sickn33/agentic-awesome-skills · error · Error

Failed to build deps: ${depsResult.left}

Error message

Failed to build deps: ${depsResult.left}

What it means

Thrown by the integration-test setup example in the fp-backend skill (skills/fp-backend/SKILL.md:1195) when buildDeps()(), an Either/TaskEither-style dependency initializer, returns a Left. It surfaces any startup failure of the application dependency graph (database connection, config parsing, client construction) as a Jest beforeAll error so tests abort fast.

Source

Thrown at skills/fp-backend/SKILL.md:1195

import { pipe } from 'fp-ts/function'
import { describe, it, expect, beforeAll, afterAll } from 'vitest'
import { buildDeps, destroyDeps, AppDeps } from '../../deps'
import * as UserService from '../../services/user.service'

describe('UserService Integration', () => {
  let container: PostgreSqlContainer
  let deps: AppDeps

  beforeAll(async () => {
    // Start PostgreSQL container
    container = await new PostgreSqlContainer().start()

    // Build real dependencies with test database
    process.env.DATABASE_URL = container.getConnectionUri()

    const depsResult = await buildDeps()()
    if (E.isLeft(depsResult)) {
      throw new Error(`Failed to build deps: ${depsResult.left}`)
    }
    deps = depsResult.right

    // Run migrations
    await deps.db.$executeRaw`CREATE EXTENSION IF NOT EXISTS "uuid-ossp"`
    // ... run Prisma migrations
  }, 60000)

  afterAll(async () => {
    await destroyDeps(deps)()
    await container.stop()
  })

  it('should create and retrieve a user', async () => {
    // Create user
    const createResult = await UserService.create({
      email: 'integration@test.com',
      password: 'password123',

View on GitHub (pinned to 58d857988f)

Solutions

1. Log or inspect depsResult.left: it carries the real initialization error; fix that first
2. Verify process.env.DATABASE_URL is set from container.getConnectionUri() before buildDeps()() is invoked
3. Ensure Testcontainers/Docker is running and the PostgreSQL image can start within the 60000ms beforeAll timeout
4. Check all required config values read inside buildDeps are present in the test environment

Example fix

// before
const depsResult = await buildDeps()()
if (E.isLeft(depsResult)) {
  throw new Error(`Failed to build deps: ${depsResult.left}`)
}

// after (surface the structural cause)
if (E.isLeft(depsResult)) {
  throw new Error(`Failed to build deps: ${JSON.stringify(depsResult.left)}`)
}

process.env.DATABASE_URL = container.getConnectionUri()
if (!process.env.DATABASE_URL) throw new Error('DATABASE_URL missing before buildDeps')

try {
  const depsResult = await buildDeps()()
  if (E.isLeft(depsResult)) throw new Error(`Failed to build deps: ${JSON.stringify(depsResult.left)}`)
  deps = depsResult.right
} catch (err) {
  console.error('test setup failed - check Docker and env:', err)
  throw err
}

When it happens

Trigger: Running the documented integration tests when buildDeps fails: wrong or unreachable DATABASE_URL (the just-started PostgreSQL container URI was not picked up), missing required config/env vars, or a Prisma client that cannot instantiate against the container.

Common situations: Env var not propagated before buildDeps runs; Docker/Testcontainers unavailable or slow so the container URI is stale; Prisma engine mismatch; required secrets absent in CI. The interpolated depsResult.left usually contains the underlying cause string.

Related errors

• HTTP ${response.status}
• HTTP ${response.status}: ${response.statusText}
• Order not found
• Not found
• No order

AI-assisted analysis of sickn33/agentic-awesome-skills@58d857988f (2026-08-26). Data as JSON: /api/errors/1e0cdf8b68a36c56. Report an issue: GitHub.