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index.js
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index.js
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import { expect } from "chai";
import fs from "fs";
import path from "path";
import decache from "decache";
const testCacheFilename = path.join(__dirname, ".babel");
const oldBabelDisableCacheValue = process.env.BABEL_DISABLE_CACHE;
process.env.BABEL_CACHE_PATH = testCacheFilename;
delete process.env.BABEL_DISABLE_CACHE;
function writeCache(data) {
if (typeof data === "object") {
data = JSON.stringify(data);
}
fs.writeFileSync(testCacheFilename, data);
}
function cleanCache() {
try {
fs.unlinkSync(testCacheFilename);
} catch (e) {
// It is convenient to always try to clear
}
}
function resetCache() {
process.env.BABEL_CACHE_PATH = null;
process.env.BABEL_DISABLE_CACHE = oldBabelDisableCacheValue;
}
describe("babel register", () => {
describe("cache", () => {
let load, get, save;
beforeEach(() => {
// Since lib/cache is a singleton we need to fully reload it
decache("../lib/cache");
const cache = require("../lib/cache");
load = cache.load;
get = cache.get;
save = cache.save;
});
afterEach(cleanCache);
after(resetCache);
it("should load and get cached data", () => {
writeCache({ foo: "bar" });
load();
expect(get()).to.be.an("object");
expect(get()).to.deep.equal({ foo: "bar" });
});
it("should load and get an object with no cached data", () => {
load();
expect(get()).to.be.an("object");
expect(get()).to.deep.equal({});
});
it("should load and get an object with invalid cached data", () => {
writeCache("foobar");
load();
expect(get()).to.be.an("object");
expect(get()).to.deep.equal({});
});
it("should create the cache on save", () => {
save();
expect(fs.existsSync(testCacheFilename)).to.be.true;
expect(get()).to.deep.equal({});
});
});
});