test-gem-installation

#! /usr/bin/env ruby
# frozen_string_literal: true
#
#  this script is intended to run as part of the CI test suite.
#
#  it inspects the filesystem of a nokogiri gem installation to ensure it's complete and sane, and
#  doesn't install anything we don't expect.
#
#  this file isn't in the `test/` subdirectory because it's intended to be run standalone against an
#  installed gem (and not against the source code or behavior of the gem itself).
#

# this line needs to come before the bundler bit, to assert that we're running against an
# already-installed version (and not some other version that bundler/inline might install if it came
# first)
gemspec = Gem::Specification.find_by_name('nokogiri')
raise "could not find installed gem" unless gemspec

require "bundler/inline"

gemfile do
  source "https://rubygems.org"
  gem "minitest"
  gem "minitest-reporters"
  gem "nokogiri"
end

require 'nokogiri'
require 'yaml'

if ARGV.include?("-v")
  puts "---------- Nokogiri version info ----------"
  puts Nokogiri::VERSION_INFO.to_yaml
  puts
  puts "---------- Nokogiri installed gemspec ----------"
  puts gemspec.to_ruby
  puts
end

require "minitest/autorun"
require "minitest/reporters"
Minitest::Reporters.use!([Minitest::Reporters::SpecReporter.new])

puts "Testing #{gemspec.full_name} installed in #{gemspec.base_dir}"
describe gemspec.full_name do
  let(:ruby_maj_min) { Gem::Version.new(::RUBY_VERSION).segments[0..1].join(".") }
  let(:nokogiri_lib_dir) { File.join(gemspec.gem_dir, "lib/nokogiri") }
  let(:nokogiri_ext_dir) { File.join(gemspec.gem_dir, "ext/nokogiri") }
  let(:nokogiri_include_dir) { File.join(nokogiri_ext_dir, "include") }

  # representative sample of the files
  let(:nokogiri_header_files) { ["nokogiri.h"] }
  let(:packaged_library_header_files) { ["libxml2/libxml/tree.h", "libxslt/xslt.h", "libexslt/exslt.h"] }

  let(:headers_dirs) { Nokogiri::VERSION_INFO["nokogiri"]["cppflags"].map { |f| f.gsub(/^-I/, "") } }

  it "loads the same version as the spec we've loaded" do
    assert_equal(Nokogiri::VERSION, gemspec.version.to_s)
  end

  describe "cruby" do
    it "installs nokogiri headers" do
      nokogiri_header_files.each do |header|
        assert(File.file?(File.join(nokogiri_ext_dir, header)),
               "expected #{header} to be installed in #{nokogiri_ext_dir}")

        found = false
        headers_dirs.each do |header_dir|
          found = true if File.file?(File.join(header_dir, "nokogiri.h"))
        end
        assert(found, "expected to find nokogiri.h in one of: #{headers_dirs.inspect}")
      end
    end

    describe "native platform" do
      it "declares packaged, precompiled libraries" do
        assert(Nokogiri::VersionInfo.instance.libxml2_using_packaged?)
        assert(Nokogiri::VERSION_INFO["libxml"].key?("source"))
        assert_equal("packaged", Nokogiri::VERSION_INFO["libxml"]["source"])

        assert(Nokogiri::VersionInfo.instance.libxml2_precompiled?)
        assert(Nokogiri::VERSION_INFO["libxml"].key?("precompiled"))
        assert(Nokogiri::VERSION_INFO["libxml"]["precompiled"])
      end
    end if gemspec.platform.is_a?(Gem::Platform) && gemspec.platform.cpu

    describe "library" do
      describe "packaged" do
        describe "for nokogumbo" do
          # this is for nokogumbo and shouldn't be forever
          it "declares where headers are installed" do
            assert_equal(nokogiri_ext_dir, Nokogiri::VERSION_INFO["libxml"]["libxml2_path"],
                         "expected Nokogiri::VERSION_INFO to point to #{nokogiri_ext_dir}")
          end

          it "installs packaged libraries' headers" do
            packaged_library_header_files.each do |header|
              assert(File.file?(File.join(nokogiri_include_dir, header)),
                     "expected #{header} to be installed in #{nokogiri_include_dir}")
            end
          end
        end

        it "points to packaged libraries' headers" do
          packaged_library_header_files.each do |header|
            found = false
            headers_dirs.each do |header_dir|
              found = true if File.file?(File.join(header_dir, header))
            end
            assert(found, "expected to find #{header} in one of: #{headers_dirs.inspect}")
          end
        end

        it "has ldflags pointing to the shared object file" do
          ldflags = Nokogiri::VERSION_INFO["nokogiri"]["ldflags"]
          if ::RUBY_PLATFORM =~ /mingw|mswin/
            if gemspec.platform.cpu
              assert_includes(ldflags, "-L#{File.join(nokogiri_lib_dir, ruby_maj_min)}")
            else
              assert_includes(ldflags, "-L#{nokogiri_lib_dir}")
            end
            assert_includes(ldflags, "-l:nokogiri.so")
          else
            assert_empty(ldflags)
          end
        end
      end if Nokogiri::VersionInfo.instance.libxml2_using_packaged?

      describe "using system libraries" do
        it "doesn't declare where headers are installed" do
          refute(Nokogiri::VERSION_INFO["libxml"].key?("libxml2_path"))
        end

        it "does not install packaged libraries' headers" do
          packaged_library_header_files.each do |header|
            dir = File.join(nokogiri_include_dir, File.dirname(header))
            refute(File.directory?(dir), "expected directory #{dir} to not exist")
          end
        end
      end unless Nokogiri::VersionInfo.instance.libxml2_using_packaged?
    end
  end unless gemspec.platform == Gem::Platform.new("java")
end