Nothing
      test_that("install_local", {
  skip_on_cran()
  skip_if_offline()
  Sys.unsetenv("R_TESTS")
  lib <- tempfile()
  on.exit(unlink(lib, recursive = TRUE), add = TRUE)
  dir.create(lib)
  dir <- tempfile()
  on.exit(unlink(dir), add = TRUE)
  dir.create(dir)
  repos <- getOption("repos")
  if (length(repos) == 0) repos <- character()
  repos[repos == "@CRAN@"] <- "http://cran.rstudio.com"
  pkg <- download.packages("pkgconfig", dir, repos = repos, type = "source", quiet = TRUE)
  install_local(pkg[, 2], lib = lib, quiet = TRUE)
  expect_silent(packageDescription("pkgconfig", lib.loc = lib))
  expect_equal(
    packageDescription("pkgconfig", lib.loc = lib)$RemoteType,
    "local")
  remote <- package2remote("pkgconfig", lib = lib)
  expect_s3_class(remote, "remote")
  expect_s3_class(remote, "local_remote")
  expect_equal(format(remote), "local")
  expect_equal(remote$path, normalizePath(pkg[, 2]))
  expect_true(!is.na(remote$sha) && nzchar(remote$sha))
})
test_that("local remotes do not fail if the local install no longer exists", {
  skip_on_cran()
  skip_if_offline()
  Sys.unsetenv("R_TESTS")
  lib <- tempfile()
  on.exit(unlink(lib, recursive = TRUE), add = TRUE)
  dir.create(lib)
  dir <- tempfile()
  on.exit(unlink(dir, recursive = TRUE), add = TRUE)
  dir.create(dir)
  repos <- getOption("repos")
  if (length(repos) == 0) repos <- character()
  repos[repos == "@CRAN@"] <- "http://cran.rstudio.com"
  pkg <- download.packages("pkgconfig", dir, repos = repos, type = "source", quiet = TRUE)
  install_local(pkg[, 2], lib = lib, quiet = TRUE)
  unlink(dir, recursive = TRUE)
  withr::with_libpaths(lib,
    expect_error(update_packages(pkg[, 1], lib = lib, upgrade = TRUE, quiet = TRUE), NA)
  )
})
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