old_contents: """Check REDIRECTIONS"""
  
  import io
  import os
  
  import pytest
  
  import nikola.plugins.command.init
  from nikola import __main__
  
  from .helper import append_config, cd
  from .test_demo_build import prepare_demo_site
  from .test_empty_build import (  # NOQA
      test_archive_exists,
      test_avoid_double_slash_in_rss,
      test_check_files,
      test_check_links,
      test_index_in_sitemap,
  )
  
  
  @pytest.fixture(scope="module")
  def build(target_dir):
      """Fill the site with demo content and build it."""
      prepare_demo_site(target_dir)
  
      nikola.utils.makedirs(os.path.join(target_dir, "files", "foo"))
  
      target_path = os.path.join(target_dir, "files", "foo", "bar.html")
      with io.open(target_path, "w+", encoding="utf8") as outf:
          outf.write("foo")
  
      append_config(
          target_dir,
          """
  REDIRECTIONS = [ ("posts/foo.html", "/foo/bar.html"), ]
  """,
      )
  
      with cd(target_dir):
          __main__.main(["build"])
  
new_contents: """Check REDIRECTIONS"""
  
  import io
  import os
  
  import pytest
  
  import nikola.plugins.command.init
  from nikola import __main__
  
  from .helper import append_config, cd
  from .test_demo_build import prepare_demo_site
  from .test_empty_build import (  # NOQA
      test_archive_exists,
      test_avoid_double_slash_in_rss,
      test_check_files,
      test_check_links,
      test_index_in_sitemap,
  )
  
  
  @pytest.fixture(scope="module")
  def build(target_dir):
      """Fill the site with demo content and build it."""
      prepare_demo_site(target_dir)
  
      redirects_dir = os.path.join(target_dir, "files", "redirects")
      nikola.utils.makedirs(redirects_dir)
  
      target_path = os.path.join(redirects_dir, "absolute_source.html")
      with io.open(target_path, "w+", encoding="utf8") as outf:
          outf.write("absolute")
  
      append_config(
          target_dir,
          """
  REDIRECTIONS = [ ("posts/absolute.html", "/redirects/absolute_source.html"), ]
  """,
      )
  
      with cd(target_dir):
          __main__.main(["build"])
  
subject: Refactor tests in preparation of the merge of redirect tests.