/
free_space_spec.rb
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/
free_space_spec.rb
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require 'spec_helper'
RSpec.describe('FreeSpace parsing') do
specify('parse free space spaces') do
regexp = /a ? b * c + d{2,4}/x
root = RP.parse(regexp)
0.upto(6) do |i|
if i.odd?
expect(root[i]).to be_instance_of(WhiteSpace)
expect(root[i].text).to eq ' '
else
expect(root[i]).to be_instance_of(Literal)
expect(root[i]).to be_quantified
end
end
end
specify('parse non free space literals') do
regexp = /a b c d/
root = RP.parse(regexp)
expect(root.first).to be_instance_of(Literal)
expect(root.first.text).to eq 'a b c d'
end
specify('parse single-line free space comments without spaces') do
regexp = /a#b/x
root = RP.parse(regexp)
expect(root.length).to eq 2
expect(root[0]).to be_instance_of(Literal)
expect(root[1]).to be_instance_of(Comment)
end
specify('parse single-line free space comments with spaces') do
regexp = /a # b/x
root = RP.parse(regexp)
expect(root.length).to eq 3
expect(root[0]).to be_instance_of(Literal)
expect(root[1]).to be_instance_of(WhiteSpace)
expect(root[2]).to be_instance_of(Comment)
end
specify('parse free space comments') do
regexp = /
a ? # One letter
b {2,5} # Another one
[c-g] + # A set
(h|i|j) | # A group
klm#nospace before or after comment hash
nop +
/x
root = RP.parse(regexp)
alt = root.first
expect(alt).to be_instance_of(Alternation)
alt_1 = alt.alternatives.first
expect(alt_1).to be_instance_of(Alternative)
expect(alt_1.length).to eq 15
[0, 2, 4, 6, 8, 12, 14].each do |i|
expect(alt_1[i]).to be_instance_of(WhiteSpace)
end
[3, 7, 11].each { |i| expect(alt_1[i].class).to eq Comment }
alt_2 = alt.alternatives.last
expect(alt_2).to be_instance_of(Alternative)
expect(alt_2.length).to eq 8
[0, 2, 5, 7].each { |i| expect(alt_2[i].class).to eq WhiteSpace }
[1, 4].each { |i| expect(alt_2[i]).to be_instance_of(Comment) }
end
specify('parse free space nested comments') do
regexp = /
# Group one
(
abc # Comment one
\d? # Optional \d
)+
# Group two
(
def # Comment two
\s? # Optional \s
)?
/x
root = RP.parse(regexp)
top_comment_1 = root[1]
expect(top_comment_1).to be_instance_of(Comment)
expect(top_comment_1.text).to eq "# Group one\n"
expect(top_comment_1.starts_at).to eq 7
top_comment_2 = root[5]
expect(top_comment_2).to be_instance_of(Comment)
expect(top_comment_2.text).to eq "# Group two\n"
expect(top_comment_2.starts_at).to eq 95
[3, 7].each do |g,|
group = root[g]
[3, 7].each do |c|
comment = group[c]
expect(comment).to be_instance_of(Comment)
expect(comment.text.length).to eq 14
end
end
end
specify('parse free space quantifiers') do
regexp = /
a
# comment 1
?
(
b # comment 2
# comment 3
+
)
# comment 4
*
/x
root = RP.parse(regexp)
literal_1 = root[1]
expect(literal_1).to be_instance_of(Literal)
expect(literal_1).to be_quantified
expect(literal_1.quantifier.token).to eq :zero_or_one
group = root[5]
expect(group).to be_instance_of(Group::Capture)
expect(group).to be_quantified
expect(group.quantifier.token).to eq :zero_or_more
literal_2 = group[1]
expect(literal_2).to be_instance_of(Literal)
expect(literal_2).to be_quantified
expect(literal_2.quantifier.token).to eq :one_or_more
end
end