babel/packages/babel-core/test/config-chain.js
Nicolò Ribaudo ae06baf22f
Add support for babel.config.mjs and .babelrc.mjs (#10903)
* Add support for babel.config.mjs and .babelrc.mjs

* Use path.extname
2020-01-10 23:14:29 +01:00

1214 lines
36 KiB
JavaScript

import fs from "fs";
import os from "os";
import path from "path";
import escapeRegExp from "lodash/escapeRegExp";
import * as babel from "../lib";
// TODO: In Babel 8, we can directly uses fs.promises which is supported by
// node 8+
const pfs =
fs.promises ??
new Proxy(fs, {
get(target, name) {
if (name === "copyFile") {
// fs.copyFile is only supported since node 8.5
// https://stackoverflow.com/a/30405105/2359289
return function copyFile(source, target) {
const rd = fs.createReadStream(source);
const wr = fs.createWriteStream(target);
return new Promise(function(resolve, reject) {
rd.on("error", reject);
wr.on("error", reject);
wr.on("finish", resolve);
rd.pipe(wr);
}).catch(function(error) {
rd.destroy();
wr.end();
throw error;
});
};
}
return (...args) =>
new Promise((resolve, reject) =>
target[name](...args, (error, result) => {
if (error) reject(error);
else resolve(result);
}),
);
},
});
function fixture(...args) {
return path.join(__dirname, "fixtures", "config", ...args);
}
function loadOptions(opts) {
return babel.loadOptions({ cwd: __dirname, ...opts });
}
function loadOptionsAsync(opts) {
return babel.loadOptionsAsync({ cwd: __dirname, ...opts });
}
function pairs(items) {
const pairs = [];
for (let i = 0; i < items.length - 1; i++) {
for (let j = i + 1; j < items.length; j++) {
pairs.push([items[i], items[j]]);
}
}
return pairs;
}
async function getTemp(name) {
const cwd = await pfs.mkdtemp(os.tmpdir() + path.sep + name);
const tmp = name => path.join(cwd, name);
const config = name =>
pfs.copyFile(fixture("config-files-templates", name), tmp(name));
return { cwd, tmp, config };
}
describe("buildConfigChain", function() {
describe("test", () => {
describe("single", () => {
it("should process matching string values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
test: fixture("nonexistant-fake"),
comments: true,
});
expect(opts.comments).toBe(true);
});
it("should process matching RegExp values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
test: new RegExp(escapeRegExp(fixture("nonexistant-fake"))),
comments: true,
});
expect(opts.comments).toBe(true);
});
it("should process matching function values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
test: p => p.indexOf(fixture("nonexistant-fake")) === 0,
comments: true,
});
expect(opts.comments).toBe(true);
});
it("should process non-matching string values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
test: fixture("nonexistant-fake-unknown"),
comments: true,
});
expect(opts.comments).toBeUndefined();
});
it("should process non-matching RegExp values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
test: new RegExp(escapeRegExp(fixture("nonexistant-unknown"))),
comments: true,
});
expect(opts.comments).toBeUndefined();
});
it("should process non-matching function values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
test: p => p.indexOf(fixture("nonexistant-unknown")) === 0,
comments: true,
});
expect(opts.comments).toBeUndefined();
});
});
describe("array", () => {
it("should process matching string values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
test: [fixture("nonexistant-fake")],
comments: true,
});
expect(opts.comments).toBe(true);
});
it("should process matching RegExp values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
test: [new RegExp(escapeRegExp(fixture("nonexistant-fake")))],
comments: true,
});
expect(opts.comments).toBe(true);
});
it("should process matching function values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
test: [p => p.indexOf(fixture("nonexistant-fake")) === 0],
comments: true,
});
expect(opts.comments).toBe(true);
});
it("should process non-matching string values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
test: [fixture("nonexistant-fake-unknown")],
comments: true,
});
expect(opts.comments).toBeUndefined();
});
it("should process non-matching RegExp values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
test: [new RegExp(escapeRegExp(fixture("nonexistant-unknown")))],
comments: true,
});
expect(opts.comments).toBeUndefined();
});
it("should process non-matching function values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
test: [p => p.indexOf(fixture("nonexistant-unknown")) === 0],
comments: true,
});
expect(opts.comments).toBeUndefined();
});
});
});
describe("include", () => {
describe("single", () => {
it("should process matching string values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
include: fixture("nonexistant-fake"),
comments: true,
});
expect(opts.comments).toBe(true);
});
it("should process matching RegExp values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
include: new RegExp(escapeRegExp(fixture("nonexistant-fake"))),
comments: true,
});
expect(opts.comments).toBe(true);
});
it("should process matching function values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
