/
index.js
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/
index.js
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const readdir = require("fs-readdir-recursive");
const helper = require("@babel/helper-fixtures");
const rimraf = require("rimraf");
const outputFileSync = require("output-file-sync");
const child = require("child_process");
const merge = require("lodash/merge");
const path = require("path");
const fs = require("fs");
const fixtureLoc = path.join(__dirname, "fixtures");
const tmpLoc = path.join(__dirname, "tmp");
const fileFilter = function(x) {
return x !== ".DS_Store";
};
const presetLocs = [path.join(__dirname, "../../babel-preset-react")];
const pluginLocs = [
path.join(__dirname, "/../../babel-plugin-transform-arrow-functions"),
path.join(__dirname, "/../../babel-plugin-transform-strict-mode"),
path.join(__dirname, "/../../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);
});
};
const replacePaths = function(str, cwd) {
let prev;
do {
prev = str;
str = str.replace(cwd, "<CWD>");
} while (str !== prev);
return str;
};
const assertTest = function(stdout, stderr, opts, cwd) {
stdout = replacePaths(stdout, cwd);
stderr = replacePaths(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 {
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) {
if (
// saveInFiles always creates an empty .babelrc, so lets exclude for now
filename !== ".babelrc" &&
!Object.prototype.hasOwnProperty.call(opts.inFiles, filename)
) {
const expected = opts.outFiles[filename];
const actual = actualFiles[filename];
expect(expected).not.toBeUndefined();
if (expected) {
expect(actual).toBe(expected);
}
}
});
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) {
const dir = process.cwd();
process.chdir(__dirname);
if (fs.existsSync(tmpLoc)) rimraf.sync(tmpLoc);
fs.mkdirSync(tmpLoc);
process.chdir(tmpLoc);
saveInFiles(opts.inFiles);
let args = [binLoc];
if (binName !== "babel-external-helpers") {
args.push("--presets", presetLocs, "--plugins", pluginLocs);
}
args = args.concat(opts.args);
const spawn = child.spawn(process.execPath, args);
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;
}
process.chdir(dir);
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() {
fs.readdirSync(suiteLoc).forEach(function(testName) {
if (testName.startsWith(".")) return;
const testLoc = path.join(suiteLoc, testName);
const opts = {
args: [],
};
const optionsLoc = path.join(testLoc, "options.json");
if (fs.existsSync(optionsLoc)) merge(opts, require(optionsLoc));
["stdout", "stdin", "stderr"].forEach(function(key) {
const loc = path.join(testLoc, key + ".txt");
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");
if (fs.existsSync(babelrcLoc)) {
// copy .babelrc file to tmp directory
opts.inFiles[".babelrc"] = helper.readFile(babelrcLoc);
}
it(testName, buildTest(binName, testName, opts));
});
});
});