liquid/test/unit/tokenizer_unit_test.rb

# frozen_string_literal: true

require 'test_helper'

class TokenizerTest < Minitest::Test
  def test_tokenize_strings
    assert_equal([' '], tokenize(' '))
    assert_equal(['hello world'], tokenize('hello world'))
  end

  def test_tokenize_variables
    assert_equal(['{{funk}}'], tokenize('{{funk}}'))
    assert_equal([' ', '{{funk}}', ' '], tokenize(' {{funk}} '))
    assert_equal([' ', '{{funk}}', ' ', '{{so}}', ' ', '{{brother}}', ' '], tokenize(' {{funk}} {{so}} {{brother}} '))
    assert_equal([' ', '{{  funk  }}', ' '], tokenize(' {{  funk  }} '))
  end

  def test_tokenize_blocks
    assert_equal(['{%comment%}'], tokenize('{%comment%}'))
    assert_equal([' ', '{%comment%}', ' '], tokenize(' {%comment%} '))

    assert_equal([' ', '{%comment%}', ' ', '{%endcomment%}', ' '], tokenize(' {%comment%} {%endcomment%} '))
    assert_equal(['  ', '{% comment %}', ' ', '{% endcomment %}', ' '], tokenize("  {% comment %} {% endcomment %} "))
  end

  def test_calculate_line_numbers_per_token_with_profiling
    assert_equal([1],       tokenize_line_numbers("{{funk}}"))
    assert_equal([1, 1, 1], tokenize_line_numbers(" {{funk}} "))
    assert_equal([1, 2, 2], tokenize_line_numbers("\n{{funk}}\n"))
    assert_equal([1, 1, 3], tokenize_line_numbers(" {{\n funk \n}} "))
  end

  private

  def new_tokenizer(source, parse_context: Liquid::ParseContext.new, start_line_number: nil)
    parse_context.new_tokenizer(source, start_line_number: start_line_number)
  end

  def tokenize(source)
    tokenizer = new_tokenizer(source)
    tokens    = []
    # shift is private in Liquid::C::Tokenizer, since it is only for unit testing
    while (t = tokenizer.send(:shift))
      tokens << t
    end
    tokens
  end

  def tokenize_line_numbers(source)
    tokenizer    = new_tokenizer(source, start_line_number: 1)
    line_numbers = []
    loop do
      line_number = tokenizer.line_number
      if tokenizer.send(:shift)
        line_numbers << line_number
      else
        break
      end
    end
    line_numbers
  end
end