Accessing local D1 database with Vitest integration

[dherran]

I've been following the guide to create a simple integration test with Vitest. The missing bit is the D1 integration, as it seems like the test environment doesn't have access to the local DB binding from wrangler.toml. Here is my setup:

// vitest.config.mts

import { defineWorkersConfig } from "@cloudflare/vitest-pool-workers/config";

export default defineWorkersConfig({
  test: {
    poolOptions: {
      workers: {
        wrangler: { configPath: "./wrangler.toml" },
      },
    },
  }
});

// wrangler.toml

[[d1_databases]]
binding = "DB"
database_name = "my_db"
database_id = "abdcde"

// index.ts

import { Hono, Context } from "hono";

const app = new Hono<{ Bindings: CloudflareBindings }>();

app.get("/api/users/:id", async (c) => {
  const userId = c.req.param("id");
  try {
    let { results } = await c.env.DB.prepare("SELECT * FROM users WHERE id = ?")
      .bind(userId)
      .all();
    return c.json(results);
  } catch (e) {
    console.log(e);
    return c.json({ err: e.message }, 500);
  }
});

export default app;

// test/index.spec.ts

import { env, createExecutionContext, waitOnExecutionContext, SELF } from "cloudflare:test";
import { describe, it, expect } from "vitest";
import worker from "index";

describe("GET /api/users/1", () => {
  it("Should return 200 response", async () => {
    const res = await worker.request("/api/users/1", {}, env);

    expect(res.status).toBe(200);
  });
});

All of this works perfectly fine when running the local worker with npm run dev, but npm test will throw the following error:

Error: D1_ERROR: no such table: users: SQLITE_ERROR

Any ideas as to how to make Vitest access the local D1 database? is this possible? There is a recipe for executing a migration as part of the test, but ideally I'd like to run the integration test with the local db.