include: p => p.indexOf(fixture("nonexistant-fake")) === 0,
comments: true,
});
expect(opts.comments).toBe(true);
});
it("should process non-matching string values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
include: fixture("nonexistant-fake-unknown"),
comments: true,
});
expect(opts.comments).toBeUndefined();
});
it("should process non-matching RegExp values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
include: new RegExp(escapeRegExp(fixture("nonexistant-unknown"))),
comments: true,
});
expect(opts.comments).toBeUndefined();
});
it("should process non-matching function values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
include: p => p.indexOf(fixture("nonexistant-unknown")) === 0,
comments: true,
});
expect(opts.comments).toBeUndefined();
});
});
describe("array", () => {
it("should process matching string values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
include: [fixture("nonexistant-fake")],
comments: true,
});
expect(opts.comments).toBe(true);
});
it("should process matching RegExp values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
include: [new RegExp(escapeRegExp(fixture("nonexistant-fake")))],
comments: true,
});
expect(opts.comments).toBe(true);
});
it("should process matching function values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
include: [p => p.indexOf(fixture("nonexistant-fake")) === 0],
comments: true,
});
expect(opts.comments).toBe(true);
});
it("should process non-matching string values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
include: [fixture("nonexistant-fake-unknown")],
comments: true,
});
expect(opts.comments).toBeUndefined();
});
it("should process non-matching RegExp values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
include: [new RegExp(escapeRegExp(fixture("nonexistant-unknown")))],
comments: true,
});
expect(opts.comments).toBeUndefined();
});
it("should process non-matching function values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
include: [p => p.indexOf(fixture("nonexistant-unknown")) === 0],
comments: true,
});
expect(opts.comments).toBeUndefined();
});
});
});
describe("exclude", () => {
describe("single", () => {
it("should process matching string values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
exclude: fixture("nonexistant-fake"),
comments: true,
});
expect(opts.comments).toBeUndefined();
});
it("should process matching RegExp values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
exclude: new RegExp(escapeRegExp(fixture("nonexistant-fake"))),
comments: true,
});
expect(opts.comments).toBeUndefined();
});
it("should process matching function values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
exclude: p => p.indexOf(fixture("nonexistant-fake")) === 0,
comments: true,
});
expect(opts.comments).toBeUndefined();
});
it("should process non-matching string values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
exclude: fixture("nonexistant-fake-unknown"),
comments: true,
});
expect(opts.comments).toBe(true);
});
it("should process non-matching RegExp values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
exclude: new RegExp(escapeRegExp(fixture("nonexistant-unknown"))),
comments: true,
});
expect(opts.comments).toBe(true);
});
it("should process non-matching function values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
exclude: p => p.indexOf(fixture("nonexistant-unknown")) === 0,
comments: true,
});
expect(opts.comments).toBe(true);
});
});
describe("array", () => {
it("should process matching string values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
exclude: [fixture("nonexistant-fake")],
comments: true,
});
expect(opts.comments).toBeUndefined();
});
it("should process matching RegExp values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
exclude: [new RegExp(escapeRegExp(fixture("nonexistant-fake")))],
comments: true,
});
expect(opts.comments).toBeUndefined();
});
it("should process matching function values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
exclude: [p => p.indexOf(fixture("nonexistant-fake")) === 0],
comments: true,
});
expect(opts.comments).toBeUndefined();
});
it("should process non-matching string values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
exclude: [fixture("nonexistant-fake-unknown")],
comments: true,
});
expect(opts.comments).toBe(true);
});
it("should process non-matching RegExp values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
exclude: [new RegExp(escapeRegExp(fixture("nonexistant-unknown")))],
comments: true,
});
expect(opts.comments).toBe(true);
});
it("should process non-matching function values", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
exclude: [p => p.indexOf(fixture("nonexistant-unknown")) === 0],
comments: true,
});
expect(opts.comments).toBe(true);
});
});
});
describe("ignore", () => {
it("should ignore files that match", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
ignore: [
fixture("nonexistant-fake", "src.js"),
// We had a regression where multiple ignore patterns broke things, so
// we keep some extra random items in here.
