test_that("bind_chains", {
  expect_identical(nchains(bind_chains(as.mcmc.list(mcmcr_example), as.mcmc.list(mcmcr_example))), 4L)
  expect_identical(nchains(bind_chains(mcmcr_example$beta, mcmcr_example$beta)), 4L)
  expect_identical(nchains(bind_chains(mcmcr_example, mcmcr_example)), 4L)
  expect_identical(nchains(bind_chains(mcmcr_example2, mcmcr_example2)), 4L)
})

test_that("bind_chains.mcarray", {
  expect_identical(nchains(bind_chains(
    as.mcarray(mcmcr_example$beta),
    as.mcarray(mcmcr_example$beta)
  )), 4L)

  expect_error(bind_chains(as.mcarray(mcmcr_example$beta), mcmcr_example),
    "^`x2` must inherit from S3 class 'mcarray'[.]$",
    class = "chk_error"
  )

  expect_error(
    bind_chains(
      as.mcarray(mcmcr_example$beta),
      as.mcarray(mcmcr_example$alpha)
    ),
    "^`x` and `x2` must have the same parameter dimensions[.]$",
    class = "chk_error"
  )
})

test_that("bind_chains.mcmc", {
  expect_identical(nchains(bind_chains(
    as.mcmc(collapse_chains(mcmcr_example)),
    as.mcmc(collapse_chains(mcmcr_example))
  )), 2L)

  expect_error(nchains(bind_chains(
    as.mcmc(collapse_chains(mcmcr_example)),
    mcmcr_example
  )), "^`x2` must inherit from S3 class 'mcmc'[.]$", class = "chk_error")

  expect_error(
    bind_chains(
      as.mcmc(collapse_chains(mcmcr_example$beta)),
      as.mcmc(collapse_chains(mcmcr_example))
    ),
    "^`x` and `x2` must have the same parameters[.]$",
    class = "chk_error"
  )


  expect_error(
    bind_chains(
      as.mcmc(collapse_chains(thin(mcmcr_example, 2L))),
      as.mcmc(collapse_chains(mcmcr_example))
    ),
    "^`x` and `x2` must have the same number of iterations[.]$",
    class = "chk_error"
  )
})