support_backend/tests/integration/knowledge-entries.test.ts

import { describe, it, expect, beforeAll, afterAll } from 'vitest';
import { buildApp } from '@/app';
import { prismaClient } from '@/infrastructure/database';
import { FastifyInstance } from 'fastify';

/** Covers specs/004-product-knowledge/quickstart.md Scenarios 1, 2, 3 against a real Postgres. */
describe('Knowledge entry authoring, publishing, and versioning', () => {
  let app: FastifyInstance;
  const externalProductId = `TEST_KNOWLEDGE_PROD_${Date.now()}`;
  const code = `KB-TEST-${Date.now()}`;

  beforeAll(async () => {
    app = await buildApp();
    await prismaClient.product.create({
      data: { externalProductId, name: 'Knowledge Test Product', status: 'active' },
    });
  });

  afterAll(async () => {
    await prismaClient.knowledgeEntry.deleteMany({ where: { code } });
    await prismaClient.product.deleteMany({ where: { externalProductId } });
    await app.close();
  });

  it('Scenario 1: a draft is invisible to retrieval, publishing makes it retrievable', async () => {
    const createResponse = await app.inject({
      method: 'POST',
      url: `/admin/products/${externalProductId}/knowledge`,
      payload: { code, type: 'known_issue', problem: 'PDF conversion fails' },
    });
    expect(createResponse.statusCode).toBe(201);
    expect(createResponse.json().data.status).toBe('draft');

    const beforePublish = await app.inject({
      method: 'GET',
      url: `/knowledge/retrieve?productId=${externalProductId}`,
    });
    expect(
      beforePublish.json().data.find((e: { code: string }) => e.code === code),
    ).toBeUndefined();

    const publishResponse = await app.inject({
      method: 'PATCH',
      url: `/admin/knowledge/${code}/publish`,
    });
    expect(publishResponse.statusCode).toBe(200);
    expect(publishResponse.json().data.status).toBe('published');

    const afterPublish = await app.inject({
      method: 'GET',
      url: `/knowledge/retrieve?productId=${externalProductId}`,
    });
    expect(afterPublish.json().data.find((e: { code: string }) => e.code === code)).toBeDefined();
  });

  it('Scenario 2: editing creates a new version and preserves the prior one', async () => {
    const editResponse = await app.inject({
      method: 'PUT',
      url: `/admin/knowledge/${code}`,
      payload: {
        type: 'known_issue',
        problem: 'PDF conversion fails — updated',
        expectedVersion: 1,
      },
    });
    expect(editResponse.statusCode).toBe(200);
    expect(editResponse.json().data.version).toBe(2);

    const versionsResponse = await app.inject({
      method: 'GET',
      url: `/admin/knowledge/${code}/versions`,
    });
    const versions = versionsResponse.json().data;
    expect(versions).toHaveLength(2);
    const v1 = versions.find((v: { version: number }) => v.version === 1);
    const v2 = versions.find((v: { version: number }) => v.version === 2);
    expect(v1.problem).toBe('PDF conversion fails');
    expect(v2.problem).toBe('PDF conversion fails — updated');
    expect(v2.isCurrentVersion).toBe(true);
    expect(v1.isCurrentVersion).toBe(false);

    const retrieveResponse = await app.inject({
      method: 'GET',
      url: `/knowledge/retrieve?productId=${externalProductId}`,
    });
    const retrieved = retrieveResponse.json().data.find((e: { code: string }) => e.code === code);
    expect(retrieved.problem).toBe('PDF conversion fails — updated');
  });

  it('Scenario 3: a stale-version edit is rejected, not silently applied', async () => {
    const first = await app.inject({
      method: 'PUT',
      url: `/admin/knowledge/${code}`,
      payload: { type: 'known_issue', problem: 'edit A', expectedVersion: 2 },
    });
    const second = await app.inject({
      method: 'PUT',
      url: `/admin/knowledge/${code}`,
      payload: { type: 'known_issue', problem: 'edit B', expectedVersion: 2 },
    });

    const results = [first.statusCode, second.statusCode].sort();
    expect(results).toEqual([200, 409]);
  });

  it('marking an entry validated is reflected on retrieval results', async () => {
    const response = await app.inject({
      method: 'PATCH',
      url: `/admin/knowledge/${code}/validate`,
      payload: { validationStatus: 'validated' },
    });
    expect(response.statusCode).toBe(200);
    expect(response.json().data.validationStatus).toBe('validated');
  });

  it('unpublishing removes the entry from retrieval without deleting it', async () => {
    await app.inject({ method: 'PATCH', url: `/admin/knowledge/${code}/unpublish` });

    const retrieveResponse = await app.inject({
      method: 'GET',
      url: `/knowledge/retrieve?productId=${externalProductId}`,
    });
    expect(
      retrieveResponse.json().data.find((e: { code: string }) => e.code === code),
    ).toBeUndefined();

    const versionsResponse = await app.inject({
      method: 'GET',
      url: `/admin/knowledge/${code}/versions`,
    });
    expect(versionsResponse.statusCode).toBe(200);
  });
});