@stryker-mutator/core/dist/test/integration/checker/additional-checkers.js

The extendable JavaScript mutation testing framework

import os from 'os';
import fs from 'fs';
import { CheckStatus } from '@stryker-mutator/api/check';
import { declareClassPlugin, PluginKind } from '@stryker-mutator/api/plugin';
import { factory } from '@stryker-mutator/test-helpers';
class HealthyChecker {
    async init() {
        // Init
    }
    async check([mutant]) {
        return { [mutant.id]: mutant.id === '1' ? { status: CheckStatus.Passed } : { status: CheckStatus.CompileError, reason: 'Id is not 1 🤷‍♂️' } };
    }
}
class CrashingChecker {
    async init() {
        // Init
    }
    async check(_) {
        throw new Error('Always crashing');
    }
}
export class TwoTimesTheCharm {
    async init() {
        // Init
    }
    async check(mutants) {
        let count = +(await fs.promises.readFile(TwoTimesTheCharm.COUNTER_FILE, 'utf-8'));
        count++;
        await fs.promises.writeFile(TwoTimesTheCharm.COUNTER_FILE, count.toString(), 'utf-8');
        if (count >= 2) {
            return { [mutants[0].id]: { status: CheckStatus.Passed } };
        }
        else {
            process.exit(count);
        }
    }
}
TwoTimesTheCharm.COUNTER_FILE = `${os.tmpdir()}/stryker-js-two-times-the-charm-checker-file`;
export class VerifyTitle {
    async init() {
        // Init
    }
    async check([mutant]) {
        if (mutant.fileName === process.title) {
            return { [mutant.id]: factory.checkResult({ status: CheckStatus.Passed }) };
        }
        else {
            return { [mutant.id]: factory.checkResult({ status: CheckStatus.CompileError }) };
        }
    }
}
export const strykerPlugins = [
    declareClassPlugin(PluginKind.Checker, 'healthy', HealthyChecker),
    declareClassPlugin(PluginKind.Checker, 'crashing', CrashingChecker),
    declareClassPlugin(PluginKind.Checker, 'two-times-the-charm', TwoTimesTheCharm),
    declareClassPlugin(PluginKind.Checker, 'verify-title', VerifyTitle),
];
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