support_backend/tests/integration/ticket-attachments.test.ts

import { describe, it, expect, beforeAll, afterAll } from 'vitest';
import { buildApp } from '@/app';
import { prismaClient } from '@/infrastructure/database';
import { FastifyInstance } from 'fastify';
import {
  encryptCredential,
  generateCredentialSecret,
  issueIntegrationToken,
} from '@/modules/catalog/products';
import { malwareScanner } from '@/modules/ticketing/attachments';

/** Covers specs/003-ticketing/quickstart.md Scenario 5 against a real Postgres/Redis/MinIO. */
describe('Ticket attachments — upload, confirm, scan-gated download', () => {
  let app: FastifyInstance;
  let ticketId: string;
  const externalProductId = `TEST_ATT_PROD_${Date.now()}`;

  beforeAll(async () => {
    app = await buildApp();

    const product = await prismaClient.product.create({
      data: { externalProductId, name: 'Attachments Test Product', status: 'active' },
    });
    const secret = generateCredentialSecret();
    await prismaClient.productIntegration.create({
      data: {
        productId: product.id,
        credentialRef: encryptCredential(secret),
        authMechanism: 'signed_token',
        allowedScope: { tenantIds: ['tenant-1'] },
        status: 'active',
        rateLimitPerMinute: 1000,
        rateLimitPerUserPerMinute: 1000,
      },
    });

    const token = issueIntegrationToken(secret, {
      externalProductId,
      tenantId: 'tenant-1',
      userId: 'user-1',
    });
    const created = await app.inject({
      method: 'POST',
      url: '/v1/support/requests',
      headers: { authorization: `Bearer ${token}` },
      payload: {
        productId: externalProductId,
        tenantId: 'tenant-1',
        userId: 'user-1',
        source: 'test',
        problem: 'attachment pipeline check',
      },
    });
    ticketId = created.json().data.ticketId;
  });

  afterAll(async () => {
    await prismaClient.ticketAttachment.deleteMany({ where: { ticketId } });
    await prismaClient.ticketMessage.deleteMany({ where: { ticketId } });
    await prismaClient.ticket.deleteMany({ where: { product: { externalProductId } } });
    await prismaClient.problem.deleteMany({ where: { product: { externalProductId } } });
    await prismaClient.productIntegration.deleteMany({
      where: { product: { externalProductId } },
    });
    await prismaClient.product.deleteMany({ where: { externalProductId } });
    await app.close();
  });

  it('rejects an oversized upload before it ever reaches object storage', async () => {
    const response = await app.inject({
      method: 'POST',
      url: `/tickets/${ticketId}/attachments/upload-url`,
      payload: { fileName: 'huge.pdf', mimeType: 'application/pdf', sizeBytes: 999_999_999 },
    });
    expect(response.statusCode).toBe(400);
  });

  it('rejects a disallowed mime type', async () => {
    const response = await app.inject({
      method: 'POST',
      url: `/tickets/${ticketId}/attachments/upload-url`,
      payload: { fileName: 'evil.exe', mimeType: 'application/x-msdownload', sizeBytes: 100 },
    });
    expect(response.statusCode).toBe(400);
  });

  it('an uploaded attachment is refused for download while pending, and stays refused after the placeholder scanner marks it infected', async () => {
    const uploadUrlResponse = await app.inject({
      method: 'POST',
      url: `/tickets/${ticketId}/attachments/upload-url`,
      payload: { fileName: 'screenshot.png', mimeType: 'image/png', sizeBytes: 1024 },
    });
    expect(uploadUrlResponse.statusCode).toBe(200);
    const { uploadUrl, storageKey } = uploadUrlResponse.json().data;

    const putResponse = await fetch(uploadUrl, {
      method: 'PUT',
      headers: { 'Content-Type': 'image/png' },
      body: Buffer.from('fake-png-bytes'),
    });
    expect(putResponse.ok).toBe(true);

    const confirmResponse = await app.inject({
      method: 'POST',
      url: `/tickets/${ticketId}/attachments/confirm`,
      payload: { storageKey, fileName: 'screenshot.png', mimeType: 'image/png', sizeBytes: 1024 },
    });
    expect(confirmResponse.statusCode).toBe(201);
    const attachmentId = confirmResponse.json().data.id;
    expect(confirmResponse.json().data.scanStatus).toBe('pending');

    const downloadWhilePending = await app.inject({
      method: 'GET',
      url: `/tickets/${ticketId}/attachments/${attachmentId}/download-url`,
    });
    expect(downloadWhilePending.statusCode).toBe(409);

    // Run the scan job inline (no worker process in this test) — same call the queue worker
    // makes, per src/jobs/attachments/index.ts.
    const result = await malwareScanner.scan(storageKey);
    await prismaClient.ticketAttachment.update({
      where: { id: attachmentId },
      data: { scanStatus: result },
    });

    const downloadAfterScan = await app.inject({
      method: 'GET',
      url: `/tickets/${ticketId}/attachments/${attachmentId}/download-url`,
    });
    // The placeholder scanner fails closed (always 'infected'), so this remains refused —
    // proving the pipeline actually gates on a real scan result rather than defaulting open.
    expect(downloadAfterScan.statusCode).toBe(409);

    const attachment = await prismaClient.ticketAttachment.findUniqueOrThrow({
      where: { id: attachmentId },
    });
    expect(attachment.scanStatus).toBe('infected');
  });

  it('a clean attachment produces a working, time-limited download URL', async () => {
    const uploadUrlResponse = await app.inject({
      method: 'POST',
      url: `/tickets/${ticketId}/attachments/upload-url`,
      payload: { fileName: 'clean.pdf', mimeType: 'application/pdf', sizeBytes: 2048 },
    });
    const { uploadUrl, storageKey } = uploadUrlResponse.json().data;
    await fetch(uploadUrl, {
      method: 'PUT',
      headers: { 'Content-Type': 'application/pdf' },
      body: Buffer.from('fake-pdf-bytes'),
    });

    const confirmResponse = await app.inject({
      method: 'POST',
      url: `/tickets/${ticketId}/attachments/confirm`,
      payload: { storageKey, fileName: 'clean.pdf', mimeType: 'application/pdf', sizeBytes: 2048 },
    });
    const attachmentId = confirmResponse.json().data.id;

    // Simulate a real scanner reporting clean, bypassing the fail-closed placeholder directly
    // at the repository layer — this test's job is to prove the DOWNLOAD gate respects
    // scanStatus, not to re-test the placeholder scanner itself (covered by
    // tests/unit/ticketing/malware-scanner.test.ts).
    await prismaClient.ticketAttachment.update({
      where: { id: attachmentId },
      data: { scanStatus: 'clean' },
    });

    const downloadResponse = await app.inject({
      method: 'GET',
      url: `/tickets/${ticketId}/attachments/${attachmentId}/download-url`,
    });
    expect(downloadResponse.statusCode).toBe(200);
    const { downloadUrl } = downloadResponse.json().data;
    expect(downloadUrl).toContain(storageKey);

    const fetched = await fetch(downloadUrl);
    expect(fetched.ok).toBe(true);
    const body = await fetched.text();
    expect(body).toBe('fake-pdf-bytes');
  });
});