// SPDX-FileCopyrightText: © 2026 LEDGER SAS
// SPDX-License-Identifier: Apache-2.0

import { Networks, Transaction as StellarSdkTransaction } from '@stellar/stellar-sdk'
import { combine } from '../combine'

jest.mock('@stellar/stellar-sdk', () => ({
  Networks: {
    PUBLIC: 'PUBLIC',
  },
  Transaction: jest.fn().mockImplementation(() => ({
    addSignature: jest.fn(),
    toXDR: jest.fn().mockReturnValue('signed-xdr'),
  })),
}))

describe('combine', () => {
  it('throws when more than one signature is provided', () => {
    expect(() => combine('unsigned-xdr', ['sig0', 'sig1'], 'public-key')).toThrow(
      'Stellar combine expects exactly one signature, got 2'
    )
  })

  it('creates a transaction, adds signature and returns xdr', () => {
    const result = combine('unsigned-xdr', ['signature'], 'public-key')

    expect(StellarSdkTransaction).toHaveBeenCalledWith('unsigned-xdr', Networks.PUBLIC)

    const txInstance = jest.mocked(StellarSdkTransaction).mock.results[0].value
    expect(txInstance.addSignature).toHaveBeenCalledWith('public-key', 'signature')
    expect(result).toBe('signed-xdr')
  })
})