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require 'spec_helper'
RSpec.describe('FreeSpace scanning') do
describe('scan free space tokens') do
let(:tokens) { RS.scan(/
a
b ? c *
d {2,3}
e + | f +
/x) }
0.upto(24).select(&:even?).each do |i|
it "scans #{i} as free space" do
expect(tokens[i][0]).to eq :free_space
expect(tokens[i][1]).to eq :whitespace
end
end
0.upto(24).reject(&:even?).each do |i|
it "does not scan #{i} as free space" do
expect(tokens[i][0]).not_to eq :free_space
expect(tokens[i][1]).not_to eq :whitespace
end
end
it 'sets the correct text' do
[0, 2, 10, 14].each { |i| expect(tokens[i][2]).to eq "\n " }
[4, 6, 8, 12].each { |i| expect(tokens[i][2]).to eq ' ' }
end
end
describe('scan free space comments') do
include_examples 'scan', /
a + # A + comment
b ? # B ? comment
c {2,3} # C {2,3} comment
d + | e + # D|E comment
/x,
5 => [:free_space, :comment, "# A + comment\n", 11, 25],
11 => [:free_space, :comment, "# B ? comment\n", 37, 51],
17 => [:free_space, :comment, "# C {2,3} comment\n", 66, 84],
29 => [:free_space, :comment, "# D|E comment\n", 100, 114]
# single line / no trailing newline (c.f. issue #66)
include_examples 'scan', /a # b/x,
0 => [:literal, :literal, 'a', 0, 1],
1 => [:free_space, :whitespace, ' ', 1, 2],
2 => [:free_space, :comment, "# b", 2, 5]
# without spaces (c.f. issue #66)
include_examples 'scan', /a#b/x,
0 => [:literal, :literal, 'a', 0, 1],
1 => [:free_space, :comment, "#b", 1, 3]
end
describe('scan free space inlined') do
include_examples 'scan', /a b(?x:c d e)f g/,
0 => [:literal, :literal, 'a b', 0, 3],
1 => [:group, :options, '(?x:', 3, 7],
2 => [:literal, :literal, 'c', 7, 8],
3 => [:free_space, :whitespace, ' ', 8, 9],
4 => [:literal, :literal, 'd', 9, 10],
5 => [:free_space, :whitespace, ' ', 10, 11],
6 => [:literal, :literal, 'e', 11, 12],
7 => [:group, :close, ')', 12, 13],
8 => [:literal, :literal, 'f g', 13, 16]
end
describe('scan free space nested') do
include_examples 'scan', /a b(?x:c d(?-x:e f)g h)i j/,
0 => [:literal, :literal, 'a b', 0, 3],
1 => [:group, :options, '(?x:', 3, 7],
2 => [:literal, :literal, 'c', 7, 8],
3 => [:free_space, :whitespace, ' ', 8, 9],
4 => [:literal, :literal, 'd', 9, 10],
5 => [:group, :options, '(?-x:', 10, 15],
6 => [:literal, :literal, 'e f', 15, 18],
7 => [:group, :close, ')', 18, 19],
8 => [:literal, :literal, 'g', 19, 20],
9 => [:free_space, :whitespace, ' ', 20, 21],
10 => [:literal, :literal, 'h', 21, 22],
11 => [:group, :close, ')', 22, 23],
12 => [:literal, :literal, 'i j', 23, 26]
end
describe('scan free space nested groups') do
include_examples 'scan', /(a (b(?x: (c d) (?-x:(e f) )g) h)i j)/,
0 => [:group, :capture, '(', 0, 1],
1 => [:literal, :literal, 'a ', 1, 3],
2 => [:group, :capture, '(', 3, 4],
3 => [:literal, :literal, 'b', 4, 5],
4 => [:group, :options, '(?x:', 5, 9],
5 => [:free_space, :whitespace, ' ', 9, 10],
6 => [:group, :capture, '(', 10, 11],
7 => [:literal, :literal, 'c', 11, 12],
8 => [:free_space, :whitespace, ' ', 12, 13],
9 => [:literal, :literal, 'd', 13, 14],
10 => [:group, :close, ')', 14, 15],
11 => [:free_space, :whitespace, ' ', 15, 16],
12 => [:group, :options, '(?-x:', 16, 21],
13 => [:group, :capture, '(', 21, 22],
14 => [:literal, :literal, 'e f', 22, 25],
15 => [:group, :close, ')', 25, 26],
16 => [:literal, :literal, ' ', 26, 27],
17 => [:group, :close, ')', 27, 28],
18 => [:literal, :literal, 'g', 28, 29],
19 => [:group, :close, ')', 29, 30],
20 => [:literal, :literal, ' h', 30, 32],
21 => [:group, :close, ')', 32, 33],
22 => [:literal, :literal, 'i j', 33, 36],
23 => [:group, :close, ')', 36, 37]
end
describe('scan free space switch groups') do
include_examples 'scan', /(a (b((?x) (c d) ((?-x)(e f) )g) h)i j)/,
0 => [:group, :capture, '(', 0, 1],
1 => [:literal, :literal, 'a ', 1, 3],
2 => [:group, :capture, '(', 3, 4],
3 => [:literal, :literal, 'b', 4, 5],
4 => [:group, :capture, '(', 5, 6],
5 => [:group, :options_switch, '(?x', 6, 9],
6 => [:group, :close, ')', 9, 10],
7 => [:free_space, :whitespace, ' ', 10, 11],
8 => [:group, :capture, '(', 11, 12],
9 => [:literal, :literal, 'c', 12, 13],
10 => [:free_space, :whitespace, ' ', 13, 14],
11 => [:literal, :literal, 'd', 14, 15],
12 => [:group, :close, ')', 15, 16],
13 => [:free_space, :whitespace, ' ', 16, 17],
14 => [:group, :capture, '(', 17, 18],
15 => [:group, :options_switch, '(?-x', 18, 22],
16 => [:group, :close, ')', 22, 23],
17 => [:group, :capture, '(', 23, 24],
18 => [:literal, :literal, 'e f', 24, 27],
19 => [:group, :close, ')', 27, 28],
20 => [:literal, :literal, ' ', 28, 29],
21 => [:group, :close, ')', 29, 30],
22 => [:literal, :literal, 'g', 30, 31],
23 => [:group, :close, ')', 31, 32],
24 => [:literal, :literal, ' h', 32, 34],
25 => [:group, :close, ')', 34, 35],
26 => [:literal, :literal, 'i j', 35, 38],
27 => [:group, :close, ')', 38, 39]
end
describe('scanning `#` in regular (non-x mode)') do # c.f. issue 70
include_examples 'scan', /a#bcd/,
0 => [:literal, :literal, 'a#bcd', 0, 5]
include_examples 'scan', /a # bcd/,
0 => [:literal, :literal, 'a # bcd', 0, 7]
include_examples 'scan', /a#\d/,
0 => [:literal, :literal, 'a#', 0, 2],
1 => [:type, :digit, '\d', 2, 4]
include_examples 'scan', /a # \d/,
0 => [:literal, :literal, 'a # ', 0, 4],
1 => [:type, :digit, '\d', 4, 6]
include_examples 'scan', /a#()/,
0 => [:literal, :literal, 'a#', 0, 2],
1 => [:group, :capture, '(', 2, 3]
include_examples 'scan', /a # ()/,
0 => [:literal, :literal, 'a # ', 0, 4],
1 => [:group, :capture, '(', 4, 5]
end
end
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