I am unable to invalidate the require cache / jest cache.
The second require gets the same file content even though it was changed.
This works as expected.
import { existsSync, unlinkSync, writeFileSync } from "fs";
import { resolve } from "path";
const logModules = () => {
console.log(
Object.keys(require.cache).filter((x) => x.indexOf("node_modules") === -1)
);
};
const filePath = "/tmp/test.js";
// lets write a module
writeFileSync(filePath, "module.exports = 'test';");
console.log(existsSync(filePath)); // true
console.log(require(filePath)); // 'test'
unlinkSync(filePath); // true
logModules(); // tmp/test.js is there as expected
delete require.cache[resolve(filePath)];
logModules(); // tmp/test.js is gone
// lets write a different module but at the same file path a.k.a changing
writeFileSync(filePath, "module.exports = 'second test';");
console.log(existsSync(filePath)); // true
console.log(require(filePath)); // 'test second'
unlinkSync(filePath); // true
This doesn't work.
In my jest test, it's not working. The second test's require resolves to the same content.
const filePath = "/tmp/test.js";
describe("what?", () => {
it("run 1", async () => {
// lets write a module
writeFileSync(filePath, "module.exports = 'test';");
console.log(existsSync(filePath)); // true
expect(require(filePath)).toBe("test"); // true
unlinkSync(filePath); // true
logModules(); // tmp/test.js is there as expected
delete require.cache[resolve(filePath)];
logModules(); // tmp/test.js is still there
jest.resetModules();
logModules(); // tmp/test.js is gone
});
it("run 2, fails", async () => {
// lets write a different module but at the same file path a.k.a changing
writeFileSync(filePath, "module.exports = 'second test';");
console.log(existsSync(filePath)); // true
expect(require(filePath)).toBe("second test"); // FAIL
/*
Expected: "second test"
Received: "test"
*/
unlinkSync(filePath);
});
});