test.rb

require "minitest_cuprite"
minitest_cuprite "headless": "darwin" != Gem::Platform.local.os, timeout: 10
require "minitest/autorun"

describe :test do
  def open_data_uri string, status
    assert status.exitstatus.zero?, string
    visit "data:text/html;charset=UTF-8;base64,#{Base64.strict_encode64 string}"#.tap{ |_| File.write "temp.txt", _ }
  end
  def open_file string, status
    assert status.exitstatus.zero?, string
    File.write "temp.htm", string
    visit "file://#{File.expand_path "temp.htm"}"
  end

  require "dhash-vips"
  def check delta, expectation
    fingerprint = DHashVips::IDHash.fingerprint Vips::Image.new_from_buffer(Base64.decode64(
      evaluate_script("document.getElementsByTagName('canvas')[0].toDataURL()").split(?,)[1]
    ), "")#.tap{ |_| _.write_to_file "temp.png" }
    assert_in_delta 0, DHashVips::IDHash.distance(expectation, fingerprint), delta, ->{ "0x#{fingerprint.to_s 16}" }
  end

  require "open3"
  it "fen" do   # this example requires third-party gem
    open_data_uri *Bundler.with_unbundled_env{ Open3.capture2e "bundle install >/dev/null && bundle exec ruby main.rb 'r3r2k/p1n2pb1/3p3p/1ppP1qN1/4N3/P3P3/1PQ2PP1/R4K1R w - - 0 1'", chdir: "examples/fen" }
    check 11, 0xff8900000000ffffff9181808000ffffffdfa04201fe0000ffd12000c0090000
  end
  it "dot strip plot" do
    open_data_uri *Open3.capture2e("ruby examples/WO2022104460A1/main.rb")
    check 0, 0x1d5cdc0d1d0c1d9f5720a6fff2fe020180df0000df81c03f0080ffff0000ff7f
  end
  it "scatter plot" do
    unless File.exist? "all.tsv"
      # TODO: move this to the example source code because you want to run it outside of test suite
      require "open-uri"
      File.write "all.tsv", open("https://storage.yandexcloud.net/gems.nakilon.pro/p5rb/all.tsv", &:read)
    end
    open_file *Open3.capture2e("ruby examples/moscow/main.rb all.tsv")
    check 0, 0x2e0f3f2f9c983034009ef8fafcf870304f0f3020c102403c639e7c78f8020404
  end
  it "grouped bar chart" do
    open_data_uri *Open3.capture2e("ruby examples/bar_grouped.rb")
    check 1, 0xfd7cf00080fec23d7ffee0408340c2fffe0000d040ff388167008b80408080ff
  end
  it "stacked bar chart" do
    open_file *Bundler.with_unbundled_env{ Open3.capture2e("bundle exec ruby examples/bar_stacked.rb") }
    check 1, 0x63301b380a1ff87fffbf7c3f1f200000f7b3f8bf037c0081ff7f008040fcfc83
  end

end