server.close() gives "server not running" in afterEach mocha hook - express

Question

I'm trying to run a test suite with mocha, the goal is to start the server beforeEach test case and then
close it afterEach test case.
But for some reason when the afterEach case ignites I get the following error:
Error [ERR_SERVER_NOT_RUNNING]: Server is not running.
The test case passes which means the server is up and running.
I Export the server like this from my app.js file:
var server = app.listen(3000, function () {
var port = server.address().port;
console.log("Example app listening at port %s", port);
});
module.exports = server; // Export server in order to use it in test files
My test file:
describe("loading express", function () {
var server;
before(function (done) {
User.deleteMany(done);
});
beforeEach(function () {
server = require("../app");
});
afterEach(function (done) {
server.close(done);
});
describe("Create user account with valid email address", function () {
describe("Route: POST /signup", () => {
it("201 HAPPY PATH", (done) => {
chai
.request(server)
.post("/signup")
.send({
email: "test23222#test.test",
password: "12345678",
firstname: "testtest",
lastname: "testtest",
})
.end((err, res) => {
res.should.have.status(201);
done();
});
});
});
});
});
I believe I need to export a promise.
This is what I got so far:
var server = new Promise(function (resolve, reject) {
app.listen(3000, function () {
var port = server.address().port;
console.log("Example app listening at port %s", port);
resolve();
});
}
module.exports = server; // Export server in order to use it in test files
in test suite:
var server = require('./app.js')
server.then(function() {
....
}

Answer 1

The server is closed by chai-http every time a request is served.
From the chai-http docs:
If you want to keep the server open, perhaps if you’re making multiple requests, you must call .keepOpen() after .request(), and manually close the server down:
E.g:
chai
.request(server)
.keepOpen() // <-- Here
.post("/signup")
.send({
email: "test23222#test.test",
password: "12345678",
firstname: "testtest",
lastname: "testtest",
})