@jpapini/jest-config/dist/index.mjs

Jest configuration and utilities for JavaScript and TypeScript projects.

// src/create-jest-config.ts
function createBaseJestConfig(options) {
  return {
    ...options,
    rootDir: options.rootDir,
    collectCoverageFrom: [
      "<rootDir>/src/**/*.{js,mjs,cjs,jsx,ts,tsx,mts,cts}",
      ...options.collectCoverageFrom ?? []
    ],
    coverageDirectory: options.coverageDirectory ?? "<rootDir>/coverage",
    coveragePathIgnorePatterns: [
      "index.ts",
      "index.tsx",
      ...options.coveragePathIgnorePatterns ?? []
    ],
    testMatch: [
      "<rootDir>/src/**/*.test.{ts,tsx}",
      "<rootDir>/src/**/*.spec.{ts,tsx}",
      ...Array.isArray(options.testMatch) ? options.testMatch : typeof options.testMatch === "string" ? [options.testMatch] : []
    ]
  };
}
function createSwcJestConfig(options, swcConfig = {}) {
  return createBaseJestConfig({
    ...options,
    transform: {
      "^.+\\.(t|j|mj|cj)sx?$": [
        "@swc/jest",
        {
          ...swcConfig,
          jsc: {
            ...swcConfig.jsc,
            parser: {
              ...swcConfig.jsc?.parser,
              syntax: "typescript"
            },
            transform: {
              ...swcConfig.jsc?.transform,
              useDefineForClassFields: true
            },
            keepClassNames: true,
            externalHelpers: false
          }
        }
      ],
      ...options.transform ?? {}
    }
  });
}
function createTsJestConfig(options, tsJestConfig = {}) {
  return createBaseJestConfig({
    ...options,
    transform: {
      "^.+\\.(t|j|mj|cj)sx?$": [
        "ts-jest",
        {
          ...tsJestConfig
        }
      ],
      ...options.transform ?? {}
    }
  });
}

// src/paths-to-module-name-mapper.ts
var escapeRegex = (str) => str.replace(/[-\\^$*+?.()|[\]{}]/gu, "\\$&");
var pathsToModuleNameMapper = (mapping, { prefix = "", useESM = false } = {}) => {
  const jestMap = {};
  for (const fromPath of Object.keys(mapping)) {
    const toPaths = mapping[fromPath];
    if (toPaths.length === 0) continue;
    const segments = fromPath.split(/\*/gu);
    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(/\*/gu, "$1")}`;
      });
      if (useESM) {
        const esmPattern = `^${escapeRegex(segments[0])}(.*)${escapeRegex(segments[1])}\\.js$`;
        jestMap[esmPattern] = paths.length === 1 ? paths[0] : paths;
      }
      const cjsPattern = `^${escapeRegex(segments[0])}(.*)${escapeRegex(segments[1])}$`;
      jestMap[cjsPattern] = paths.length === 1 ? paths[0] : paths;
    }
  }
  if (useESM) jestMap["^(\\.{1,2}/.*)\\.js$"] = "$1";
  return jestMap;
};

export { createSwcJestConfig, createTsJestConfig, pathsToModuleNameMapper };
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