq(fun(i + 0.5), i);
}
assertEq(fun(0xf_ffff_ffff) + 345, 68719477080);
}
testPos1();
function testPos2() {
with({}) {}
var fun = d => parseInt(d);
for (var i = 0; i < 2000; i++) {
assertEq(fun(i + 0.5), i);
}
assertEq(fun(0x8000_0000) + 345, 2147483993);
}
testPos2();
function testNeg1() {
with({}) {}
var fun = d => parseInt(d);
for (var i = 0; i < 2000; i++) {
assertEq(fun(i + 0.5), i);
}
assertEq(fun(-0xf_ffff_ffff) - 345, -68719477080);
}
testNeg1();
function testNeg2() {
with({}) {}
var fun = d => parseInt(d);
for (var i = 0; i < 2000; i++) {
assertEq(fun(i + 0.5), i);
}
assertEq(fun(-0x8000_0001) - 345, -2147483994);
}
testNeg2();