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@apto-payments/test-server
Advanced tools
Wrapper over msw to generate stubs on jest environments
Testing utility to be used together with jest and msw.
Install @apto-payments/test-server as a dev dependency.
npm i -D @apto-payments/test-server @apto-payments/test-server-matchers
You might need to install the peer-dependencies yourself.
npm i -D jest msw
Edit your jest setup files to configure the test server.
Usually this file is named setupTests.ts
, you just need to add 3 steps:
// setupTests.ts
import server from "@apto-payments/test-server";
// (Recommended but optional) include the extended matchers
import '@apto-payments/test-server-matchers';
/**
* Start the test-server at the beginning
*/
beforeAll(() => {
server.listen({ onUnhandledRequest: "warn" });
});
/**
* Reset every test-server handler after each test
*/
afterEach(() => {
server.resetHandlers();
});
/**
* Close the server once tests are finished
*/
afterAll(() => server.close());
Use this library to stub responses from the server while keeping your tests as deep as possible
import mockServer from "@apto-payments/test-server";
import { render, screen, waitFor } from "@testing-library/react";
import { useEffect, useState } from "react";
it("should stub the given server requests", async () => {
const spy1 = mockServer.stubJSONResponse(
method: "get",
path: "*/foo/bar",
response: { data: "hello" },
status: 200,
});
const spy2 = mockServer.stubJSONResponse(
method: "get",
path: "*/foo/baz",
response: { data: "world" },
status: 200,
});
const res1 = await fetch("/foo/bar").then((res) => res.json());
const res2 = await fetch("/foo/baz").then((res) => res.json());
// We can assert on the returned spies
expect(spy1).toHaveBeenCalledWith(
expect.objectContaining({ method: "GET" }),
);
expect(spy2).toHaveBeenCalledWith(
expect.objectContaining({ method: "GET" }),
);
// Optionally we can use the custom matchers
expect(spy1).toHaveBeenCalledWithUrl("/foo/bar", { exact: false });
// The responses are the ones given by the test server
expect(res1.data).toBe("hello");
expect(res2.data).toBe("world");
});
it("should work fine with a react Element", () => {
function DummyComponent() {
const [serverResponse, setServerResponse] = useState();
useEffect(() => {
fetch("/some/url")
.then((res) => res.json())
.then(setServerResponse);
}, []);
if (!setServerResponse) {
return <div>Loading</div>;
}
return <div>{serverResponse}</div>;
}
mockServer.stubJSONResponse({
method: "get",
path: "*/some/url",
response: "This is the response from the server",
status: 200,
});
render(<DummyComponent />);
return waitFor(() => {
expect(
screen.getByText("This is the response from the server")
).toBeVisible();
});
});
FAQs
Wrapper over msw to generate stubs on jest environments
We found that @apto-payments/test-server demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 2 open source maintainers collaborating on the project.
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