48 lines
1.3 KiB
TypeScript
48 lines
1.3 KiB
TypeScript
import { matcherHint, printDiffOrStringify } from 'jest-matcher-utils'
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import { HTMLElement } from 'nodom'
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type MatcherResult = jest.CustomMatcherResult
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declare global {
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// eslint-disable-next-line @typescript-eslint/no-namespace
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namespace jest {
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interface Matchers<R, T> {
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toHtmlEqual (expected: HTMLElement | string | Array<HTMLElement | string>): R,
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}
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}
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}
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function formatArray (items: unknown[]): string {
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return '[\n' + items.map(x => ` ${x}`).join(',\n') + '\n]'
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}
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function stringify (obj: HTMLElement | string): string {
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return typeof obj === 'string' ? obj : obj.outerHTML
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}
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export function toHtmlEqual (
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received: HTMLElement | HTMLElement[],
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expected: HTMLElement | string | Array<HTMLElement | string>,
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): MatcherResult {
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const receivedStr = Array.isArray(received)
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? formatArray(received.map(stringify))
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: stringify(received)
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const expectedStr = Array.isArray(expected)
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? formatArray(expected.map(stringify))
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: stringify(expected)
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const pass = receivedStr === expectedStr
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const hintOpts = {
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isNot: pass,
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comment: 'equality of .outerHTML',
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}
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const message = () =>
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matcherHint('toHtmlEqual', undefined, undefined, hintOpts)
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+ '\n\n'
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+ printDiffOrStringify(expectedStr, receivedStr, 'Expected', 'Received', true)
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return { pass, message }
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}
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