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
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
require 'cucumber/cucumber_expressions/tree_regexp'
module Cucumber
module CucumberExpressions
describe TreeRegexp do
it 'exposes group source' do
tr = TreeRegexp.new(/(a(?:b)?)(c)/)
expect(tr.group_builder.children.map{|gb| gb.source}).to eq(['a(?:b)?', 'c'])
end
it 'builds tree' do
tr = TreeRegexp.new(/(a(?:b)?)(c)/)
group = tr.match('ac')
expect(group.value).to eq('ac')
expect(group.children[0].value).to eq('a')
expect(group.children[0].children).to eq([])
expect(group.children[1].value).to eq('c')
end
it 'ignores `?:` as a non-capturing group' do
tr = TreeRegexp.new(/a(?:b)(c)/)
group = tr.match('abc')
expect(group.value).to eq('abc')
expect(group.children.length).to eq 1
end
it 'ignores `?!` as a non-capturing group' do
tr = TreeRegexp.new(/a(?!b)(.+)/)
group = tr.match('aBc')
expect(group.value).to eq('aBc')
expect(group.children.length).to eq 1
end
it 'ignores `?=` as a non-capturing group' do
tr = TreeRegexp.new(/a(?=b)(.+)$/)
group = tr.match('abc')
expect(group.value).to eq('abc')
expect(group.children[0].value).to eq('bc')
expect(group.children.length).to eq 1
end
it 'ignores `?<=` as a non-capturing group' do
tr = TreeRegexp.new(/a(.+)(?<=c)$/)
group = tr.match('abc')
expect(group.value).to eq('abc')
expect(group.children[0].value).to eq('bc')
expect(group.children.length).to eq 1
end
it 'ignores `?<!` as a non-capturing group' do
tr = TreeRegexp.new(/a(.+)(?<!b)$/)
group = tr.match('abc')
expect(group.value).to eq('abc')
expect(group.children[0].value).to eq('bc')
expect(group.children.length).to eq 1
end
it 'matches optional group' do
tr = TreeRegexp.new(/^Something( with an optional argument)?/)
group = tr.match('Something')
expect(group.children[0].value).to eq(nil)
end
it 'matches nested groups' do
tr = TreeRegexp.new(/^A (\d+) thick line from ((\d+),\s*(\d+),\s*(\d+)) to ((\d+),\s*(\d+),\s*(\d+))/)
group = tr.match('A 5 thick line from 10,20,30 to 40,50,60')
expect(group.children[0].value).to eq('5')
expect(group.children[1].value).to eq('10,20,30')
expect(group.children[1].children[0].value).to eq('10')
expect(group.children[1].children[1].value).to eq('20')
expect(group.children[1].children[2].value).to eq('30')
expect(group.children[2].value).to eq('40,50,60')
expect(group.children[2].children[0].value).to eq('40')
expect(group.children[2].children[1].value).to eq('50')
expect(group.children[2].children[2].value).to eq('60')
end
it 'detects multiple non capturing groups' do
tr = TreeRegexp.new(/(?:a)(:b)(\?c)(d)/)
group = tr.match("a:b?cd")
expect(group.children.length).to eq(3)
end
it 'works with escaped backslash' do
tr = TreeRegexp.new(/foo\\(bar|baz)/)
group = tr.match("foo\\bar")
expect(group.children.length).to eq(1)
end
it 'works with escaped slash' do
tr = TreeRegexp.new(/^I go to '\/(.+)'$/)
group = tr.match("I go to '/hello'")
expect(group.children.length).to eq(1)
end
it 'works with digit and word' do
tr = TreeRegexp.new(/^(\d) (\w+)$/)
group = tr.match("2 you")
expect(group.children.length).to eq(2)
end
it 'captures non capturing groups with capturing groups inside' do
tr = TreeRegexp.new(/the stdout(?: from "(.*?)")?/)
group = tr.match("the stdout")
expect(group.value).to eq("the stdout")
expect(group.children[0].value).to eq(nil)
expect(group.children.length).to eq(1)
end
it 'works with flags' do
tr = TreeRegexp.new(/HELLO/i)
group = tr.match("hello")
expect(group.value).to eq("hello")
end
it('does not consider parenthesis in character class as group') do
tr = TreeRegexp.new(/^drawings: ([A-Z_, ()]+)$/)
group = tr.match('drawings: ONE, TWO(ABC)')
expect(group.value).to eq('drawings: ONE, TWO(ABC)')
expect(group.children[0].value).to eq('ONE, TWO(ABC)')
expect(group.children.length).to eq(1)
end
it 'throws an error when there are named capture groups because they are buggy in Ruby' do
# https://github.com/cucumber/cucumber/issues/329
expect {
TreeRegexp.new(/^I am a person( named "(?<first_name>.+) (?<last_name>.+)")?$/)
}.to raise_error(/Named capture groups are not supported/)
end
end
end
end
|
