@stryker-mutator/karma-runner/dist/src/karma-plugins/stryker-reporter.js

A plugin to use the karma test runner in Stryker, the JavaScript mutation testing framework

import { determineHitLimitReached, DryRunStatus, TestStatus } from '@stryker-mutator/api/test-runner';
import { Task } from '@stryker-mutator/util';
export function strykerReporterFactory(karmaServer, config) {
    StrykerReporter.instance.karmaServer = karmaServer;
    StrykerReporter.instance.karmaConfig = config;
    return StrykerReporter.instance;
}
strykerReporterFactory.$inject = ['server', 'config'];
/**
 * This is a singleton implementation of a KarmaReporter.
 * It is loaded by karma and functions as a bridge between the karma world and the stryker world
 *
 * It uses properties as functions because karma is not able to find actual methods.
 *
 * i.e. use `public readonly onFoo = () => {}` instead of `onFoo() { }`.
 */
export class StrykerReporter {
    adapters = [];
    karmaServer;
    karmaConfig;
    runResultHandler;
    testResults = [];
    errorMessage;
    mutantCoverage;
    hitCount;
    hitLimit;
    initTask;
    runTask;
    karmaRunResult;
    browserIsRestarting = false;
    static _instance = new StrykerReporter();
    static get instance() {
        return this._instance;
    }
    onBrowsersReady = () => {
        this.initTask?.resolve();
        this.runTask?.resolve(this.collectRunResult());
    };
    configureHitLimit(hitLimit) {
        this.hitLimit = hitLimit;
        this.hitCount = undefined;
    }
    whenBrowsersReady() {
        this.initTask = new Task();
        return this.initTask.promise.finally(() => {
            this.initTask = undefined;
        });
    }
    whenRunCompletes() {
        this.runTask = new Task();
        return this.runTask.promise.finally(() => {
            this.runTask = undefined;
        });
    }
    onSpecComplete = (_browser, spec) => {
        const name = spec.suite.reduce((specName, suite) => specName + suite + ' ', '') + spec.description;
        const id = spec.id || name;
        if (spec.skipped) {
            this.testResults.push({
                id,
                name,
                timeSpentMs: spec.time,
                status: TestStatus.Skipped,
            });
        }
        else if (spec.success) {
            this.testResults.push({
                id,
                name,
                timeSpentMs: spec.time,
                status: TestStatus.Success,
            });
        }
        else {
            this.testResults.push({
                id,
                name,
                timeSpentMs: spec.time,
                status: TestStatus.Failed,
                failureMessage: spec.log.join(', '),
            });
        }
    };
    onRunStart = () => {
        this.testResults = [];
        this.errorMessage = undefined;
        this.mutantCoverage = undefined;
        this.karmaRunResult = undefined;
        this.browserIsRestarting = false;
    };
    onRunComplete = (_browsers, runResult) => {
        this.karmaRunResult = runResult;
        if (!this.browserIsRestarting) {
            this.runTask.resolve(this.collectRunResult());
        }
    };
    onBrowserComplete = (_browser, result) => {
        this.mutantCoverage = result.mutantCoverage;
        this.hitCount = result.hitCount;
    };
    onBrowserError = (browser, error) => {
        if (this.initTask) {
            this.initTask.reject(error);
        }
        else {
            if (browser.state.toUpperCase().includes('DISCONNECTED')) {
                // Restart the browser for next run
                this.karmaServer.get('launcher').restart(browser.id);
                this.browserIsRestarting = true;
            }
            // Karma 2.0 has different error messages
            if (error.message) {
                this.errorMessage = error.message;
            }
            else {
                this.errorMessage = error.toString();
            }
        }
    };
    collectRunResult() {
        const timeoutResult = determineHitLimitReached(this.hitCount, this.hitLimit);
        if (timeoutResult) {
            return timeoutResult;
        }
        if (this.karmaRunResult?.disconnected) {
            return { status: DryRunStatus.Timeout, reason: `Browser disconnected during test execution. Karma error: ${this.errorMessage}` };
        }
        else if (this.karmaRunResult?.error) {
            return { status: DryRunStatus.Error, errorMessage: this.errorMessage ?? 'A runtime error occurred' };
        }
        else {
            return { status: DryRunStatus.Complete, tests: this.testResults, mutantCoverage: this.mutantCoverage };
        }
    }
}
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