Mocking `Effect.Service` with Dependencies in TypeScript's Effect Library

// GitService.ts
import { Effect } from 'effect'
import { Command } from '@effect/platform'
import { NodeContext } from '@effect/platform-node'

export class GitService extends Effect.Service<GitService>()('GitService', {
  effect: Effect.gen(function* () {
    const getCurrentBranch = Effect.fn('getCurrentBranch')(function* () {
      // This uses CommandExecutor under the hood
      return yield* Command.make("git", "branch", "--show-current").pipe(
        Command.string,
        Effect.map(s => s.trim())
      )
    })

    return { getCurrentBranch }
  }),
  dependencies: [NodeContext.layer]
}) {}

// TodoService.ts  
import { Effect } from 'effect'
import { GitService } from './GitService'

export class TodoService extends Effect.Service<TodoService>()('TodoService', {
  effect: Effect.gen(function* () {
    const git = yield* GitService
    
    const createTodo = Effect.fn('createTodo')(function* () {
      const branch = yield* git.getCurrentBranch()
      return `Created todo for branch: ${branch}`
    })

    return { createTodo }
  }),
  dependencies: [GitService.Default]
}) {}