ts-jest-resolver/dist/index.cjs

A resolver for `jest` that uses same strategy as TS when resolving files with JavaScript extension (".js").

/*!
 * ts-jest-resolver v2.0.1
 * (c) Vitor Luiz Cavalcanti
 * Released under the MIT License.
 */

'use strict';

var resolutions = [
    {
        matcher: /\.js$/i,
        extensions: ['.ts', '.tsx'],
    },
    {
        matcher: /\.jsx$/i,
        extensions: ['.ts', '.tsx', '.js'],
    },
    {
        matcher: /\.cjs$/i,
        extensions: ['.cts'],
    },
    {
        matcher: /\.mjs$/i,
        extensions: ['.mts'],
    },
];
/**
 * A resolver for `jest` that uses same strategy as TS when resolving files with
 * JavaScript extension (".js"). Otherwise it just uses default resolver.
 *
 * When receives a path with JavaScript extension (".js" or ".jsx"):
 * 1. It tries to resolve to a path with ".tsx".
 * 2. If no file was found, it tries to resolve to a path with ".ts".
 * 3. If no file was found, it resolves to original path (with ".js" or ".jsx").
 *
 * When receives a path with ES modules extension (".mjs"):
 * 1. It tries to resolve to a path with ".mts".
 * 2. If no file was found, it resolves to original path (with ".mjs").
 *
 * When receives a path with CommonJS modules extension (".cjs"):
 * 1. It tries to resolve to a path with ".cts".
 * 2. If no file was found, it resolves to original path (with ".cjs").
 */
function resolverForTSJest(path, options) {
    var resolver = options.defaultResolver;
    var resolution = resolutions.find(function (_a) {
        var matcher = _a.matcher;
        return matcher.test(path);
    });
    if (resolution) {
        for (var _i = 0, _a = resolution.extensions; _i < _a.length; _i++) {
            var extension = _a[_i];
            try {
                return resolver(path.replace(resolution.matcher, extension), options);
            }
            catch (_b) {
                continue;
            }
        }
    }
    return resolver(path, options);
}

module.exports = resolverForTSJest;
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