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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Gitlab::Changelog::Parser do
let(:parser) { described_class.new }
describe '#root' do
it 'parses an empty template' do
expect(parser.root).to parse('')
end
it 'parses a variable with a single identifier step' do
expect(parser.root).to parse('{{foo}}')
end
it 'parses a variable with a single integer step' do
expect(parser.root).to parse('{{0}}')
end
it 'parses a variable with multiple selector steps' do
expect(parser.root).to parse('{{foo.bar}}')
end
it 'parses a variable with an integer selector step' do
expect(parser.root).to parse('{{foo.bar.0}}')
end
it 'parses the special "it" variable' do
expect(parser.root).to parse('{{it}}')
end
it 'parses a text node' do
expect(parser.root).to parse('foo')
end
it 'parses an if expression' do
expect(parser.root).to parse('{% if foo %}bar{% end %}')
end
it 'parses an if-else expression' do
expect(parser.root).to parse('{% if foo %}bar{% else %}baz{% end %}')
end
it 'parses an each expression' do
expect(parser.root).to parse('{% each foo %}foo{% end %}')
end
it 'parses an escaped newline' do
expect(parser.root).to parse("foo\\\nbar")
end
it 'parses a regular newline' do
expect(parser.root).to parse("foo\nbar")
end
it 'parses the default changelog template' do
expect(parser.root).to parse(Gitlab::Changelog::Config::DEFAULT_TEMPLATE)
end
it 'raises an error when parsing an integer selector that is too large' do
expect(parser.root).not_to parse('{{100000000000}}')
end
end
describe '#parse_and_transform' do
it 'parses and transforms a template' do
node = parser.parse_and_transform('foo')
expect(node).to be_instance_of(Gitlab::Changelog::AST::Expressions)
end
it 'raises parsing errors using a custom error class' do
expect { parser.parse_and_transform('{% each') }
.to raise_error(Gitlab::Changelog::Error)
end
end
end
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