1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
require File.expand_path('../helper', __FILE__)
class AliasTest < Test::Unit::TestCase
def test_terminal?
rule = Alias.new
assert_equal(false, rule.terminal?)
end
def test_exec
grammar = Grammar.new {
rule :a, :b
rule :b, 'abc'
}
rule_a = grammar.rule(:a)
events = rule_a.exec(Input.new('abc'))
assert_equal([rule_a, CLOSE, 3], events)
end
def test_exec_miss
grammar = Grammar.new {
rule :a, :b
rule :b, 'abc'
}
rule = grammar.rule(:a)
events = rule.exec(Input.new('def'))
assert_equal([], events)
end
def test_exec_included
grammar1 = Grammar.new {
rule :a, 'abc'
}
grammar2 = Grammar.new {
include grammar1
rule :b, :a
}
rule_b2 = grammar2.rule(:b)
events = rule_b2.exec(Input.new('abc'))
assert_equal([rule_b2, CLOSE, 3], events)
end
def test_to_s
rule = Alias.new(:alpha)
assert_equal('alpha', rule.to_s)
end
def test_to_s_with_label
rule = Alias.new(:alpha)
rule.label = 'a_label'
assert_equal('a_label:alpha', rule.to_s)
end
end
|
