djavu-asus/emacs/elpa/elpy-20230803.1455/elpy/tests/test_black.py

   1 # coding: utf-8
   2 """Tests for the elpy.black module"""
   3
   4 import unittest
   5 import os
   6
   7 from elpy import blackutil
   8 from elpy.rpc import Fault
   9 from elpy.tests.support import BackendTestCase
  10
  11
  12 @unittest.skipIf(blackutil.BLACK_NOT_SUPPORTED,
  13                  'black not supported for current python version')
  14 class BLACKTestCase(BackendTestCase):
  15     def setUp(self):
  16         if blackutil.BLACK_NOT_SUPPORTED:
  17             raise unittest.SkipTest
  18
  19     def test_fix_code_should_throw_error_for_invalid_code(self):
  20         src = 'x = '
  21         self.assertRaises(Fault, blackutil.fix_code, src, os.getcwd())
  22
  23     def test_fix_code_should_throw_error_without_black_installed(self):
  24         black = blackutil.black
  25         blackutil.black = None
  26         src = 'x=       123\n', 'x = 123\n'
  27         with self.assertRaises(Fault):
  28             blackutil.fix_code(src, os.getcwd())
  29         blackutil.black = black
  30
  31     def test_fix_code(self):
  32         testdata = [
  33             ('x=       123\n', 'x = 123\n'),
  34             ('x=1; \ny=2 \n', 'x = 1\ny = 2\n'),
  35         ]
  36         for src, expected in testdata:
  37             self._assert_format(src, expected)
  38
  39     def test_perfect_code(self):
  40         testdata = [
  41             ('x = 123\n', 'x = 123\n'),
  42             ('x = 1\ny = 2\n', 'x = 1\ny = 2\n'),
  43         ]
  44         for src, expected in testdata:
  45             self._assert_format(src, expected)
  46
  47     def _assert_format(self, src, expected):
  48         new_block = blackutil.fix_code(src, os.getcwd())
  49         self.assertEqual(new_block, expected)
  50
  51     def test_should_read_options_from_pyproject_toml(self):
  52         with open('pyproject.toml', 'w') as f:
  53             f.write('[tool.black]\nline-length = 10')
  54
  55         self.addCleanup(os.remove, 'pyproject.toml')
  56
  57         testdata = [('x=       123\n', 'x = 123\n'),
  58                     ('x=1; \ny=2 \n', 'x = 1\ny = 2\n'),
  59                     ('x, y, z, a, b, c = 123, 124, 125, 126, 127, 128',
  60                      '(\n    x,\n    y,\n    z,\n    a,\n    b,\n    c,\n)'
  61                      ' = (\n    123,\n    124,\n    125,'
  62                      '\n    126,\n    127,\n    128,\n)\n')]
  63         for src, expected in testdata:
  64             self._assert_format(src, expected)