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# Licensed under the GPL: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
# For details: https://github.com/PyCQA/pylint/blob/main/LICENSE
# Copyright (c) https://github.com/PyCQA/pylint/blob/main/CONTRIBUTORS.txt
"""Unit tests for the imports checker."""
import os
import astroid
from pytest import CaptureFixture
from pylint.checkers import imports
from pylint.interfaces import UNDEFINED
from pylint.lint import Run
from pylint.testutils import CheckerTestCase, MessageTest
REGR_DATA = os.path.join(os.path.dirname(__file__), "..", "regrtest_data", "")
class TestImportsChecker(CheckerTestCase):
CHECKER_CLASS = imports.ImportsChecker
def test_relative_beyond_top_level(self) -> None:
module = astroid.MANAGER.ast_from_module_name("beyond_top", REGR_DATA)
import_from = module.body[0]
msg = MessageTest(
msg_id="relative-beyond-top-level",
node=import_from,
line=1,
col_offset=0,
end_line=1,
end_col_offset=25,
)
with self.assertAddsMessages(msg):
self.checker.visit_importfrom(import_from)
with self.assertNoMessages():
self.checker.visit_importfrom(module.body[1])
with self.assertNoMessages():
self.checker.visit_importfrom(module.body[2].body[0])
@staticmethod
def test_relative_beyond_top_level_two(capsys: CaptureFixture[str]) -> None:
Run(
[
f"{os.path.join(REGR_DATA, 'beyond_top_two')}",
"-d all",
"-e relative-beyond-top-level",
],
exit=False,
)
output, errors = capsys.readouterr()
top_level_function = os.path.join(
REGR_DATA, "beyond_top_two/namespace_package/top_level_function.py"
)
Run(
[top_level_function, "-d all", "-e relative-beyond-top-level"],
exit=False,
)
output2, errors2 = capsys.readouterr()
assert len(output.split("\n")) == 5
assert len(output2.split("\n")) == 5
assert errors == errors2
@staticmethod
def test_relative_beyond_top_level_three(capsys: CaptureFixture[str]) -> None:
Run(
[
f"{os.path.join(REGR_DATA, 'beyond_top_three/a.py')}",
"-d all",
"-e relative-beyond-top-level",
],
exit=False,
)
output, errors = capsys.readouterr()
assert len(output.split("\n")) == 5
assert errors == ""
@staticmethod
def test_relative_beyond_top_level_four(capsys: CaptureFixture[str]) -> None:
Run(
[
f"{os.path.join(REGR_DATA, 'beyond_top_four/module')}",
"-d missing-docstring,unused-import",
],
exit=False,
)
output, errors = capsys.readouterr()
assert len(output.split("\n")) == 5
assert errors == ""
def test_wildcard_import_init(self) -> None:
module = astroid.MANAGER.ast_from_module_name("init_wildcard", REGR_DATA)
import_from = module.body[0]
with self.assertNoMessages():
self.checker.visit_importfrom(import_from)
def test_wildcard_import_non_init(self) -> None:
module = astroid.MANAGER.ast_from_module_name("wildcard", REGR_DATA)
import_from = module.body[0]
msg = MessageTest(
msg_id="wildcard-import",
node=import_from,
args="empty",
confidence=UNDEFINED,
line=1,
col_offset=0,
end_line=1,
end_col_offset=19,
)
with self.assertAddsMessages(msg):
self.checker.visit_importfrom(import_from)
@staticmethod
def test_preferred_module(capsys: CaptureFixture[str]) -> None:
"""
Tests preferred-module configuration option
"""
# test preferred-modules case with base module import
Run(
[
f"{os.path.join(REGR_DATA, 'preferred_module')}",
"-d all",
"-e preferred-module",
# prefer sys instead of os (for triggering test)
"--preferred-modules=os:sys",
],
exit=False,
)
output, errors = capsys.readouterr()
# assert that we saw preferred-modules triggered
assert "Prefer importing 'sys' instead of 'os'" in output
# assert there were no errors
assert len(errors) == 0
@staticmethod
def test_allow_reexport_package(capsys: CaptureFixture[str]) -> None:
"""Test --allow-reexport-from-package option."""
# Option disabled - useless-import-alias should always be emitted
Run(
[
f"{os.path.join(REGR_DATA, 'allow_reexport')}",
"--allow-reexport-from-package=no",
"-sn",
],
exit=False,
)
output, errors = capsys.readouterr()
assert len(output.split("\n")) == 5, f"Expected 5 line breaks in:{output}"
assert (
"__init__.py:1:0: C0414: Import alias does not rename original package (useless-import-alias)"
in output
)
assert (
"file.py:2:0: C0414: Import alias does not rename original package (useless-import-alias)"
in output
)
assert len(errors) == 0
# Option enabled - useless-import-alias should only be emitted for 'file.py'
Run(
[
f"{os.path.join(REGR_DATA, 'allow_reexport')}",
"--allow-reexport-from-package=yes",
"-sn",
],
exit=False,
)
output, errors = capsys.readouterr()
assert len(output.split("\n")) == 3
assert "__init__.py" not in output
assert (
"file.py:2:0: C0414: Import alias does not rename original package (useless-import-alias)"
in output
)
assert len(errors) == 0
|
