Carlos Florêncio
109 lines
2.9 KiB
TypeScript
109 lines
2.9 KiB
TypeScript
import { EventEmitter } from "node:events";
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import { PassThrough } from "node:stream";
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import type { ChildProcess } from "node:child_process";
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import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
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const spawnMock = vi.fn();
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vi.mock("node:child_process", () => ({
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spawn: (...args: unknown[]) => spawnMock(...args),
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}));
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import { launchWebApp } from "./web";
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type Supervisor = {
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children: Array<{ pid?: number }>;
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shutdown: (reason: string) => Promise<void>;
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attachSignalHandlers: () => void;
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};
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class FakeChildProcess extends EventEmitter {
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pid = 12345;
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stderr = new PassThrough();
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}
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function createSupervisor(): Supervisor {
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return {
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children: [],
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shutdown: vi.fn().mockResolvedValue(undefined),
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attachSignalHandlers: vi.fn(),
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};
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}
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describe("launchWebApp", () => {
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beforeEach(() => {
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spawnMock.mockReset();
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});
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afterEach(() => {
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vi.restoreAllMocks();
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});
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it("does not auto-open browser as a side effect", () => {
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const proc = new FakeChildProcess() as unknown as ChildProcess;
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spawnMock.mockReturnValue(proc);
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const supervisor = createSupervisor();
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const launched = launchWebApp({
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command: "node",
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args: ["server.js"],
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cwd: "/tmp",
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env: process.env,
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supervisor: supervisor as any,
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label: "web",
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});
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expect(launched).toBe(proc);
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expect(supervisor.children).toContain(proc);
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expect(spawnMock).toHaveBeenCalledTimes(1);
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});
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it("pipes stderr in quiet mode", () => {
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const proc = new FakeChildProcess() as unknown as ChildProcess;
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const pipeSpy = vi.spyOn(proc.stderr as PassThrough, "pipe");
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spawnMock.mockReturnValue(proc);
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const supervisor = createSupervisor();
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launchWebApp({
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command: "node",
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args: ["server.js"],
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cwd: "/tmp",
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env: process.env,
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supervisor: supervisor as any,
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label: "web",
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quiet: true,
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});
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expect(spawnMock).toHaveBeenCalledWith("node", ["server.js"], {
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cwd: "/tmp",
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env: process.env,
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stdio: ["ignore", "pipe", "pipe"],
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});
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expect(pipeSpy).toHaveBeenCalledWith(process.stderr);
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});
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it("shuts down supervisor when web process exits", async () => {
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const proc = new FakeChildProcess() as unknown as ChildProcess;
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spawnMock.mockReturnValue(proc);
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const supervisor = createSupervisor();
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const consoleErrorSpy = vi.spyOn(console, "error").mockImplementation(() => {});
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vi.spyOn(process, "exit").mockImplementation((() => undefined) as never);
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launchWebApp({
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command: "node",
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args: ["server.js"],
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cwd: "/tmp",
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env: process.env,
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supervisor: supervisor as any,
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label: "web",
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});
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proc.emit("exit", 2, null);
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await Promise.resolve();
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await Promise.resolve();
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expect(supervisor.shutdown).toHaveBeenCalledWith("web exit");
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expect(consoleErrorSpy).toHaveBeenCalledWith("[kandev] web exited (code=2, signal=null)");
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});
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});
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