Package lepl :: Package lexer :: Package lines :: Package _test :: Module offside
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Source Code for Module lepl.lexer.lines._test.offside

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 12  # The Original Code is LEPL (http://www.acooke.org/lepl) 
 13  # The Initial Developer of the Original Code is Andrew Cooke. 
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 15  # Andrew Cooke (andrew@acooke.org). All Rights Reserved. 
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 29   
 30  ''' 
 31  Tests for offside parsing. 
 32  ''' 
 33   
 34  from logging import basicConfig, DEBUG 
 35  from unittest import TestCase 
 36   
 37  from lepl.lexer.matchers import Token 
 38  from lepl.matchers.combine import Or 
 39  from lepl.matchers.core import Delayed 
 40  from lepl.matchers.derived import Letter, Digit 
 41  from lepl.matchers.monitor import Trace 
 42  from lepl.lexer.lines.matchers import Block, Line, explicit, \ 
 43      ContinuedLineFactory 
 44   
 45   
 46  # pylint: disable-msg=R0201 
 47  # unittest convention 
48 -class OffsideTest(TestCase):
49 ''' 50 Test lines and blocks. 51 ''' 52
53 - def simple_grammar(self):
54 ''' 55 Test a simple example: letters introduce numbers in an indented block. 56 ''' 57 #basicConfig(level=DEBUG) 58 59 number = Token(Digit()) 60 letter = Token(Letter()) 61 62 # the simplest whitespace grammar i can think of - lines are either 63 # numbers (which are single, simple statements) or letters (which 64 # mark the start of a new, indented block). 65 block = Delayed() 66 line = Or(Line(number), 67 Line(letter) & block) > list 68 # and a block is simply a collection of lines, as above 69 block += Block(line[1:]) 70 71 program = Trace(line[1:]) 72 program.config.lines(block_policy=1) 73 return program
74
75 - def test_single_line(self):
76 program = self.simple_grammar() 77 text = '''1''' 78 parser = program.get_parse_string() 79 result = parser(text) 80 assert result == [['1']], result
81
82 - def test_two_lines(self):
83 program = self.simple_grammar() 84 text = '''1 85 2 86 ''' 87 parser = program.get_parse_string() 88 result = parser(text) 89 assert result == [['1'], 90 ['2']], result
91
92 - def test_single_block(self):
93 #basicConfig(level=DEBUG) 94 program = self.simple_grammar() 95 text = '''a 96 3 97 ''' 98 parser = program.get_parse_string() 99 result = parser(text) 100 assert result == [['a', ['3']]], result
101
102 - def test_bline(self):
103 program = self.simple_grammar() 104 text = '''1 105 2 106 a 107 3 108 b 109 4 110 5 111 6 112 ''' 113 parser = program.get_parse_string() 114 result = parser(text) 115 assert result == [['1'], 116 ['2'], 117 ['a', ['3'], 118 ['b', ['4'], 119 ['5']], 120 ['6']]], result
121
122 - def test_explicit(self):
123 #basicConfig(level=DEBUG) 124 number = Token(Digit()) 125 letter = Token(Letter()) 126 127 block = Delayed() 128 line = Or(Line(number), 129 Line(letter) & block) > list 130 block += Block(line[1:]) 131 132 program = Trace(line[1:]) 133 134 text = '''1 135 2 136 a 137 3 138 b 139 4 140 5 141 6 142 ''' 143 program.config.lines(block_policy=explicit) 144 parser = program.get_parse_string() 145 result = parser(text) 146 assert result == [['1'], 147 ['2'], 148 ['a', ['3'], 149 ['b', ['4'], 150 ['5']], 151 ['6']]], result
152
153 - def test_continued_explicit(self):
154 number = Token(Digit()) 155 letter = Token(Letter()) 156 157 block = Delayed() 158 bline = ContinuedLineFactory(r'x') 159 line = Or(bline(number), 160 bline(letter) & block) > list 161 block += Block(line[1:]) 162 163 program = Trace(line[1:]) 164 165 text = '''1 166 2 167 a 168 3 169 b 170 4 171 5 172 6 173 ''' 174 program.config.lines(block_policy=explicit) 175 parser = program.get_parse_string() 176 result = parser(text) 177 assert result == [['1'], 178 ['2'], 179 ['a', ['3'], 180 ['b', ['4'], 181 ['5']], 182 ['6']]], result
183