fixture("nonexistant-fake", "other.js"),
fixture("nonexistant-fake", "misc.js"),
],
});
expect(opts).toBeNull();
});
it("should not ignore files that don't match", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
ignore: [
fixture("nonexistant-fake", "other.js"),
fixture("nonexistant-fake", "misc.js"),
],
});
expect(opts).not.toBeNull();
});
});
describe("only", () => {
it("should ignore files that don't match", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
only: [
fixture("nonexistant-fake", "other.js"),
fixture("nonexistant-fake", "misc.js"),
],
});
expect(opts).toBeNull();
});
it("should not ignore files that match", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
only: [
fixture("nonexistant-fake", "src.js"),
fixture("nonexistant-fake", "misc.js"),
],
});
expect(opts).not.toBeNull();
});
});
describe("ignore/only", () => {
it("should ignore files that match ignore and don't match only", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
ignore: [fixture("nonexistant-fake", "src.js")],
only: [],
});
expect(opts).toBeNull();
});
it("should ignore files that match ignore and also only", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
ignore: [fixture("nonexistant-fake", "src.js")],
only: [fixture("nonexistant-fake", "src.js")],
});
expect(opts).toBeNull();
});
it("should not ignore files that match only and not ignore", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
only: [fixture("nonexistant-fake", "src.js")],
});
expect(opts).not.toBeNull();
});
it("should not ignore files when no ignore/only are specified", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
});
expect(opts).not.toBeNull();
});
it("should allow negation of only", () => {
const opts1 = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
only: [
"!" + fixture("nonexistant-fake"),
fixture("nonexistant-fake", "other.js"),
],
});
expect(opts1).toBeNull();
const opts2 = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
only: [
"!" + fixture("nonexistant-fake"),
fixture("nonexistant-fake", "src.js"),
],
});
expect(opts2).not.toBeNull();
const opts3 = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "folder", "src.js"),
babelrc: false,
only: [
"!" + fixture("nonexistant-fake"),
fixture("nonexistant-fake", "folder"),
],
});
expect(opts3).not.toBeNull();
});
it("should allow negation of ignore", () => {
const opts1 = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
ignore: [
"!" + fixture("nonexistant-fake", "other.js"),
fixture("nonexistant-fake"),
],
});
expect(opts1).toBeNull();
// Tests disabled pending https://github.com/babel/babel/issues/6907
// const opts2 = loadOptions({
// cwd: fixture("nonexistant-fake"),
// filename: fixture("nonexistant-fake", "src.js"),
// babelrc: false,
// ignore: [
// "!" + fixture("nonexistant-fake", "src.js"),
// fixture("nonexistant-fake"),
// ],
// });
// expect(opts2).not.toBeNull();
//
// const opts3 = loadOptions({
// cwd: fixture("nonexistant-fake"),
// filename: fixture("nonexistant-fake", "folder", "src.js"),
// babelrc: false,
// ignore: [
// "!" + fixture("nonexistant-fake", "folder"),
// fixture("nonexistant-fake"),
// ],
// });
// expect(opts3).not.toBeNull();
});
});
describe("caching", function() {
describe("programmatic options", function() {
const plugins1 = [() => ({})];
const plugins2 = [() => ({})];
it("should not cache the input options by identity", () => {
const inputOpts = { plugins: plugins1 };
const opts1 = loadOptions(inputOpts);
inputOpts.plugins = plugins2;
const opts2 = loadOptions(inputOpts);
expect(opts1.plugins).toHaveLength(1);
expect(opts2.plugins).toHaveLength(1);
expect(opts1.plugins[0]).not.toBe(opts2.plugins[1]);
});
it("should cache the env plugins by identity", () => {
