test_that("with_mock_dir works when the directory with mock files exists", {
  temporary_dir <- tempfile()
  # The directory exists, so we'll read mocks from it
  dir.create(temporary_dir)
  # Put mocks in it
  file.copy(testthat::test_path("httpbin.not"), temporary_dir, recursive = TRUE)

  current_mock_paths <- .mockPaths()
  with_mock_dir(temporary_dir, {
    # There's nothing on the mock paths other than our mock dir
    expect_identical(.mockPaths(), temporary_dir)
    expect_no_request(resp <- request("http://httpbin.not/status/204") %>% req_perform())
    # We've read from the mock
    expect_equal(resp_headers(resp)$date, "Sat, 24 Feb 2018 00:22:11 GMT")
  })
  # Original mock paths are reset
  expect_true(all.equal(current_mock_paths, .mockPaths()))
})

test_that("with_mock_dir creates mock files directory", {
  temporary_dir <- tempfile()
  current_mock_paths <- .mockPaths()
  with_mock_dir(temporary_dir, {
    # Since the directory doesn't exist, we will create it and capture
    expect_identical(.mockPaths(), temporary_dir)
    expect_false(dir.exists(temporary_dir))

    resp <- request(httpbin$url("/status/204")) %>% req_perform()
    # It recorded the request in temporary_dir
    expect_true(dir.exists(temporary_dir))
  })
  expect_true(all.equal(current_mock_paths, .mockPaths()))
})

test_that("with_mock_dir prefers to be in tests/testthat", {
  d <- tempfile()
  dir.create(file.path(d, "tests", "testthat"), recursive = TRUE)
  old <- setwd(d)
  on.exit(setwd(old))

  with_mock_dir("asdf", {
    expect_identical(.mockPaths(), file.path("tests", "testthat", "asdf"))
  })
  with_mock_dir("/asdf", {
    expect_identical(.mockPaths(), "/asdf")
  })
})