ts-jest
Version:
A Jest transformer with source map support that lets you use Jest to test projects written in TypeScript
53 lines (52 loc) • 2.74 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.pathsToModuleNameMapper = void 0;
const bs_logger_1 = require("bs-logger");
const utils_1 = require("../utils");
const messages_1 = require("../utils/messages");
// we don't need to escape all chars, so commented out is the real one
// const escapeRegex = (str: string) => str.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&')
const escapeRegex = (str) => str.replace(/[-\\^$*+?.()|[\]{}]/g, '\\$&');
const logger = utils_1.rootLogger.child({ [bs_logger_1.LogContexts.namespace]: 'path-mapper' });
const pathsToModuleNameMapper = (mapping, { prefix = '', useESM = false } = {}) => {
const jestMap = {};
for (const fromPath of Object.keys(mapping)) {
const toPaths = mapping[fromPath];
// check that we have only one target path
if (toPaths.length === 0) {
logger.warn((0, messages_1.interpolate)("Not mapping \"{{path}}\" because it has no target." /* Errors.NotMappingPathWithEmptyMap */, { path: fromPath }));
continue;
}
// split with '*'
const segments = fromPath.split(/\*/g);
if (segments.length === 1) {
const paths = toPaths.map((target) => {
const enrichedPrefix = prefix !== '' && !prefix.endsWith('/') ? `${prefix}/` : prefix;
return `${enrichedPrefix}${target}`;
});
const cjsPattern = `^${escapeRegex(fromPath)}$`;
jestMap[cjsPattern] = paths.length === 1 ? paths[0] : paths;
}
else if (segments.length === 2) {
const paths = toPaths.map((target) => {
const enrichedTarget = target.startsWith('./') && prefix !== '' ? target.substring(target.indexOf('/') + 1) : target;
const enrichedPrefix = prefix !== '' && !prefix.endsWith('/') ? `${prefix}/` : prefix;
return `${enrichedPrefix}${enrichedTarget.replace(/\*/g, '$1')}`;
});
if (useESM) {
const esmPattern = `^${escapeRegex(segments[0])}(.*)${escapeRegex(segments[1])}\\.js$`;
jestMap[esmPattern] = paths.length === 1 ? paths[0] : paths;
}
const cjsPattern = `^${escapeRegex(segments[0])}(.*)${escapeRegex(segments[1])}$`;
jestMap[cjsPattern] = paths.length === 1 ? paths[0] : paths;
}
else {
logger.warn((0, messages_1.interpolate)("Not mapping \"{{path}}\" because it has more than one star (`*`)." /* Errors.NotMappingMultiStarPath */, { path: fromPath }));
}
}
if (useESM) {
jestMap['^(\\.{1,2}/.*)\\.js$'] = '$1';
}
return jestMap;
};
exports.pathsToModuleNameMapper = pathsToModuleNameMapper;