Express Mock Jest
This library simulates a http request to load express modules without start the application, working with Jest.
MockRouter
This mock receives the express router exported module. The MockRouter object has all http methods (get, post, put, delete), you can execute requests without start the entire application.
import { MockRouter } from "@carlosrpj/jest-mock-express";
import router from "../../src/routes/api";
const mockRouter = new MockRouter(router);
it("should return a user list", async () => {
await mockRouter.get("/users");
expect(mockRouter.res.send).toBeCalledWith([
{ name: "Foo", email: "test@example.com" },
]);
});
MockRouter.headers
You can define your request headers with headers function, simulating a http request. This function replace all actual headers.
await mockRouter
.headers({
Authorization: "Bearer TOKEN",
"Content-Type": "application/json",
})
.get("/users");
MockRouter.header
Adding a header to request.
await mockRouter.header("Authorization", "Bearer TOKEN").get("/users");
MockRouter.params
Adding many params. This function replace all actual params.
await mockRouter.params({ id: 1 }).get("/users/1");
MockRouter.param
Adding a param to request.
await mockRouter.param("id", 1).get("/users/1");
MockRouter.query
Adding a query to request.
You can use a object with many queries, or a single key/value.
// many queries
await mockRouter.query({ id: 1 }).get("/users/1");
// single key/value
await mockRouter.query("name", "foo").get("/users/1");
MockRouter.body
Adding a body to request.
await mockRouter
.body({ name: "Foo", email: "test@example.com" })
.post("/users");
