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✅ Add a test to guarantee buffers order #157

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Feb 8, 2022
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✅ Add a test to guarantee buffers order #157

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0 src/main.spec.ts → src/main.integration.spec.ts
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55 changes: 55 additions & 0 deletions src/main.unit.spec.ts
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Original file line number Diff line number Diff line change
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import { nodeHtmlToImage } from "./main";
import { Cluster } from "puppeteer-cluster";

import { Screenshot } from "./models/Screenshot";

const sleep = (ms) => new Promise((resolve) => setTimeout(resolve, ms));

describe("node-html-to-image | Unit", () => {
let mockExit;
const buffer1 = Buffer.alloc(1);
const buffer2 = Buffer.alloc(1);
const html = "<html><body>{{message}}</body></html>";

beforeEach(() => {
jest.spyOn(Cluster, "launch").mockImplementation(
// eslint-disable-next-line @typescript-eslint/ban-ts-comment
// @ts-ignore
jest.fn(() => ({
execute: jest
.fn()
.mockImplementationOnce(async () => {
const screenshot = new Screenshot({ html });
screenshot.setBuffer(buffer1);
await sleep(10);
return screenshot;
})
.mockImplementationOnce(() => {
const screenshot = new Screenshot({ html });
screenshot.setBuffer(buffer2);
return screenshot;
}),
idle: jest.fn(),
close: jest.fn(),
}))
);
mockExit = jest.spyOn(process, "exit").mockImplementation((number) => {
throw new Error("process.exit: " + number);
});
});

afterEach(() => {
mockExit.mockRestore();
});

it("should sort buffer in the right order", async () => {
const result = await nodeHtmlToImage({
html,
content: [{ message: "Hello world!" }, { message: "Bonjour monde!" }],
});

expect(result).toEqual([buffer1, buffer2]);
});
});

jest.mock("puppeteer-cluster");