ts-jest
Version:
A Jest transformer with source map support that lets you use Jest to test projects written in TypeScript
147 lines (146 loc) • 5.82 kB
JavaScript
;
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
return c > 3 && r && Object.defineProperty(target, key, r), r;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.importer = exports.Importer = void 0;
exports.__requireModule = __requireModule;
const logger_1 = require("./logger");
const memoize_1 = require("./memoize");
const messages_1 = require("./messages");
const logger = logger_1.rootLogger.child({ namespace: 'Importer' });
/**
* @internal
*/
class Importer {
static get instance() {
logger.debug('creating Importer singleton');
return new Importer();
}
babelJest(why) {
return this._import(why, 'babel-jest');
}
babelCore(why) {
return this._import(why, '@babel/core');
}
typescript(why, which) {
return this._import(why, which);
}
esBuild(why) {
return this._import(why, 'esbuild');
}
tryThese(moduleName, ...fallbacks) {
let name;
let loaded;
const tries = [moduleName, ...fallbacks];
while ((name = tries.shift()) !== undefined) {
const req = requireWrapper(name);
// remove exports from what we're going to log
// eslint-disable-next-line @typescript-eslint/no-explicit-any
const contextReq = { ...req };
delete contextReq.exports;
if (req.exists) {
// module exists
loaded = req;
if (req.error) {
logger.error({ requireResult: contextReq }, `failed loading module '${name}'`, req.error.message);
}
else {
logger.debug({ requireResult: contextReq }, 'loaded module', name);
}
break;
}
else {
// module does not exists in the path
logger.debug({ requireResult: contextReq }, `module '${name}' not found`);
}
}
// return the loaded one, could be one that has been loaded, or one which has failed during load
// but not one which does not exists
return loaded;
}
tryTheseOr(moduleNames, missingResult, allowLoadError = false) {
const args = Array.isArray(moduleNames) ? moduleNames : [moduleNames];
const result = this.tryThese(...args);
if (!result)
return missingResult;
if (!result.error)
return result.exports;
if (allowLoadError)
return missingResult;
throw result.error;
}
_import(why, moduleName, { alternatives = [], installTip = moduleName } = {}) {
// try to load any of the alternative after trying main one
const res = this.tryThese(moduleName, ...alternatives);
// if we could load one, return it
if (res?.exists) {
if (!res.error)
return res.exports;
// it could not load because of a failure while importing, but it exists
throw new Error((0, messages_1.interpolate)("Loading module {{module}} failed with error: {{error}}" /* Errors.LoadingModuleFailed */, { module: res.given, error: res.error.message }));
}
// if it couldn't load, build a nice error message so the user can fix it by himself
const msg = alternatives.length ? "Unable to load any of these modules: {{module}}. {{reason}}. To fix it:\n{{fix}}" /* Errors.UnableToLoadAnyModule */ : "Unable to load the module {{module}}. {{reason}} To fix it:\n{{fix}}" /* Errors.UnableToLoadOneModule */;
const loadModule = [moduleName, ...alternatives].map((m) => `"${m}"`).join(', ');
if (typeof installTip === 'string') {
installTip = [{ module: installTip, label: `install "${installTip}"` }];
}
const fix = installTip
.map((tip) => ` ${installTip.length === 1 ? '↳' : '•'} ${(0, messages_1.interpolate)("{{label}}: `npm i -D {{module}}` (or `yarn add --dev {{module}}`)" /* Helps.FixMissingModule */, tip)}`)
.join('\n');
throw new Error((0, messages_1.interpolate)(msg, {
module: loadModule,
reason: why,
fix,
}));
}
}
exports.Importer = Importer;
__decorate([
(0, memoize_1.Memoize)((...args) => args.join(':'))
], Importer.prototype, "tryThese", null);
__decorate([
(0, memoize_1.Memoize)()
], Importer, "instance", null);
/**
* @internal
*/
exports.importer = Importer.instance;
function requireWrapper(moduleName) {
let path;
let exists = false;
try {
path = resolveModule(moduleName);
exists = true;
}
catch (error) {
return { error: error, exists, given: moduleName };
}
const result = { exists, path, given: moduleName };
try {
result.exports = requireModule(path);
}
catch {
try {
result.exports = requireModule(moduleName);
}
catch (error) {
result.error = error;
}
}
return result;
}
let requireModule = (mod) => require(mod);
let resolveModule = (mod) => require.resolve(mod, { paths: [process.cwd(), __dirname] });
/**
* @internal
*/
// so that we can test easier
function __requireModule(localRequire, localResolve) {
requireModule = localRequire;
resolveModule = localResolve;
}