text: # Licensed under the Apache License: http://www.apache.org/licenses/LICENSE-2.0
  # For details: https://github.com/nedbat/coveragepy/blob/master/NOTICE.txt
  
  """Tests of code in tests/mixins.py"""
  
  import pytest
  
  from coverage.misc import import_local_file
  
  from tests.mixins import TempDirMixin, RestoreModulesMixin
  
  
  class TempDirMixinTest(TempDirMixin):
      """Test the methods in TempDirMixin."""
  
      def file_text(self, fname):
          """Return the text read from a file."""
          with open(fname, "rb") as f:
              return f.read().decode('ascii')
  
      def test_make_file(self):
          # A simple file.
          self.make_file("fooey.boo", "Hello there")
          assert self.file_text("fooey.boo") == "Hello there"
          # A file in a sub-directory
          self.make_file("sub/another.txt", "Another")
          assert self.file_text("sub/another.txt") == "Another"
          # A second file in that sub-directory
          self.make_file("sub/second.txt", "Second")
          assert self.file_text("sub/second.txt") == "Second"
          # A deeper directory
          self.make_file("sub/deeper/evenmore/third.txt")
          assert self.file_text("sub/deeper/evenmore/third.txt") == ""
          # Dedenting
          self.make_file("dedented.txt", """\
              Hello
              Bye
              """)
          assert self.file_text("dedented.txt") == "Hello\nBye\n"
  
      def test_make_file_newline(self):
          self.make_file("unix.txt", "Hello\n")
          assert self.file_text("unix.txt") == "Hello\n"
          self.make_file("dos.txt", "Hello\n", newline="\r\n")
          assert self.file_text("dos.txt") == "Hello\r\n"
          self.make_file("mac.txt", "Hello\n", newline="\r")
          assert self.file_text("mac.txt") == "Hello\r"
  
      def test_make_file_non_ascii(self):
          self.make_file("unicode.txt", "tablo: «ταБℓσ»")
          with open("unicode.txt", "rb") as f:
              text = f.read()
          assert text == b"tablo: \xc2\xab\xcf\x84\xce\xb1\xd0\x91\xe2\x84\x93\xcf\x83\xc2\xbb"
  
      def test_make_bytes_file(self):
          self.make_file("binary.dat", bytes=b"\x99\x33\x66hello\0")
          with open("binary.dat", "rb") as f:
              data = f.read()
          assert data == b"\x99\x33\x66hello\0"
  
  
  class RestoreModulessMixinTest(TempDirMixin, RestoreModulesMixin):
      """Tests of SysPathModulesMixin."""
  
      @pytest.mark.parametrize("val", [17, 42])
      def test_module_independence(self, val):
          self.make_file("xyzzy.py", f"A = {val}")
          import xyzzy            # pylint: disable=import-error
          assert xyzzy.A == val
  
      def test_cleanup_and_reimport(self):
          self.make_file("xyzzy.py", "A = 17")
          xyzzy = import_local_file("xyzzy")
          assert xyzzy.A == 17
  
          self.clean_local_file_imports()
  
          self.make_file("xyzzy.py", "A = 42")
          xyzzy = import_local_file("xyzzy")
          assert xyzzy.A == 42
  