fast-check
Version:
Property based testing framework for JavaScript (like QuickCheck)
65 lines (64 loc) • 1.4 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.nilHelper = nilHelper;
exports.mapHelper = mapHelper;
exports.flatMapHelper = flatMapHelper;
exports.filterHelper = filterHelper;
exports.takeNHelper = takeNHelper;
exports.takeWhileHelper = takeWhileHelper;
exports.joinHelper = joinHelper;
class Nil {
[Symbol.iterator]() {
return this;
}
next(value) {
return { value, done: true };
}
}
Nil.nil = new Nil();
function nilHelper() {
return Nil.nil;
}
function* mapHelper(g, f) {
for (const v of g) {
yield f(v);
}
}
function* flatMapHelper(g, f) {
for (const v of g) {
yield* f(v);
}
}
function* filterHelper(g, f) {
for (const v of g) {
if (f(v)) {
yield v;
}
}
}
function* takeNHelper(g, n) {
for (let i = 0; i < n; ++i) {
const cur = g.next();
if (cur.done) {
break;
}
yield cur.value;
}
}
function* takeWhileHelper(g, f) {
let cur = g.next();
while (!cur.done && f(cur.value)) {
yield cur.value;
cur = g.next();
}
}
function* joinHelper(g, others) {
for (let cur = g.next(); !cur.done; cur = g.next()) {
yield cur.value;
}
for (const s of others) {
for (let cur = s.next(); !cur.done; cur = s.next()) {
yield cur.value;
}
}
}