mathieueveillard

/*
 * This code snippet is an extract of a private codebase. Though it relies on many dependencies to
 * the rest of the codebase, I believe that the code carries enough intension so that one can get
 * the overall idea (see: https://blog.mathieueveillard.com/monkey-testing-et-property-based-testing-une-exploration)
 */

import fc from "fast-check";

const ALL_REDUCERS: HasName<Reducer<ApplicationState>>[] = [
  withName("selectPhotograph")(pickRandomIndex(getNumberOfPhotographs)(selectionReducers.selectPhotograph)),

mathieueveillard

export const createMock = <T>(values: T[] = []) => {
  function* generator(): Generator<T, T | undefined, T> {
    for (let i = 0; i < values.length; i++) {
      yield values[i];
    }
    return undefined;
  }

  const generatorInstance = generator();

mathieueveillard

const IdentityFunctor = <S>(value: S) => {
  return {
    map: <U>(fn: (s: S) => U) => IdentityFunctor(fn(value)),
    valueOf: () => value,
  };
};

const appendIfMultipleOf = (stringToAppend: string) => (m: number) => (n: number) => (s: string): string => {
  if (n % m === 0) {
    return (s += stringToAppend);

mathieueveillard

const isMultipleOf = (m: number) => (n: number): boolean => n % m === 0;

export function internal(n: number): string {
  let result = "";

  if (isMultipleOf(3)(n)) {
    result += "Fizz";
  }

  if (isMultipleOf(5)(n)) {

mathieueveillard

Write a program that prints the numbers from 1 to 100. But for multiples of three print “Fizz” instead of the number and for the multiples of five print “Buzz”. For numbers which are multiples of both three and five print “FizzBuzz”.