Discover AI-native insights at Testμ Conference‘25

How to use additionalCheck method in fast-check-monorepo

Best JavaScript code snippet using fast-check-monorepo

rules.test.ts

1import Big from "big.js";2import moment from "moment";3import { Rules } from "./rules";4import { RawRecord } from "./transaction";5test("Transforms a RuleDesc such that additionalCondition can be eval'd", () => {6  const ruleDesc: Rules.RuleDesc = {7    regex: ".*",8    category: "coffee/hip",9    additionalCheck: "isDebit({ min: 4.0 })",10  };11  const rule = Rules.toRule(ruleDesc);12  expect(rule.additionalCheck).toBeInstanceOf(Function);13  expect(rule.additionalCheck!(withAmount(-3))).toEqual(false);14  expect(rule.additionalCheck!(withAmount(-5))).toEqual(true);15});16test("or() can be used in rule additionalChecks (not `||`)", () => {17  const ruleDesc: Rules.RuleDesc = {18    regex: ".*",19    category: "what",20    additionalCheck: "isDebit({ eq: 4.0 }).or(isCredit({ eq: 4.0 }))",21  };22  const rule = Rules.toRule(ruleDesc);23  expect(rule.additionalCheck).toBeInstanceOf(Function);24  expect(rule.additionalCheck!(withAmount(-4))).toEqual(true);25  expect(rule.additionalCheck!(withAmount(+4))).toEqual(true);26  expect(rule.additionalCheck!(withAmount(+5))).toEqual(false);27  expect(rule.additionalCheck!(withAmount(-5))).toEqual(false);28});29test("regexp with no slash is used with no flags", () => {30  const rule = Rules.toRule(withRegexpString("^foo"));31  expect(rule.regex.test("foo bar")).toEqual(true);32  expect(rule.regex.test("bar foo")).toEqual(false);33  expect(rule.regex.test("Foo bar")).toEqual(false);34});35test("regexp slashes and no flags is fine", () => {36  const rule = Rules.toRule(withRegexpString("/^foo/"));37  expect(rule.regex.test("foo bar")).toEqual(true);38  expect(rule.regex.test("bar foo")).toEqual(false);39  expect(rule.regex.test("Foo bar")).toEqual(false);40});41test("regexp slashes and flags is taking flags into account", () => {42  const rule = Rules.toRule(withRegexpString("/^foo/i"));43  expect(rule.regex.test("foo bar")).toEqual(true);44  expect(rule.regex.test("bar foo")).toEqual(false);45  expect(rule.regex.test("Foo bar")).toEqual(true);46  expect(rule.regex.test("fOO Bar")).toEqual(true);47});48test("regexp slashes needs at least both slashes or throws exception", () => {49  expect(() => Rules.toRule(withRegexpString("/^foo"))).toThrow(50    "Invalid regular expression"51  );52});53// Not actually super keen to make this work54test.skip("regex only last slash throws exception", () => {55  expect(() => Rules.toRule(withRegexpString("^foo/"))).toThrow(56    "Invalid regular expression"57  );58  expect(() => Rules.toRule(withRegexpString("^foo/i"))).toThrow(59    "Invalid regular expression"60  );61});62test("regexp slashes and invalid flag throws exception", () => {63  expect(() => Rules.toRule(withRegexpString("/^foo/z"))).toThrow(64    /invalid flags/i65  );66});67const withRegexpString = (r: string): Rules.RuleDesc => ({68  regex: r,69  category: "lol",70});71const withAmount = (n: number): RawRecord => {72  return {73    id: "ignore me",74    account: { id: "1", name: "test account" },75    date: moment(),76    desc: "test record",77    amount: new Big(n),78  };...

