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1 from trac.versioncontrol import diff
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2
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3 import unittest
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4
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5
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6 class DiffTestCase(unittest.TestCase):
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7
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8 def test_get_change_extent(self):
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9 self.assertEqual((3, 0), diff._get_change_extent('xxx', 'xxx'))
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10 self.assertEqual((0, 0), diff._get_change_extent('', 'xxx'))
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11 self.assertEqual((0, 0), diff._get_change_extent('xxx', ''))
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12 self.assertEqual((0, 0), diff._get_change_extent('xxx', 'yyy'))
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13 self.assertEqual((1, -1), diff._get_change_extent('xxx', 'xyx'))
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14 self.assertEqual((1, -1), diff._get_change_extent('xxx', 'xyyyx'))
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15 self.assertEqual((1, 0), diff._get_change_extent('xy', 'xzz'))
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16 self.assertEqual((1, -1), diff._get_change_extent('xyx', 'xzzx'))
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17 self.assertEqual((1, -1), diff._get_change_extent('xzzx', 'xyx'))
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18
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19 def test_insert_blank_line(self):
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20 opcodes = diff._get_opcodes(['A', 'B'], ['A', 'B', ''],
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21 ignore_blank_lines=0)
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22 self.assertEqual(('equal', 0, 2, 0, 2), opcodes.next())
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23 self.assertEqual(('insert', 2, 2, 2, 3), opcodes.next())
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24
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25 opcodes = diff._get_opcodes(['A', 'B'], ['A', 'B', ''],
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26 ignore_blank_lines=1)
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27 self.assertEqual(('equal', 0, 2, 0, 3), opcodes.next())
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28
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29 opcodes = diff._get_opcodes(['A'], ['A', 'B', ''],
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30 ignore_blank_lines=1)
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31 self.assertEqual(('equal', 0, 1, 0, 1), opcodes.next())
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32 self.assertEqual(('insert', 1, 1, 1, 3), opcodes.next())
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33
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34 def test_delete_blank_line(self):
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35 opcodes = diff._get_opcodes(['A', 'B', ''], ['A', 'B'],
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36 ignore_blank_lines=0)
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37 self.assertEqual(('equal', 0, 2, 0, 2), opcodes.next())
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38 self.assertEqual(('delete', 2, 3, 2, 2), opcodes.next())
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39
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40 opcodes = diff._get_opcodes(['A', 'B', ''], ['A', 'B'],
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41 ignore_blank_lines=1)
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42 self.assertEqual(('equal', 0, 3, 0, 2), opcodes.next())
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43
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44 opcodes = diff._get_opcodes(['A', 'B', ''], ['A'],
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45 ignore_blank_lines=1)
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46 self.assertEqual(('equal', 0, 1, 0, 1), opcodes.next())
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47 self.assertEqual(('delete', 1, 3, 1, 1), opcodes.next())
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48
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49 def test_space_changes(self):
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50 opcodes = diff._get_opcodes(['A', 'B b'], ['A', 'B b'],
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51 ignore_space_changes=0)
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52 self.assertEqual(('equal', 0, 1, 0, 1), opcodes.next())
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53 self.assertEqual(('replace', 1, 2, 1, 2), opcodes.next())
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54
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55 opcodes = diff._get_opcodes(['A', 'B b'], ['A', 'B b'],
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56 ignore_space_changes=1)
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57 self.assertEqual(('equal', 0, 2, 0, 2), opcodes.next())
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58
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59 def test_case_changes(self):
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60 opcodes = diff._get_opcodes(['A', 'B b'], ['A', 'B B'],
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61 ignore_case=0)
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62 self.assertEqual(('equal', 0, 1, 0, 1), opcodes.next())
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63 self.assertEqual(('replace', 1, 2, 1, 2), opcodes.next())
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64
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65 opcodes = diff._get_opcodes(['A', 'B b'], ['A', 'B B'],
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66 ignore_case=1)
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67 self.assertEqual(('equal', 0, 2, 0, 2), opcodes.next())
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68
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69 def test_space_and_case_changes(self):
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70 opcodes = diff._get_opcodes(['A', 'B b'], ['A', 'B B'],
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71 ignore_case=0, ignore_space_changes=0)
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72 self.assertEqual(('equal', 0, 1, 0, 1), opcodes.next())
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73 self.assertEqual(('replace', 1, 2, 1, 2), opcodes.next())
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74
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75 opcodes = diff._get_opcodes(['A', 'B b'], ['A', 'B B'],
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76 ignore_case=1, ignore_space_changes=1)
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77 self.assertEqual(('equal', 0, 2, 0, 2), opcodes.next())
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78
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79 def test_grouped_opcodes_context1(self):
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80 opcodes = diff._get_opcodes(['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H'],
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81 ['A', 'B', 'C', 'd', 'e', 'f', 'G', 'H'])
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82 groups = diff._group_opcodes(opcodes, n=1)
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83 group = groups.next()
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84 self.assertEqual(('equal', 2, 3, 2, 3), group[0])
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85 self.assertEqual(('replace', 3, 6, 3, 6), group[1])
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86 self.assertEqual(('equal', 6, 7, 6, 7), group[2])
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87
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88 def test_grouped_opcodes_insert_blank_line_at_top(self):
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89 """
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90 Regression test for #2090. Make sure that the equal block following an
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91 insert at the top of a file is correct.
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92 """
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93 opcodes = diff._get_opcodes(['B', 'C', 'D', 'E', 'F', 'G'],
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94 ['A', 'B', 'C', 'D', 'E', 'F', 'G'])
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95 groups = diff._group_opcodes(opcodes, n=3)
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96 self.assertEqual([('insert', 0, 0, 0, 1), ('equal', 0, 3, 1, 4)],
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97 groups.next())
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98
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99
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100 def suite():
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101 return unittest.makeSuite(DiffTestCase, 'test')
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102
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103 if __name__ == '__main__':
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104 unittest.main()
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