@rbxts/jest-extended

@rbxts/jest-extended

Additional Jest matchers for roblox-ts. Port of jest-extended.

Installation

pnpm add @rbxts/jest-extended

Setup

import * as matchers from "@rbxts/jest-extended";

expect.extend(matchers);

Or add individual matchers:

import { toBeFalse, toBeTrue } from "@rbxts/jest-extended";

expect.extend({ toBeFalse, toBeTrue });

Type declarations are included automatically via types.d.ts.

Matchers

Boolean

• .toBeTrue()
• .toBeFalse()
• .toBeBoolean()

Number

• .toBeNumber()
• .toBeInteger()
• .toBeEven()
• .toBeOdd()
• .toBePositive()
• .toBeNegative()
• .toBeFinite()
• .toBeWithin(start, end)
• .toBeBetween(startDate, endDate)
• .toBeInRange(min, max)

String

• .toBeString()
• .toBeSymbol()
• .toBeHexadecimal()
• .toStartWith(prefix)
• .toEndWith(suffix)
• .toInclude(substring)
• .toIncludeMultiple(substrings)
• .toIncludeRepeated(substring, times)
• .toEqualCaseInsensitive(value)
• .toEqualIgnoringWhitespace(value)

Array

• .toBeArray()
• .toBeArrayOfSize(size)
• .toBeEmpty()
• .toIncludeAllMembers(members)
• .toIncludeAnyMembers(members)
• .toIncludeSameMembers(members)
• .toIncludeAllPartialMembers(members)
• .toIncludeSamePartialMembers(members)
• .toPartiallyContain(member)
• .toSatisfy(predicate)
• .toSatisfyAll(predicate)
• .toSatisfyAny(predicate)

Object

• .toBeObject()
• .toBeEmptyObject()
• .toBeFrozen()
• .toContainKey(key)
• .toContainKeys(keys)
• .toContainAllKeys(keys)
• .toContainAnyKeys(keys)
• .toContainValue(value)
• .toContainValues(values)
• .toContainAllValues(values)
• .toContainAnyValues(values)
• .toContainEntry(entry)
• .toContainEntries(entries)
• .toContainAllEntries(entries)
• .toContainAnyEntries(entries)

Function

• .toBeFunction()
• .toThrowWithMessage(type, message)

Mock

• .toHaveBeenCalledOnce()
• .toHaveBeenCalledExactlyOnceWith(...args)
• .toHaveBeenCalledBefore(mock)
• .toHaveBeenCalledAfter(mock)

Date (DateTime)

• .toBeDate()
• .toBeValidDate()
• .toBeAfter(date)
• .toBeBefore(date)
• .toBeAfterOrEqualTo(date)
• .toBeBeforeOrEqualTo(date)

Mutator

• .toChange(checker)
• .toChangeBy(checker, by)
• .toChangeTo(checker, to)

Other

• .toBeOneOf(members)
• .pass(message?)
• .fail(message?)

Not yet ported

Matcher	Status
toResolve	Async matchers not yet supported
toReject	Async matchers not yet supported

Unsupported matchers

These upstream matchers have no Luau equivalent and are not included:

Matcher	Reason
toBeBigInt	No BigInt in Luau
toBeSealed	No Object.isSealed
toBeExtensible	No Object.isExtensible
toBeNil	Already in base jest
toBeNaN	Already in base jest
toBeDateString	No string-to-date parsing

LICENSE

MIT