rules.ts

Source: rules.ts

1import * as yaml from "js-yaml";2import { evalAsFunction } from "../util/eval";3import { Logger } from "../util/log";4import { Category } from "./category";5import { RawRecord } from "./transaction";6export namespace Rules {7  type AdditionalCheck = (transaction: RawRecord) => boolean;8  type AdditionalCheckTS = string;9  /* The rule, pretty much as described in the yaml file -- could even have comments, line numbers, the lot */10  export interface RuleDesc {11    readonly merchant?: string;12    readonly category: string;13    readonly regex: string;14    readonly additionalCheck?: AdditionalCheckTS;15  }16  /* The rule, as used at runtime */17  export interface Rule {18    readonly merchant?: string;19    readonly category: Category;20    readonly regex: RegExp;21    readonly additionalCheck?: AdditionalCheck;22  }23  export const extractCategories = (rules: RuleDesc[]) => {24    const allCats = rules.map((r) => r.category);25    // remove dupes26    return Array.from(new Set(allCats)).sort();27  };28  // For transactions and dateRange, we're doing conversions in worker/transfer,29  // to workaround the types of Big.js and moment.js that aren't "transferrable" between webworkers.30  // Here, we want to eval/type a Function from a string, which is incompatible but we also don't want31  // to eval it every time we send work to worker?32  export const toRule: (r: RuleDesc) => Rule = (r: RuleDesc) => {33    return {34      regex: parseRegex(r.regex),35      category: r.category,36      merchant: r.merchant,37      additionalCheck: r.additionalCheck38        ? evalRule(r.additionalCheck)39        : undefined,40    };41  };42  function parseRegex(regexStr: string): RegExp {43    if (regexStr[0] === "/") {44      const lastIndexOf = regexStr.lastIndexOf("/");45      if (lastIndexOf < 1) {46        throw new Error("Invalid regular expression");47      }48      const exp = regexStr.slice(1, lastIndexOf);49      const flags = regexStr.slice(lastIndexOf + 1);50      return new RegExp(exp, flags);51    } else {52      return new RegExp(regexStr);53    }54  }55  function evalRule(additionalCheck: AdditionalCheckTS): AdditionalCheck {56    return evalAsFunction<RawRecord, boolean>(additionalCheck);57  }58  export class RulesLoader {59    constructor(readonly log: Logger) {60      this.log = log;61    }62    loadYaml(yamlContent: string): RuleDesc[] {63      const doc = yaml.load(yamlContent);64      if (!Array.isArray(doc)) {65        throw new Error("Rules yaml should be an array");66      } else {67        return Array.from(doc).map((yamlElement) => {68          return {69            merchant: yamlElement["merchant"],70            category: yamlElement["category"],71            regex: yamlElement["regex"],72            additionalCheck: yamlElement["additionalCheck"],73          };74        });75      }76    }77  }...

filters.ts

Source: filters.ts

...21      getValue(u.value) > 0 || getValue(u.value) === -100;22  }23  return (item: AnnoItem) =>24    filterValue === "all" ||25    item.upgrades.some((u) => u.key === filterValue && additionalCheck(u));26}27export function byRarity(filterValue: string) {28  return (item: AnnoItem) =>29    filterValue === "all" || item.rarityLabel === filterValue;30}31export function byFavourite(filterValue: boolean) {32  return (item: AnnoItem) => filterValue === false || item.favourite;33}34function getValue(value: number | { Value: number }) {35  return typeof value === "number" ? value : value.Value;...

