docfast/src/__tests__/email.test.ts

import { describe, it, expect, vi, beforeEach } from "vitest";

vi.unmock("../services/email.js");

const { mockSendMail } = vi.hoisted(() => ({
  mockSendMail: vi.fn(),
}));

vi.mock("nodemailer", () => ({
  default: {
    createTransport: vi.fn(() => ({
      sendMail: mockSendMail,
    })),
  },
}));

vi.mock("../services/logger.js", () => ({
  default: { info: vi.fn(), error: vi.fn(), warn: vi.fn(), debug: vi.fn() },
}));

import { sendVerificationEmail } from "../services/email.js";

describe("Email Service", () => {
  beforeEach(() => {
    vi.clearAllMocks();
  });

  describe("sendVerificationEmail", () => {
    it("constructs correct email with code", async () => {
      mockSendMail.mockResolvedValueOnce({ messageId: "test-123" });
      const result = await sendVerificationEmail("user@example.com", "654321");

      expect(result).toBe(true);
      expect(mockSendMail).toHaveBeenCalledOnce();
      const opts = mockSendMail.mock.calls[0][0];
      expect(opts.to).toBe("user@example.com");
      expect(opts.subject).toContain("Verify");
      expect(opts.text).toContain("654321");
      expect(opts.html).toContain("654321");
    });

    it("returns false when SMTP fails", async () => {
      mockSendMail.mockRejectedValueOnce(new Error("SMTP connection refused"));
      const result = await sendVerificationEmail("user@example.com", "123456");
      expect(result).toBe(false);
    });

    it("includes expiry notice in email body", async () => {
      mockSendMail.mockResolvedValueOnce({ messageId: "test-456" });
      await sendVerificationEmail("user@example.com", "111111");
      const opts = mockSendMail.mock.calls[0][0];
      expect(opts.text).toContain("15 minutes");
    });
  });
});