(Jest, Supertest) API 단위 통합 테스트

Middleware with Jest

import httpMocks from "node-mocks-http";
import status from "http-status";
import { findHouse } from "../../../middleware/house";

describe("Middleware - House", () => {
    it("[체크인/체크아웃, 인원, 가격] 필터로 조회 후 결과를 반환한다.", async () => {
        // given
        const query = {
            checkInOut: [
                new Date("2016-10-01 00:00:00 GMT+0900"),
                new Date("2016-10-03 00:00:00 GMT+0900")
            ],
            capacity: [3],
            price: [0, 100]
        };

        const req = httpMocks.createRequest({
            query
        });
        const res = httpMocks.createResponse();
        const next = jest.fn();

        // when
        await findHouse(req, res, next);

        // then
        expect(res.get("Content-Type")).toEqual("application/json");
        expect(res.json()).toEqual(/* 기대하는 결과 값 */);
        expect(res.statusCode).toEqual(status.OK);
    });
});

Route with Supertest

import supertest from "supertest";
import status from "http-status";
const agent = supertest.agent("http://localhost");

describe("Routes - House", () => {
    test("GET /house", async () => {
        // given
        const query = {
            checkInOut: [
                new Date("2016-10-01 00:00:00 GMT+0900"),
                new Date("2016-10-03 00:00:00 GMT+0900")
            ],
            price: [0, 800],
            capacity: [3]
        };

        // when
        const response = await agent.get("/house").query(query);

        // then
        expect(response.header["content-type"]).toEqual(
            "application/json; charset=utf-8"
        );
        expect(response.body.length > 0).toBeTruthy();
        expect(response.statusCode).toEqual(status.OK);
    });
});