@stryker-mutator/karma-runner/dist/src/starters/angular-starter.js

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

import decamelize from 'decamelize';
import semver from 'semver';
import { commonTokens, tokens } from '@stryker-mutator/api/plugin';
import { strykerKarmaConfigPath } from '../karma-plugins/index.js';
import { pluginTokens } from '../plugin-tokens.js';
const MIN_ANGULAR_CLI_VERSION = '6.1.0';
export class AngularProjectStarter {
    logger;
    options;
    requireFromCwd;
    static inject = tokens(commonTokens.logger, commonTokens.options, pluginTokens.requireResolve);
    constructor(logger, options, requireFromCwd) {
        this.logger = logger;
        this.options = options;
        this.requireFromCwd = requireFromCwd;
    }
    // eslint-disable-next-line @typescript-eslint/require-await -- Any thrown errors need to be translated to rejections
    async start() {
        this.verifyAngularCliVersion();
        const { ngConfig } = this.options.karma;
        // Make sure require angular cli from inside this function, that way it won't break if angular isn't installed and this file is required.
        let cli = this.requireFromCwd('@angular/cli');
        if ('default' in cli) {
            cli = cli.default;
        }
        const cliArgs = ['test', '--progress=false', `--karma-config=${strykerKarmaConfigPath}`];
        if (ngConfig?.testArguments) {
            const testArguments = ngConfig.testArguments;
            const ngTestArguments = Object.keys(testArguments);
            verifyNgTestArguments(ngTestArguments);
            ngTestArguments.forEach((key) => {
                const decamelizedKey = decamelize(key, { separator: '-' });
                if ('progress' !== key && 'karma-config' !== decamelizedKey) {
                    cliArgs.push(`--${decamelizedKey}=${testArguments[key]}`);
                }
            });
        }
        const actualCommand = `ng ${cliArgs.join(' ')}`;
        this.logger.debug(`Starting Angular tests: ${actualCommand}`);
        return {
            exitPromise: cli({ cliArgs }),
        };
    }
    verifyAngularCliVersion() {
        const pkg = this.requireFromCwd('@angular/cli/package');
        const version = semver.coerce(pkg.version);
        if (!version || semver.lt(version, MIN_ANGULAR_CLI_VERSION)) {
            throw new Error(`Your @angular/cli version (${pkg.version}) is not supported. Please install ${MIN_ANGULAR_CLI_VERSION} or higher`);
        }
    }
}
function verifyNgTestArguments(ngTestArguments) {
    const prefixedArguments = ngTestArguments.filter((key) => key.trim().startsWith('-'));
    if (prefixedArguments.length > 0) {
        throw new Error(`Don't prefix arguments with dashes ('-'). Stryker will do this automatically. Problematic arguments are ${prefixedArguments.join(', ')}.`);
    }
}
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