const plugins = [() => ({})];
const opts1 = loadOptions({
envName: "foo",
env: {
foo: {
plugins,
},
},
});
const opts2 = loadOptions({
envName: "foo",
env: {
foo: {
plugins,
},
},
});
expect(opts1.plugins).toHaveLength(1);
expect(opts2.plugins).toHaveLength(1);
expect(opts1.plugins[0]).toBe(opts2.plugins[0]);
});
it("should cache the env presets by identity", () => {
const presets = [() => ({ plugins: [() => ({})] })];
const opts1 = loadOptions({
envName: "foo",
env: {
foo: {
presets,
},
},
});
const opts2 = loadOptions({
envName: "foo",
env: {
foo: {
presets,
},
},
});
expect(opts1.plugins).toHaveLength(1);
expect(opts2.plugins).toHaveLength(1);
expect(opts1.plugins[0]).toBe(opts2.plugins[0]);
});
it("should cache the plugin options by identity", () => {
const plugins = [() => ({})];
const opts1 = loadOptions({ plugins });
const opts2 = loadOptions({ plugins });
expect(opts1.plugins).toHaveLength(1);
expect(opts2.plugins).toHaveLength(1);
expect(opts1.plugins[0]).toBe(opts2.plugins[0]);
});
it("should cache the presets options by identity", () => {
const presets = [() => ({ plugins: [() => ({})] })];
const opts1 = loadOptions({ presets });
const opts2 = loadOptions({ presets });
expect(opts1.plugins).toHaveLength(1);
expect(opts2.plugins).toHaveLength(1);
expect(opts1.plugins[0]).toBe(opts2.plugins[0]);
});
it("should not cache the presets options with passPerPreset", () => {
const presets = [() => ({ plugins: [() => ({})] })];
const opts1 = loadOptions({ presets });
const opts2 = loadOptions({ presets, passPerPreset: true });
const opts3 = loadOptions({ presets, passPerPreset: false });
expect(opts1.plugins).toHaveLength(1);
expect(opts2.plugins).toHaveLength(0);
expect(opts3.plugins).toHaveLength(1);
expect(opts1.plugins[0]).toBe(opts3.plugins[0]);
});
});
describe("config file options", function() {
function touch(filepath) {
const s = fs.statSync(filepath);
fs.utimesSync(
filepath,
s.atime,
s.mtime + Math.random() > 0.5 ? 1 : -1,
);
}
it("should cache package.json files by mtime", () => {
const filename = fixture(
"complex-plugin-config",
"config-identity",
"pkg",
"src.js",
);
const pkgJSON = fixture(
"complex-plugin-config",
"config-identity",
"pkg",
"package.json",
);
const opts1 = loadOptions({ filename, cwd: path.dirname(filename) });
const opts2 = loadOptions({ filename, cwd: path.dirname(filename) });
touch(pkgJSON);
const opts3 = loadOptions({ filename, cwd: path.dirname(filename) });
const opts4 = loadOptions({ filename, cwd: path.dirname(filename) });
expect(opts1.plugins).toHaveLength(1);
expect(opts2.plugins).toHaveLength(1);
expect(opts1.plugins[0]).toBe(opts2.plugins[0]);
expect(opts1.plugins).toHaveLength(1);
expect(opts2.plugins).toHaveLength(1);
expect(opts3.plugins[0]).toBe(opts4.plugins[0]);
// Identity changed after touch().
expect(opts1.plugins[0]).not.toBe(opts3.plugins[0]);
});
it("should cache .babelrc files by mtime", () => {
const filename = fixture(
"complex-plugin-config",
"config-identity",
"babelrc",
"src.js",
);
const babelrcFile = fixture(
"complex-plugin-config",
"config-identity",
"babelrc",
".babelrc",
);
const opts1 = loadOptions({ filename, cwd: path.dirname(filename) });
const opts2 = loadOptions({ filename, cwd: path.dirname(filename) });
touch(babelrcFile);
const opts3 = loadOptions({ filename, cwd: path.dirname(filename) });
const opts4 = loadOptions({ filename, cwd: path.dirname(filename) });
expect(opts1.plugins).toHaveLength(1);
expect(opts2.plugins).toHaveLength(1);
expect(opts1.plugins[0]).toBe(opts2.plugins[0]);
expect(opts3.plugins).toHaveLength(1);
expect(opts4.plugins).toHaveLength(1);
expect(opts3.plugins[0]).toBe(opts4.plugins[0]);
// Identity changed after touch().