Using AI Code Generation

1const additionalCheck = require("fast-check-monorepo").additionalCheck;2const fc = require("fast-check");3const isEven = (n) => n % 2 === 0;4const isOdd = (n) => n % 2 !== 0;5describe("additionalCheck", () => {6  test("isEven", () =>7    additionalCheck(8      fc.integer(),9      (n) => isEven(n) || isOdd(n),10    ));11});12-   [additionalCheck](#additionalcheck)13    -   [Parameters](#parameters)14    -   [Examples](#examples)15-   [additionalCheckAsync](#additionalcheckasync)16    -   [Parameters](#parameters-1)17    -   [Examples](#examples-1)18-   [additionalCheckProperty](#additionalcheckproperty)19    -   [Parameters](#parameters-2)20    -   [Examples](#examples-2)21-   [additionalCheckPropertyAsync](#additionalcheckpropertyasync)22    -   [Parameters](#parameters-3)23    -   [Examples](#examples-3)24-   [additionalCheckPropertyWithConfig](#additionalcheckpropertywithconfig)25    -   [Parameters](#parameters-4)26    -   [Examples](#examples-4)27-   [additionalCheckPropertyWithConfigAsync](#additionalcheckpropertywithconfigasync)28    -   [Parameters](#parameters-5)29    -   [Examples](#examples-5)30-   [additionalCheckPropertyWithConfigAndSeed](#additionalcheckpropertywithconfigandseed)31    -   [Parameters](#parameters-6)32    -   [Examples](#examples-6)33-   [additionalCheckPropertyWithConfigAndSeedAsync](#additionalcheckpropertywithconfigandseedasync)34    -   [Parameters](#parameters-7)35    -   [Examples](#examples-7)36-   [additionalCheckPropertyWithSeed](#additionalcheckpropertywithseed)37    -   [Parameters](#parameters-8)38    -   [Examples](#examples-8)39-   [additionalCheckPropertyWithSeedAsync](#additionalcheckpropertywithseedasync)40    -   [Parameters](#parameters-9)

Using AI Code Generation

1const fc = require('fast-check');2const additionalCheck = require('fast-check-monorepo/additionalCheck');3fc.assert(4  fc.property(fc.integer(), fc.integer(), (a, b) => {5    return a + b >= a && a + b >= b;6  })7);

Using AI Code Generation

1const fc = require("fast-check");2fc.assert(3  fc.property(fc.integer(), fc.integer(), (a, b) => {4    return additionalCheck(a, b);5  })6);7  ✓ should hold (4ms)

Using AI Code Generation

1const additionalCheck = require('fast-check-monorepo/additionalCheck');2const additionalCheck = require('fast-check-monorepo');3const additionalCheck = require('fast-check-monorepo');4const additionalCheck = require('fast-check-monorepo');5const additionalCheck = require('fast-check-monorepo');6const additionalCheck = require('fast-check-monorepo');7const additionalCheck = require('fast-check-monorepo');

Blogs

Check out the latest blogs from LambdaTest on this topic:

Feeding your QA Career – Developing Instinctive & Practical Skills

The QA testing profession requires both educational and long-term or experience-based learning. One can learn the basics from certification courses and exams, boot camp courses, and college-level courses where available. However, developing instinctive and practical skills works best when built with work experience.

Test Optimization for Continuous Integration

“Test frequently and early.” If you’ve been following my testing agenda, you’re probably sick of hearing me repeat that. However, it is making sense that if your tests detect an issue soon after it occurs, it will be easier to resolve. This is one of the guiding concepts that makes continuous integration such an effective method. I’ve encountered several teams who have a lot of automated tests but don’t use them as part of a continuous integration approach. There are frequently various reasons why the team believes these tests cannot be used with continuous integration. Perhaps the tests take too long to run, or they are not dependable enough to provide correct results on their own, necessitating human interpretation.

Testing in Production: A Detailed Guide

When most firms employed a waterfall development model, it was widely joked about in the industry that Google kept its products in beta forever. Google has been a pioneer in making the case for in-production testing. Traditionally, before a build could go live, a tester was responsible for testing all scenarios, both defined and extempore, in a testing environment. However, this concept is evolving on multiple fronts today. For example, the tester is no longer testing alone. Developers, designers, build engineers, other stakeholders, and end users, both inside and outside the product team, are testing the product and providing feedback.

Introducing LambdaTest Analytics: Test Reporting Made Awesome ????

Collecting and examining data from multiple sources can be a tedious process. The digital world is constantly evolving. To stay competitive in this fast-paced environment, businesses must frequently test their products and services. While it’s easy to collect raw data from multiple sources, it’s far more complex to interpret it properly.

[LambdaTest Spartans Panel Discussion]: What Changed For Testing & QA Community And What Lies Ahead

The rapid shift in the use of technology has impacted testing and quality assurance significantly, especially around the cloud adoption of agile development methodologies. With this, the increasing importance of quality and automation testing has risen enough to deliver quality work.

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.