import { NgrokService } from "../ngrok.service";
import { spawn } from "child_process";
import { EventEmitter } from "events";
// Mock child_process
jest.mock("child_process");
describe("NgrokService", () => {
let service: NgrokService;
let mockSpawn: jest.MockedFunction<typeof spawn>;
beforeEach(() => {
service = new NgrokService();
mockSpawn = spawn as jest.MockedFunction<typeof spawn>;
jest.clearAllMocks();
});
describe("isNgrokInstalled (cross-platform detection)", () => {
it("should use 'which' command on Unix-like systems", async () => {
// Save original platform
const originalPlatform = process.platform;
Object.defineProperty(process, "platform", {
value: "darwin", // macOS
configurable: true,
});
// Mock spawn to return success
const mockProcess = new EventEmitter() as any;
mockSpawn.mockReturnValue(mockProcess);
// Start the check (don't await yet)
const promise = (service as any).isNgrokInstalled();
// Simulate successful command
setTimeout(() => mockProcess.emit("close", 0), 10);
const result = await promise;
expect(mockSpawn).toHaveBeenCalledWith("which", ["ngrok"], {
shell: false,
});
expect(result).toBe(true);
// Restore original platform
Object.defineProperty(process, "platform", {
value: originalPlatform,
configurable: true,
});
});
it("should use 'where' command on Windows with shell option", async () => {
// Save original platform
const originalPlatform = process.platform;
Object.defineProperty(process, "platform", {
value: "win32", // Windows
configurable: true,
});
// Mock spawn to return success
const mockProcess = new EventEmitter() as any;
mockSpawn.mockReturnValue(mockProcess);
// Start the check (don't await yet)
const promise = (service as any).isNgrokInstalled();
// Simulate successful command (Windows 'where' returns 0 even with multiple results)
setTimeout(() => mockProcess.emit("close", 0), 10);
const result = await promise;
expect(mockSpawn).toHaveBeenCalledWith("where", ["ngrok"], {
shell: true,
});
expect(result).toBe(true);
// Restore original platform
Object.defineProperty(process, "platform", {
value: originalPlatform,
configurable: true,
});
});
it("should return false when ngrok is not found (Unix)", async () => {
const originalPlatform = process.platform;
Object.defineProperty(process, "platform", {
value: "linux",
configurable: true,
});
const mockProcess = new EventEmitter() as any;
mockSpawn.mockReturnValue(mockProcess);
const promise = (service as any).isNgrokInstalled();
// Simulate command not found (exit code 1)
setTimeout(() => mockProcess.emit("close", 1), 10);
const result = await promise;
expect(result).toBe(false);
Object.defineProperty(process, "platform", {
value: originalPlatform,
configurable: true,
});
});
it("should return false when ngrok is not found (Windows)", async () => {
const originalPlatform = process.platform;
Object.defineProperty(process, "platform", {
value: "win32",
configurable: true,
});
const mockProcess = new EventEmitter() as any;
mockSpawn.mockReturnValue(mockProcess);
const promise = (service as any).isNgrokInstalled();
// Simulate command not found (exit code 1)
setTimeout(() => mockProcess.emit("close", 1), 10);
const result = await promise;
expect(result).toBe(false);
Object.defineProperty(process, "platform", {
value: originalPlatform,
configurable: true,
});
});
it("should handle spawn errors gracefully", async () => {
const originalPlatform = process.platform;
Object.defineProperty(process, "platform", {
value: "darwin",
configurable: true,
});
const mockProcess = new EventEmitter() as any;
mockSpawn.mockReturnValue(mockProcess);
const promise = (service as any).isNgrokInstalled();
// Simulate spawn error
setTimeout(
() => mockProcess.emit("error", new Error("Spawn failed")),
10,
);
const result = await promise;
expect(result).toBe(false);
Object.defineProperty(process, "platform", {
value: originalPlatform,
configurable: true,
});
});
});
describe("Windows-specific behavior", () => {
it("should handle Windows 'where' command returning multiple paths", async () => {
// This test verifies that even if 'where' returns multiple paths
// (as seen in the user's case with MSIX + npm installations),
// we still correctly detect ngrok as installed (exit code 0)
const originalPlatform = process.platform;
Object.defineProperty(process, "platform", {
value: "win32",
configurable: true,
});
const mockProcess = new EventEmitter() as any;
mockSpawn.mockReturnValue(mockProcess);
const promise = (service as any).isNgrokInstalled();
// Windows 'where' returns exit code 0 even with multiple results
setTimeout(() => mockProcess.emit("close", 0), 10);
const result = await promise;
expect(result).toBe(true);
expect(mockSpawn).toHaveBeenCalledWith("where", ["ngrok"], {
shell: true,
});
Object.defineProperty(process, "platform", {
value: originalPlatform,
configurable: true,
});
});
});
});