expect(opts1.plugins[0]).not.toBe(opts3.plugins[0]);
});
it("should cache .babelrc.js files programmable behavior", () => {
const filename = fixture(
"complex-plugin-config",
"config-identity",
"babelrc-js",
"src.js",
);
const opts1 = loadOptions({ filename, cwd: path.dirname(filename) });
const opts2 = loadOptions({ filename, cwd: path.dirname(filename) });
const opts3 = loadOptions({
filename,
envName: "new-env",
cwd: path.dirname(filename),
});
const opts4 = loadOptions({
filename,
envName: "new-env",
cwd: path.dirname(filename),
});
expect(opts1.plugins).toHaveLength(1);
expect(opts2.plugins).toHaveLength(1);
expect(opts1.plugins[0]).toBe(opts2.plugins[0]);
expect(opts3.plugins).toHaveLength(1);
expect(opts4.plugins).toHaveLength(1);
expect(opts3.plugins[0]).toBe(opts4.plugins[0]);
// Identity changed with different .env
expect(opts1.plugins[0]).not.toBe(opts3.plugins[0]);
});
});
});
describe("overrides merging", () => {
it("should apply matching overrides over base configs", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
comments: true,
overrides: [
{
test: fixture("nonexistant-fake"),
comments: false,
},
],
});
expect(opts.comments).toBe(false);
});
it("should not apply non-matching overrides over base configs", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
comments: true,
overrides: [
{
test: fixture("nonexistant-unknown"),
comments: false,
},
],
});
expect(opts.comments).toBe(true);
});
it("should remove the overrides and filtering fields from the options", () => {
const opts = loadOptions({
cwd: fixture("nonexistant-fake"),
filename: fixture("nonexistant-fake", "src.js"),
babelrc: false,
overrides: [],
test: /^/,
include: /^/,
exclude: [],
});
expect(opts.overrides).toBeUndefined();
expect(opts.test).toBeUndefined();
expect(opts.include).toBeUndefined();
expect(opts.exclude).toBeUndefined();
});
});
describe("config files", () => {
const getDefaults = () => ({
babelrc: false,
configFile: false,
cwd: process.cwd(),
root: process.cwd(),
envName: "development",
passPerPreset: false,
plugins: [],
presets: [],
});
const realEnv = process.env.NODE_ENV;
const realBabelEnv = process.env.BABEL_ENV;
beforeAll(() => {
delete process.env.NODE_ENV;
delete process.env.BABEL_ENV;
});
afterAll(() => {
if (realEnv) {
process.env.NODE_ENV = realEnv;
process.env.NODE_ENV = realBabelEnv;
}
});
describe("root", () => {
test.each(["babel.config.json", "babel.config.js", "babel.config.cjs"])(
"should load %s synchronously",
async name => {
const { cwd, tmp, config } = await getTemp(
`babel-test-load-config-sync-${name}`,
);
const filename = tmp("src.js");
await config(name);
expect(loadOptions({ filename, cwd })).toEqual({
...getDefaults(),
filename,
cwd,
root: cwd,
comments: true,
});
},
);
test("should not load babel.config.mjs synchronously", async () => {
const { cwd, tmp, config } = await getTemp(
"babel-test-load-config-sync-babel.config.mjs",
);
const filename = tmp("src.js");
await config("babel.config.mjs");
expect(() => loadOptions({ filename, cwd })).toThrow(
/is only supported when running Babel asynchronously/,
);
});
test.each([
"babel.config.json",
"babel.config.js",
"babel.config.cjs",
"babel.config.mjs",
])("should load %s asynchronously", async name => {
const { cwd, tmp, config } = await getTemp(
`babel-test-load-config-async-${name}`,
);
const filename = tmp("src.js");
await config(name);
expect(await loadOptionsAsync({ filename, cwd })).toEqual({
...getDefaults(),
filename,
cwd,
root: cwd,
comments: true,
});
});
test.each(
pairs([
"babel.config.json",
"babel.config.js",
"babel.config.cjs",
"babel.config.mjs",
]),
)("should throw if both %s and %s are used", async (name1, name2) => {
