expect-more
Advanced tools
Package description
The expect-more npm package provides a set of additional matchers for Jest and Jasmine, allowing for more expressive and readable tests. It extends the default set of matchers with a variety of new ones that cover a wide range of use cases.
String Matchers
This matcher checks if the given string is non-empty. It helps in validating that a string has content.
expect('Hello, World!').toBeNonEmptyString();Number Matchers
This matcher checks if the given number is even. It is useful for validating numerical properties.
expect(42).toBeEvenNumber();Array Matchers
This matcher checks if the given array contains only numbers. It helps in ensuring the type consistency of array elements.
expect([1, 2, 3]).toBeArrayOfNumbers();Object Matchers
This matcher checks if the given object has a specific key. It is useful for validating the structure of objects.
expect({ name: 'John' }).toHaveKey('name');Date Matchers
This matcher checks if the given date is after a specified date. It helps in validating date-related conditions.
expect(new Date()).toBeAfter(new Date('2000-01-01'));jest-extended provides a large number of additional matchers for Jest, similar to expect-more. It includes matchers for arrays, objects, strings, numbers, and more, making it a comprehensive extension for Jest testing.
Chai is an assertion library for Node.js and the browser that can be paired with any testing framework. It provides a variety of matchers and allows for expressive and readable tests, similar to expect-more.
jasmine-expect extends Jasmine with additional matchers, similar to expect-more. It includes matchers for various data types and conditions, enhancing the expressiveness of Jasmine tests.
Readme
Curried JavaScript Type Testing Library with Zero Dependencies
npm install expect-more --save-dev
import { endsWith, isWithinRange } from 'expect-more';
const result: boolean = endsWith('Script', 'JavaScript');
// => true
const endsWithScript = endsWith('Script');
endsWithScript('JavaScript');
// => true
isWithinRange(10, 20, 21);
// => false
[0, 1, 1, 2, 3, 5, 8, 13, 21, 34].filter(isWithinRange(5, 15));
// => [5, 8, 13]
expect-moredeclare const isBoolean: (value: unknown) => value is boolean;
declare const isFalse: (value: unknown) => value is false;
declare const isNull: (value: unknown) => value is null;
declare const isRegExp: (value: unknown) => value is RegExp;
declare const isTrue: (value: unknown) => value is true;
declare const isUndefined: (value: unknown) => value is undefined;
declare const isAsyncFunction: <T = (...args: any[]) => Promise<any>>(
value: unknown,
) => value is T;
declare const isFunction: <T = (...args: any[]) => any>(value: unknown) => value is T;
declare const isGeneratorFunction: <T = Generator>(value: unknown) => value is T;
declare const throwsAnyError: <T = (...args: any[]) => any>(value: unknown) => value is T;
declare const throwsErrorOfType: <T = (...args: any[]) => any>(
typeName: string,
value: unknown,
) => value is T;
declare const hasMember: <T = any>(memberName: string, value: unknown) => value is T;
declare const isEmptyObject: <T = any>(value: unknown) => value is T;
declare const isNil: (value: unknown) => value is undefined | null;
declare const isNonEmptyObject: <T = any>(value: unknown) => value is T;
declare const isObject: <T = any>(value: unknown) => value is T;
declare const isWalkable: <T = any>(value: unknown) => value is T;
declare const isArray: <T extends any[] = any[]>(value: unknown) => value is T;
declare const isArrayIncludingAllOf: <T extends any[] = any[]>(needed: any[], value: unknown) => value is T;
declare const isArrayIncludingAnyOf: <T extends any[] = any[]>(needed: any[], value: unknown) => value is T;
declare const isArrayIncludingOnly: <T extends any[] = any[]>(needed: any[], value: unknown) => value is T;
declare const isArrayOfBooleans: (value: unknown) => value is boolean[];
declare const isArrayOfNumbers: (value: unknown) => value is number[];
declare const isArrayOfObjects: <T extends any[] = any[]>(value: unknown) => value is T;
declare const isArrayOfSize: <T extends any[] = any[]>(
size: number,
value: unknown,
) => value is T;
declare const isArrayOfStrings: (value: unknown) => value is string[];
declare const isEmptyArray: <T extends [] = []>(any) => value is T;
declare const isNonEmptyArray: <T extends any[] = any[]>(value: unknown) => value is T;
declare const isAfter: (other: Date, value: unknown) => value is Date;
declare const isBefore: (other: Date, value: unknown) => value is Date;
declare const isDate: (value: unknown) => value is Date;
declare const isDateBetween: (floor: Date, ceiling: Date, value: unknown) => value is Date;
declare const isDateInMonth: (index: number, value: unknown) => value is Date;
declare const isDateInYear: (year: number, value: unknown) => value is Date;
declare const isDateOnDayOfMonth: (day: number, value: unknown) => value is Date;
declare const isDateOnDayOfWeek: (index: number, value: unknown) => value is Date;
declare const isDateOnOrAfter: (other: Date, value: unknown) => value is Date;
declare const isDateOnOrBefore: (other: Date, value: unknown) => value is Date;
declare const isValidDate: (value: unknown) => value is Date;
declare const isCalculable: (value: unknown) => value is number;
declare const isDecimalNumber: (value: unknown) => value is number;
declare const isDivisibleBy: (other: number, value: unknown) => value is number;
declare const isEvenNumber: (value: unknown) => value is number;
declare const isGreaterThanOrEqualTo: (other: number, value: unknown) => value is number;
declare const isLessThanOrEqualTo: (other: number, value: unknown) => value is number;
declare const isNear: (other: number, epsilon: number, value: unknown) => value is number;
declare const isNegativeNumber: (value: unknown) => value is number;
declare const isNumber: (value: unknown) => value is number;
declare const isOddNumber: (value: unknown) => value is number;
declare const isPositiveNumber: (value: unknown) => value is number;
declare const isWholeNumber: (value: unknown) => value is number;
declare const isWithinRange: (
floor: number,
ceiling: number,
value: unknown,
) => value is number;
declare const endsWith: (other: string, value: unknown) => value is string;
declare const isEmptyString: (value: unknown) => value is string;
declare const isIso8601: (value: unknown) => value is string;
declare const isJsonString: (value: unknown) => value is string;
declare const isLongerThan: (other: string, value: unknown) => value is string;
declare const isNonEmptyString: (value: unknown) => value is string;
declare const isSameLengthAs: (other: string, value: unknown) => value is string;
declare const isShorterThan: (other: string, value: unknown) => value is string;
declare const isString: (value: unknown) => value is string;
declare const isVisibleString: (value: unknown) => value is string;
declare const isWhitespace: (value: unknown) => value is string;
declare const startsWith: (other: string, value: unknown) => value is string;
expect-more/gendeclare const withMissingBranches: (value: object | any[]) => Generator;
declare const withMissingLeaves: (value: object | any[]) => Generator;
declare const withMissingNodes: (value: object | any[]) => Generator;
declare const withNullBranches: (value: object | any[]) => Generator;
declare const withNullLeaves: (value: object | any[]) => Generator;
declare const withNullNodes: (value: object | any[]) => Generator;
FAQs
Curried JavaScript Type Testing Library with Zero Dependencies
The npm package expect-more receives a total of 84,121 weekly downloads. As such, expect-more popularity was classified as popular.
We found that expect-more demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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