if (fritools::get_run_r_tests()) {
    library(testthat)
    if (interactive()) {
        pkgload::load_all()
    } else {
        library("document")
    }
    glbt <- fritools::get_lines_between_tags

    context("file parsing")
    test_that("simple", {
                  path <- system.file("files", "simple.R",
                                      package = "document")
                  current <- glbt(path, keep_tagged_lines = TRUE)
                  reference <- readLines(system.file("expected_files",
                                                     "simple.R",
                                                     package = "document"))
                  expect_equal(current, reference)
}
    )
    test_that("foobar", {
                  path <- system.file("files", "foobar.R",
                                      package = "document")
                  current <- glbt(path)
                  reference <- readLines(system.file("expected_files",
                                                     "foobar.R",
                                                     package = "document"))
                  expect_equal(current, reference)
    }
    )
    test_that("foobar no tagged lines", {
                  path <- system.file("files", "foobar.R",
                                      package = "document")
                  current <- glbt(path, keep_tagged_lines = FALSE)
                  reference <- readLines(system.file("expected_files",
                                                     "foobar_nl.R",
                                                     package = "document"))
                  expect_equal(current, reference)
    }
    )
    test_that("foo", {
                  path <- system.file("files", "foo.R",
                                      package = "document")
                  current <- glbt(path)
                  reference <- readLines(system.file("expected_files",
                                                     "foo.R",
                                                     package = "document"))
                  expect_equal(current, reference)
    }
    )
    test_that("foo no tagged lines", {
                  path <- system.file("files", "foo.R",
                                      package = "document")
                  current <- glbt(path, keep_tagged_lines = FALSE)
                  reference <- readLines(system.file("expected_files",
                                                     "foo_nl.R",
                                                     package = "document"))
                  expect_equal(current, reference)
    }
    )
    test_that("bar", {
                  path <- system.file("files", "bar.R",
                                      package = "document")
                  current <- glbt(path)
                  reference <- readLines(system.file("expected_files",
                                                     "bar.R",
                                                     package = "document"))
                  expect_equal(current, reference)
    }
    )
    test_that("bar no tagged lines", {
                  path <- system.file("files", "bar.R",
                                      package = "document")
                  current <- glbt(path, keep_tagged_lines = FALSE)
                  reference <- readLines(system.file("expected_files",
                                                     "bar_nl.R",
                                                     package = "document"))
                  expect_equal(current, reference)
    }
    )
    test_that("no tagged lines", {
                  path <- system.file("files", "minimal.R",
                                      package = "document")
                  current <- glbt(path, keep_tagged_lines = FALSE)
                  expect_equal(current, readLines(path))
    }
    )
    test_that("no tagged lines, not_from", {
                  path <- system.file("files", "minimal.R",
                                      package = "document")
                  current <- glbt(path, from_first_line = FALSE)
                  expect_equal(current, NULL)
    }
    )
}