const { cwd, tmp, config } = await getTemp(
`babel-test-dup-config-${name1}-${name2}`,
);
await Promise.all([config(name1), config(name2)]);
await expect(
loadOptionsAsync({ filename: tmp("src.js"), cwd }),
).rejects.toThrow(/Multiple configuration files found/);
});
});
describe("relative", () => {
test.each(["package.json", ".babelrc", ".babelrc.js", ".babelrc.cjs"])(
"should load %s synchronously",
async name => {
const { cwd, tmp, config } = await getTemp(
`babel-test-load-config-${name}`,
);
const filename = tmp("src.js");
await config(name);
expect(loadOptions({ filename, cwd })).toEqual({
...getDefaults(),
filename,
cwd,
root: cwd,
comments: true,
});
},
);
test("should not load .babelrc.mjs synchronously", async () => {
const { cwd, tmp, config } = await getTemp(
"babel-test-load-config-sync-.babelrc.mjs",
);
const filename = tmp("src.js");
await config(".babelrc.mjs");
expect(() => loadOptions({ filename, cwd })).toThrow(
/is only supported when running Babel asynchronously/,
);
});
test.each([
"package.json",
".babelrc",
".babelrc.js",
".babelrc.cjs",
".babelrc.mjs",
])("should load %s asynchronously", async name => {
const { cwd, tmp, config } = await getTemp(
`babel-test-load-config-${name}`,
);
const filename = tmp("src.js");
await config(name);
expect(await loadOptionsAsync({ filename, cwd })).toEqual({
...getDefaults(),
filename,
cwd,
root: cwd,
comments: true,
});
});
it("should load .babelignore", () => {
const filename = fixture("config-files", "babelignore", "src.js");
expect(
loadOptions({ filename, cwd: path.dirname(filename) }),
).toBeNull();
});
test.each(
pairs([
"package.json",
".babelrc",
".babelrc.js",
".babelrc.cjs",
".babelrc.mjs",
]),
)("should throw if both %s and %s are used", async (name1, name2) => {
const { cwd, tmp, config } = await getTemp(
`babel-test-dup-config-${name1}-${name2}`,
);
await Promise.all([config(name1), config(name2)]);
await expect(
loadOptionsAsync({ filename: tmp("src.js"), cwd }),
).rejects.toThrow(/Multiple configuration files found/);
});
it("should ignore package.json without a 'babel' property", () => {
const filename = fixture("config-files", "pkg-ignored", "src.js");
expect(loadOptions({ filename, cwd: path.dirname(filename) })).toEqual({
...getDefaults(),
filename: filename,
cwd: path.dirname(filename),
root: path.dirname(filename),
comments: true,
});
});
test.each`
config | dir | error
${".babelrc"} | ${"babelrc-error"} | ${/Error while parsing config - /}
${".babelrc.js"} | ${"babelrc-js-error"} | ${/Babelrc threw an error/}
${".babelrc.cjs"} | ${"babelrc-cjs-error"} | ${/Babelrc threw an error/}
${".babelrc.mjs"} | ${"babelrc-mjs-error"} | ${/Babelrc threw an error/}
${"package.json"} | ${"pkg-error"} | ${/Error while parsing JSON - /}
`("should show helpful errors for $config", async ({ dir, error }) => {
const filename = fixture("config-files", dir, "src.js");
await expect(
loadOptionsAsync({ filename, cwd: path.dirname(filename) }),
).rejects.toThrow(error);
});
});
it("should throw when `test` presents but `filename` is not passed", () => {
expect(() => loadOptions({ test: /\.ts$/, plugins: [] })).toThrow(
/Configuration contains string\/RegExp pattern/,
);
});
it("should throw when `preset` requires `filename` but it was not passed", () => {
expect(() => {
loadOptions({
presets: [require("./fixtures/config-loading/preset4")],
});
}).toThrow(/Preset \/\* your preset \*\/ requires a filename/);
});
it("should throw when `preset.overrides` requires `filename` but it was not passed", () => {
expect(() => {
loadOptions({
presets: [require("./fixtures/config-loading/preset5")],
});
}).toThrow(/Preset \/\* your preset \*\/ requires a filename/);
});
});
});