#require test-repo

  $ . "$TESTDIR/helpers-testrepo.sh"

  $ testrepohgenv

  $ import_checker="$TESTDIR"/../contrib/import-checker.py

Run the doctests from the import checker, and make sure

it's working correctly.

  $ TERM=dumb

  $ export TERM

  $ "$PYTHON" -m doctest $import_checker

Run additional tests for the import checker

  $ mkdir testpackage

  $ touch testpackage/__init__.py

  $ cat > testpackage/multiple.py << EOF

  > from __future__ import absolute_import

  > import os, sys

  > EOF

  $ cat > testpackage/unsorted.py << EOF

  > from __future__ import absolute_import

  > import sys

  > import os

  > EOF

  $ cat > testpackage/stdafterlocal.py << EOF

  > from __future__ import absolute_import

  > from . import unsorted

  > import os

  > EOF

  $ cat > testpackage/requirerelative.py << EOF

  > from __future__ import absolute_import

  > import testpackage.unsorted

  > EOF

  $ cat > testpackage/importalias.py << EOF

  > from __future__ import absolute_import

  > import ui

  > EOF

  $ cat > testpackage/relativestdlib.py << EOF

  > from __future__ import absolute_import

  > from .. import os

  > EOF

  $ cat > testpackage/stdlibfrom.py << EOF

  > from __future__ import absolute_import

  > from collections import abc

  > EOF

  $ cat > testpackage/symbolimport.py << EOF

  > from __future__ import absolute_import

  > from .unsorted import foo

  > EOF

  $ cat > testpackage/latesymbolimport.py << EOF

  > from __future__ import absolute_import

  > from . import unsorted

  > from mercurial.node import hex

  > EOF

  $ cat > testpackage/multiplegroups.py << EOF

  > from __future__ import absolute_import

  > from . import unsorted

  > from . import more

  > EOF

  $ mkdir testpackage/subpackage

  $ cat > testpackage/subpackage/levelpriority.py << EOF

  > from __future__ import absolute_import

  > from . import foo

  > from .. import parent

  > EOF

  $ touch testpackage/subpackage/foo.py

  $ cat > testpackage/subpackage/__init__.py << EOF

  > from __future__ import absolute_import

  > from . import levelpriority  # should not cause cycle

  > EOF

  $ cat > testpackage/subpackage/localimport.py << EOF

  > from __future__ import absolute_import

  > from . import foo

  > def bar():

  >     # should not cause "higher-level import should come first"

  >     from .. import unsorted

  >     # but other errors should be detected

  >     from .. import more

  >     import testpackage.subpackage.levelpriority

  > EOF

  $ cat > testpackage/importmodulefromsub.py << EOF

  > from __future__ import absolute_import

  > from .subpackage import foo  # not a "direct symbol import"

  > EOF

  $ cat > testpackage/importsymbolfromsub.py << EOF

  > from __future__ import absolute_import

  > from .subpackage import foo, nonmodule

  > EOF

  $ cat > testpackage/sortedentries.py << EOF

  > from __future__ import absolute_import

  > from . import (

  >     foo,

  >     bar,

  > )

  > EOF

  $ cat > testpackage/importfromalias.py << EOF

  > from __future__ import absolute_import

  > from . import ui

  > EOF

  $ cat > testpackage/importfromrelative.py << EOF

  > from __future__ import absolute_import

  > from testpackage.unsorted import foo

  > EOF

  $ mkdir testpackage2

  $ touch testpackage2/__init__.py

  $ cat > testpackage2/latesymbolimport.py << EOF

  > from __future__ import absolute_import

  > from testpackage import unsorted

  > from mercurial.node import hex

  > EOF

# Shadowing a stdlib module to test "relative import of stdlib module" is

# allowed if the module is also being checked

  $ mkdir email

  $ touch email/__init__.py

  $ touch email/errors.py

  $ cat > email/utils.py << EOF

  > from __future__ import absolute_import

  > from . import errors

  > EOF

  $ "$PYTHON" "$import_checker" testpackage*/*.py testpackage/subpackage/*.py \

  >   email/*.py

  testpackage/importalias.py:2: ui module must be "as" aliased to uimod

  testpackage/importfromalias.py:2: ui from testpackage must be "as" aliased to uimod

  testpackage/importfromrelative.py:2: import should be relative: testpackage.unsorted

  testpackage/importfromrelative.py:2: direct symbol import foo from testpackage.unsorted

  testpackage/importsymbolfromsub.py:2: direct symbol import nonmodule from testpackage.subpackage

  testpackage/latesymbolimport.py:3: symbol import follows non-symbol import: mercurial.node

  testpackage/multiple.py:2: multiple imported names: os, sys

  testpackage/multiplegroups.py:3: multiple "from . import" statements

  testpackage/relativestdlib.py:2: relative import of stdlib module

  testpackage/requirerelative.py:2: import should be relative: testpackage.unsorted

  testpackage/sortedentries.py:2: imports from testpackage not lexically sorted: bar < foo

  testpackage/stdafterlocal.py:3: stdlib import "os" follows local import: testpackage

  testpackage/stdlibfrom.py:2: direct symbol import abc from collections

  testpackage/subpackage/levelpriority.py:3: higher-level import should come first: testpackage

  testpackage/subpackage/localimport.py:7: multiple "from .. import" statements

  testpackage/subpackage/localimport.py:8: import should be relative: testpackage.subpackage.levelpriority

  testpackage/symbolimport.py:2: direct symbol import foo from testpackage.unsorted

  testpackage/unsorted.py:3: imports not lexically sorted: os < sys

  testpackage2/latesymbolimport.py:3: symbol import follows non-symbol import: mercurial.node

  [1]