Function
Generate functions.
compareBooleanFunc
Generate a comparison function taking two parameters a and b and producing a boolean value.
true means that a < b, false that a = b or a > b
Signatures:
fc.compareBooleanFunc()
Usages:
fc.compareBooleanFunc();
// Examples of generated values:
// • function(a, b) {
// // With hash and stringify coming from fast-check
// const cmp = (hA, hB) => hA < hB;
// const hA = hash('-29' + stringify(a)) % 17;
// const hB = hash('-29' + stringify(b)) % 17;
// return cmp(hA, hB);
// }
// • function(a, b) {
// // With hash and stringify coming from fast-check
// const cmp = (hA, hB) => hA < hB;
// const hA = hash('524475365' + stringify(a)) % 3037322393;
// const hB = hash('524475365' + stringify(b)) % 3037322393;
// return cmp(hA, hB);
// }
// • function(a, b) {
// // With hash and stringify coming from fast-check
// const cmp = (hA, hB) => hA < hB;
// const hA = hash('-29' + stringify(a)) % 2516443298;
// const hB = hash('-29' + stringify(b)) % 2516443298;
// return cmp(hA, hB);
// }
// • function(a, b) {
// // With hash and stringify coming from fast-check
// const cmp = (hA, hB) => hA < hB;
// const hA = hash('2126217969' + stringify(a)) % 3737752172;
// const hB = hash('2126217969' + stringify(b)) % 3737752172;
// return cmp(hA, hB);
// }
// • function(a, b) {
// // With hash and stringify coming from fast-check
// const cmp = (hA, hB) => hA < hB;
// const hA = hash('-480068351' + stringify(a)) % 3671794935;
// const hB = hash('-480068351' + stringify(b)) % 3671794935;
// return cmp(hA, hB);
// }
// • …
Resources: API reference.
Available since 1.6.0.
compareFunc
Generate a comparison function taking two parameters a and b and producing an integer value.
Output is zero when a and b are considered to be equivalent. Output is strictly inferior to zero means that a should be considered strictly inferior to b (similar for strictly superior to zero)
Signatures:
fc.compareFunc()
Usages:
fc.compareFunc();
// Examples of generated values:
// • function(a, b) {
// // With hash and stringify coming from fast-check
// const cmp = (hA, hB) => hA - hB;
// const hA = hash('-1057705109' + stringify(a)) % 2425734305;
// const hB = hash('-1057705109' + stringify(b)) % 2425734305;
// return cmp(hA, hB);
// }
// • function(a, b) {
// // With hash and stringify coming from fast-check
// const cmp = (hA, hB) => hA - hB;
// const hA = hash('-13' + stringify(a)) % 20;
// const hB = hash('-13' + stringify(b)) % 20;
// return cmp(hA, hB);
// }
// • function(a, b) {
// // With hash and stringify coming from fast-check
// const cmp = (hA, hB) => hA - hB;
// const hA = hash('2004846960' + stringify(a)) % 2464093828;
// const hB = hash('2004846960' + stringify(b)) % 2464093828;
// return cmp(hA, hB);
// }
// • function(a, b) {
// // With hash and stringify coming from fast-check
// const cmp = (hA, hB) => hA - hB;
// const hA = hash('1384924905' + stringify(a)) % 2242944706;
// const hB = hash('1384924905' + stringify(b)) % 2242944706;
// return cmp(hA, hB);
// }
// • function(a, b) {
// // With hash and stringify coming from fast-check
// const cmp = (hA, hB) => hA - hB;
// const hA = hash('-741474720' + stringify(a)) % 555135046;
// const hB = hash('-741474720' + stringify(b)) % 555135046;
// return cmp(hA, hB);
// }
// • …
Resources: API reference.
Available since 1.6.0.
func
Generate a function producing values using an underlying arbitrary.
Signatures:
fc.func(arb)
with:
arb— arbitrary responsible to produce the values
Usages:
fc.func(fc.nat());
// Examples of generated values:
// • function(...args) {
// // With hash and stringify coming from fast-check
// const outs = [18];
// return outs[hash('-2147483647' + stringify(args)) % outs.length];
// }
// • function(...args) {
// // With hash and stringify coming from fast-check
// const outs = [1044253015,881466391,1911917064,3,2147483643,11,1097098198];
// return outs[hash('-2147483643' + stringify(args)) % outs.length];
// }
// • function(...args) {
// // With hash and stringify coming from fast-check
// const outs = [1644861079,2004697269];
// return outs[hash('-31' + stringify(args)) % outs.length];
// }
// • function(...args) {
// // With hash and stringify coming from fast-check
// const outs = [1192604909,672581076,1502245668,31791972,1761768821,396996837,676877520,1919262427,641285424];
// return outs[hash('-493007294' + stringify(args)) % outs.length];
// }
// • function(...args) {
// // With hash and stringify coming from fast-check
// const outs = [624842423,32338439,1321248893,980127887,850807339,1583851385,1093421004,1758229721,464930963];
// return outs[hash('-2147483642' + stringify(args)) % outs.length];
// }
// • …
Resources: API reference.
Available since 1.6.0.