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index.js
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index.js
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import readdir from "fs-readdir-recursive";
import * as helper from "@babel/helper-fixtures";
import rimraf from "rimraf";
import child from "child_process";
import path from "path";
import fs from "fs";
import { fileURLToPath } from "url";
import { createRequire } from "module";
import { jest } from "@jest/globals";
import { chmod } from "../lib/babel/util";
const require = createRequire(import.meta.url);
const dirname = path.dirname(fileURLToPath(import.meta.url));
const fixtureLoc = path.join(dirname, "fixtures");
const tmpLoc = path.join(dirname, "tmp");
const rootDir = path.resolve(dirname, "../../..");
const fileFilter = function (x) {
return x !== ".DS_Store";
};
const outputFileSync = function (filePath, data) {
fs.mkdirSync(path.dirname(filePath), { recursive: true });
fs.writeFileSync(filePath, data);
};
const presetLocs = [path.join(rootDir, "./packages/babel-preset-react")];
const pluginLocs = [
path.join(rootDir, "./packages/babel-plugin-transform-arrow-functions"),
path.join(rootDir, "./packages/babel-plugin-transform-strict-mode"),
path.join(rootDir, "./packages/babel-plugin-transform-modules-commonjs"),
].join(",");
const readDir = function (loc, filter) {
const files = {};
if (fs.existsSync(loc)) {
readdir(loc, filter).forEach(function (filename) {
files[filename] = helper.readFile(path.join(loc, filename));
});
}
return files;
};
const saveInFiles = function (files) {
// Place an empty .babelrc in each test so tests won't unexpectedly get to repo-level config.
if (!fs.existsSync(".babelrc")) {
outputFileSync(".babelrc", "{}");
}
Object.keys(files).forEach(function (filename) {
const content = files[filename];
outputFileSync(filename, content);
});
};
function escapeRegExp(string) {
return string.replace(/[|\\{}()[\]^$+*?.]/g, "\\$&");
}
const normalizeOutput = function (str, cwd) {
let result = str
.replace(/\(\d+ms\)/g, "(123ms)")
.replace(new RegExp(escapeRegExp(cwd), "g"), "<CWD>")
// (non-win32) /foo/babel/packages -> <CWD>/packages
// (win32) C:\foo\babel\packages -> <CWD>\packages
.replace(new RegExp(escapeRegExp(rootDir), "g"), "<ROOTDIR>");
if (process.platform === "win32") {
result = result
// C:\\foo\\babel\\packages -> <CWD>\\packages (in js string literal)
.replace(
new RegExp(escapeRegExp(rootDir.replace(/\\/g, "\\\\")), "g"),
"<ROOTDIR>",
);
}
return result;
};
const assertTest = function (stdout, stderr, opts, cwd) {
stdout = normalizeOutput(stdout, cwd);
stderr = normalizeOutput(stderr, cwd);
const expectStderr = opts.stderr.trim();
stderr = stderr.trim();
if (opts.stderr) {
if (opts.stderrContains) {
expect(stderr).toContain(expectStderr);
} else {
expect(stderr).toBe(expectStderr);
}
} else if (stderr) {
throw new Error("stderr:\n" + stderr);
}
const expectStdout = opts.stdout.trim();
stdout = stdout.trim();
stdout = stdout.replace(/\\/g, "/");
if (opts.stdout) {
if (opts.stdoutContains) {
expect(stdout).toContain(expectStdout);
} else {
fs.writeFileSync(opts.stdoutPath, stdout + "\n");
expect(stdout).toBe(expectStdout);
}
} else if (stdout) {
throw new Error("stdout:\n" + stdout);
}
if (opts.outFiles) {
const actualFiles = readDir(tmpLoc, fileFilter);
Object.keys(actualFiles).forEach(function (filename) {
try {
if (
// saveInFiles always creates an empty .babelrc, so lets exclude for now
filename !== ".babelrc" &&
filename !== ".babelignore" &&
!Object.prototype.hasOwnProperty.call(opts.inFiles, filename)
) {
const expected = opts.outFiles[filename];
const actual = actualFiles[filename];
