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(function() {
"use strict";
// SERVER-20332 make JS NumberLong more robust
//
// Make sure swapping floatApprox, top and bottom don't break NumberLong
// Picking 2^54 because it's representable as a double (as a power of
// two), but big enough that the NumberLong code doesn't know it (numbers
// over 2^53 can lose precision)
var number = NumberLong("18014398509481984");
{
// Make sure all elements in a new NumberLong are valid
assert.eq(number.floatApprox, 18014398509481984);
assert.eq(number.top, 4194304);
assert.eq(number.bottom, 0);
assert.eq(number.valueOf(), 18014398509481984);
}
{
// Make sure that floatApprox, top and bottom cannot be set
assert.throws(function() {
number.floatApprox = "a";
}, [], "floatApprox should not be setable.");
assert.throws(function() {
number.top = "a";
}, [], "top should not be setable.");
assert.throws(function() {
number.bottom = "a";
}, [], "bottom should not be setable.");
}
{
// Make sure we fall back to floatApprox
delete number.top;
delete number.bottom;
assert.eq(number.valueOf(), 18014398509481984);
}
})();
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