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# frozen_string_literal: true
require "abstract_unit"
require "multibyte_test_helpers"
require "fileutils"
require "open-uri"
require "tmpdir"
class MultibyteGraphemeBreakConformanceTest < ActiveSupport::TestCase
include MultibyteTestHelpers
UNIDATA_FILE = "/auxiliary/GraphemeBreakTest.txt"
RUN_P = begin
Downloader.download(UNIDATA_URL + UNIDATA_FILE, CACHE_DIR + UNIDATA_FILE)
rescue
end
def setup
skip "Unable to download test data" unless RUN_P
end
def test_breaks
each_line_of_break_tests do |*cols|
*clusters, comment = *cols
packed = ActiveSupport::Multibyte::Unicode.pack_graphemes(clusters)
assert_equal clusters, ActiveSupport::Multibyte::Unicode.unpack_graphemes(packed), comment
end
end
private
def each_line_of_break_tests(&block)
lines = 0
max_test_lines = 0 # Don't limit below 21, because that's the header of the testfile
File.open(File.join(CACHE_DIR, UNIDATA_FILE), "r") do | f |
until f.eof? || (max_test_lines > 21 && lines > max_test_lines)
lines += 1
line = f.gets.chomp!
next if line.empty? || line.start_with?("#")
cols, comment = line.split("#")
# Cluster breaks are represented by ÷
clusters = cols.split("÷").map { |e| e.strip }.reject { |e| e.empty? }
clusters = clusters.map do |cluster|
# Codepoints within each cluster are separated by ×
codepoints = cluster.split("×").map { |e| e.strip }.reject { |e| e.empty? }
# codepoints are in hex in the test suite, pack wants them as integers
codepoints.map { |codepoint| codepoint.to_i(16) }
end
# The tests contain a solitary U+D800 <Non Private Use High
# Surrogate, First> character, which Ruby does not allow to stand
# alone in a UTF-8 string. So we'll just skip it.
next if clusters.flatten.include?(0xd800)
clusters << comment.strip
yield(*clusters)
end
end
end
end
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