expect(actual).toBe(expected ?? "");
}
} catch (e) {
e.message += "\n at " + filename;
throw e;
}
});
Object.keys(opts.outFiles).forEach(function (filename) {
expect(actualFiles).toHaveProperty([filename]);
});
}
};
const buildTest = function (binName, testName, opts) {
const binLoc = path.join(dirname, "../lib", binName);
return function (callback) {
saveInFiles(opts.inFiles);
let args = [binLoc];
if (binName !== "babel-external-helpers") {
args.push("--presets", presetLocs, "--plugins", pluginLocs);
}
args = args.concat(opts.args);
const env = { ...process.env, ...opts.env };
const spawn = child.spawn(process.execPath, args, { env });
let stderr = "";
let stdout = "";
spawn.stderr.on("data", function (chunk) {
stderr += chunk;
});
spawn.stdout.on("data", function (chunk) {
stdout += chunk;
});
spawn.on("close", function () {
let err;
try {
assertTest(stdout, stderr, opts, tmpLoc);
} catch (e) {
err = e;
}
if (err) {
err.message =
args.map(arg => `"${arg}"`).join(" ") + ": " + err.message;
}
callback(err);
});
if (opts.stdin) {
spawn.stdin.write(opts.stdin);
spawn.stdin.end();
}
};
};
fs.readdirSync(fixtureLoc).forEach(function (binName) {
if (binName.startsWith(".")) return;
const suiteLoc = path.join(fixtureLoc, binName);
describe("bin/" + binName, function () {
let cwd;
beforeEach(() => {
cwd = process.cwd();
if (fs.existsSync(tmpLoc)) {
for (const child of fs.readdirSync(tmpLoc)) {
rimraf.sync(path.join(tmpLoc, child));
}
} else {
fs.mkdirSync(tmpLoc);
}
process.chdir(tmpLoc);
});
afterEach(() => {
process.chdir(cwd);
});
fs.readdirSync(suiteLoc).forEach(function (testName) {
if (testName.startsWith(".")) return;
const testLoc = path.join(suiteLoc, testName);
let opts = {
args: [],
};
const optionsLoc = path.join(testLoc, "options.json");
if (fs.existsSync(optionsLoc)) {
const taskOpts = require(optionsLoc);
if (taskOpts.os) {
let os = taskOpts.os;
if (!Array.isArray(os) && typeof os !== "string") {
throw new Error(
`'os' should be either string or string array: ${taskOpts.os}`,
);
}
if (typeof os === "string") {
os = [os];
}
if (!os.includes(process.platform)) {
return;
}
delete taskOpts.os;
}
opts = { args: [], ...taskOpts };
}
["stdout", "stdin", "stderr"].forEach(function (key) {
const loc = path.join(testLoc, key + ".txt");
opts[key + "Path"] = loc;
if (fs.existsSync(loc)) {
opts[key] = helper.readFile(loc);
} else {
opts[key] = opts[key] || "";
}
});
opts.outFiles = readDir(path.join(testLoc, "out-files"), fileFilter);
opts.inFiles = readDir(path.join(testLoc, "in-files"), fileFilter);
const babelrcLoc = path.join(testLoc, ".babelrc");
const babelIgnoreLoc = path.join(testLoc, ".babelignore");
if (fs.existsSync(babelrcLoc)) {
// copy .babelrc file to tmp directory
opts.inFiles[".babelrc"] = helper.readFile(babelrcLoc);
opts.inFiles[".babelignore"] = helper.readFile(babelIgnoreLoc);
}
if (fs.existsSync(babelIgnoreLoc)) {
// copy .babelignore file to tmp directory
opts.inFiles[".babelignore"] = helper.readFile(babelIgnoreLoc);
}
// eslint-disable-next-line jest/valid-title
it(testName, buildTest(binName, testName, opts), 20000);
});
});
});
describe("util.js", () => {
describe("chmod", () => {
it("should warn the user if chmod fails", () => {
const spyConsoleWarn = jest
.spyOn(console, "warn")
.mockImplementation(() => {});
// The first argument should be a string.
// The real reason chmod will fail is due to wrong permissions,
// but this is enough to cause a failure.
chmod(100, "file.js");
expect(spyConsoleWarn).toHaveBeenCalledTimes(1);
expect(spyConsoleWarn).toHaveBeenCalledWith(
"Cannot change permissions of file.js",
);
spyConsoleWarn.mockRestore();
});
});
});