orca/src/relay/git-handler-blob-readers.test.ts

import { describe, expect, it, vi } from 'vitest'
import { readBlobAtIndex, readBlobAtOid, type GitBufferExec } from './git-handler-ops'

describe('git blob readers', () => {
  it('normalizes Windows separators before reading OID blobs', async () => {
    const gitBuffer = vi.fn<GitBufferExec>().mockResolvedValue(Buffer.from('head-content'))

    const result = await readBlobAtOid(gitBuffer, '/repo', 'HEAD', 'src\\file.ts')

    expect(gitBuffer).toHaveBeenCalledWith(
      ['show', '--end-of-options', 'HEAD:src/file.ts'],
      '/repo'
    )
    expect(result.content).toBe('head-content')
  })

  it('marks OID blobs that overflow maxBuffer as binary', async () => {
    const gitBuffer = vi
      .fn<GitBufferExec>()
      .mockRejectedValue(
        Object.assign(new Error('stdout maxBuffer length exceeded'), { code: 'ENOBUFS' })
      )

    const result = await readBlobAtOid(gitBuffer, '/repo', 'HEAD', 'large.log')

    expect(result).toEqual({ content: '', isBinary: true })
  })

  it('normalizes Windows separators before reading index blobs', async () => {
    const gitBuffer = vi.fn<GitBufferExec>().mockResolvedValue(Buffer.from('index-content'))

    const result = await readBlobAtIndex(gitBuffer, '/repo', 'src\\file.ts')

    expect(gitBuffer).toHaveBeenCalledWith(['show', '--end-of-options', ':src/file.ts'], '/repo')
    expect(result.content).toBe('index-content')
  })

  it('marks index blobs that overflow maxBuffer as binary', async () => {
    const gitBuffer = vi
      .fn<GitBufferExec>()
      .mockRejectedValue(
        Object.assign(new Error('git stdout exceeded maxBuffer.'), { code: 'ENOBUFS' })
      )

    const result = await readBlobAtIndex(gitBuffer, '/repo', 'large.log')

    // Why: overflow is size-capped content, not a staged deletion (missing: false).
    expect(result).toEqual({ content: '', isBinary: true, missing: false })
  })
})