@fgv/ts-utils-jest/dist/matchers/toFail/index.js

Custom matchers for ts-utils result class

import { printExpectedResult, printReceivedResult } from '../../utils/matcherHelpers';
import { matcherName, predicate } from './predicate';
import { matcherHint } from 'jest-matcher-utils';
function passMessage(received) {
    return () => [
        matcherHint(`.not.${matcherName}`),
        printExpectedResult('failure', false),
        printReceivedResult(received)
    ].join('\n');
}
function failMessage(received) {
    return () => [matcherHint(`${matcherName}`), printExpectedResult('failure', true), printReceivedResult(received)].join('\n');
}
export default {
    toFail: function (received) {
        const pass = predicate(received);
        if (pass) {
            return { pass: true, message: passMessage(received) };
        }
        return { pass: false, message: failMessage(received) };
    }
};
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