test_gem_source.rb

# frozen_string_literal: true

require_relative "helper"
require "rubygems/source"

class TestGemSource < Gem::TestCase
  def tuple(*args)
    Gem::NameTuple.new(*args)
  end

  def setup
    super

    @specs = spec_fetcher do |fetcher|
      fetcher.spec "a", "1.a"
      fetcher.gem  "a", 1
      fetcher.spec "a", 2
      fetcher.spec "b", 2
    end

    @source = Gem::Source.new(@gem_repo)
  end

  def test_initialize_invalid_uri
    assert_raise URI::InvalidURIError do
      Gem::Source.new "git@example:a.git"
    end
  end

  def test_initialize_git
    repository = "git@example:a.git"

    source = Gem::Source::Git.new "a", repository, nil, false

    assert_equal repository, source.uri
  end

  def test_cache_dir_escapes_windows_paths
    uri = URI.parse("file:///C:/WINDOWS/Temp/gem_repo")
    root = Gem.spec_cache_dir
    cache_dir = @source.cache_dir(uri).gsub(root, "")
    assert !cache_dir.include?(":"), "#{cache_dir} should not contain a :"
  end

  def test_dependency_resolver_set_bundler_api
    response = Gem::Net::HTTPResponse.new "1.1", 200, "OK"
    response.uri = URI("http://example")

    @fetcher.data[@gem_repo] = response

    set = @source.dependency_resolver_set

    assert_kind_of Gem::Resolver::APISet, set
  end

  def test_dependency_resolver_set_file_uri
    File.write(File.join(@tempdir, "prerelease_specs.4.8.gz"), Gem::Util.gzip("\x04\x08[\x05".b))
    File.write(File.join(@tempdir, "specs.4.8.gz"), Gem::Util.gzip("\x04\x08[\x05".b))

    source = Gem::Source.new "file://#{@tempdir}/"

    set = source.dependency_resolver_set

    assert_kind_of Gem::Resolver::IndexSet, set
  end

  def test_dependency_resolver_set_marshal_api
    set = @source.dependency_resolver_set

    assert_kind_of Gem::Resolver::IndexSet, set
  end

  def test_fetch_spec
    a1 = @specs["a-1"]

    spec_uri = "#{@gem_repo}#{Gem::MARSHAL_SPEC_DIR}#{a1.spec_name}"

    spec = @source.fetch_spec tuple("a", Gem::Version.new(1), "ruby")
    assert_equal a1.full_name, spec.full_name

    cache_dir = @source.cache_dir URI.parse(spec_uri)

    cache_file = File.join cache_dir, a1.spec_name

    assert File.exist?(cache_file)
  end

  def test_fetch_spec_cached
    a1 = @specs["a-1"]

    spec_uri = "#{@gem_repo}/#{Gem::MARSHAL_SPEC_DIR}#{a1.spec_name}"
    @fetcher.data["#{spec_uri}.rz"] = nil

    cache_dir = @source.cache_dir URI.parse(spec_uri)
    FileUtils.mkdir_p cache_dir

    cache_file = File.join cache_dir, a1.spec_name

    File.open cache_file, "wb" do |io|
      Marshal.dump a1, io
    end

    spec = @source.fetch_spec tuple("a", Gem::Version.new(1), "ruby")
    assert_equal a1.full_name, spec.full_name
  end

  def test_fetch_spec_platform
    specs = spec_fetcher(&:legacy_platform)

    spec = @source.fetch_spec tuple("pl", Gem::Version.new(1), "i386-linux")

    assert_equal specs["pl-1-x86-linux"].full_name, spec.full_name
  end

  def test_fetch_spec_platform_ruby
    spec = @source.fetch_spec tuple("a", Gem::Version.new(1), nil)
    assert_equal @specs["a-1"].full_name, spec.full_name

    spec = @source.fetch_spec tuple("a", Gem::Version.new(1), "")
    assert_equal @specs["a-1"].full_name, spec.full_name
  end

  def test_load_specs
    released = @source.load_specs(:released).map(&:full_name)
    assert_equal %W[a-2 a-1 b-2], released

    cache_dir = File.join Gem.spec_cache_dir, "gems.example.com%80"
    assert File.exist?(cache_dir), "#{cache_dir} does not exist"

    cache_file = File.join cache_dir, "specs.#{Gem.marshal_version}"
    assert File.exist?(cache_file)
  end

  def test_load_specs_cached
    latest_specs = @source.load_specs :latest

    # Make sure the cached version is actually different:
    latest_specs << Gem::NameTuple.new("cached", Gem::Version.new("1.0.0"), "ruby")

    @fetcher.data["#{@gem_repo}latest_specs.#{Gem.marshal_version}.gz"] = nil
    @fetcher.data["#{@gem_repo}latest_specs.#{Gem.marshal_version}"] =
      " " * Marshal.dump(latest_specs).length

    cache_dir = File.join Gem.spec_cache_dir, "gems.example.com%80"

    FileUtils.mkdir_p cache_dir

    cache_file = File.join cache_dir, "latest_specs.#{Gem.marshal_version}"

    File.open cache_file, "wb" do |io|
      Marshal.dump latest_specs, io
    end

    cached_specs = @source.load_specs :latest

    assert_equal latest_specs, cached_specs
  end

  def test_load_specs_cached_empty
    latest_specs = @source.load_specs :latest

    # Make sure the cached version is actually different:
    latest_specs << Gem::NameTuple.new("fixed", Gem::Version.new("1.0.0"), "ruby")
    # Setup valid data on the 'remote'
    @fetcher.data["#{@gem_repo}latest_specs.#{Gem.marshal_version}.gz"] =
      util_gzip(Marshal.dump(latest_specs))

    cache_dir = File.join Gem.spec_cache_dir, "gems.example.com%80"

    FileUtils.mkdir_p cache_dir

    cache_file = File.join cache_dir, "latest_specs.#{Gem.marshal_version}"

    File.open cache_file, "wb" do |io|
      # Setup invalid data in the cache:
      io.write Marshal.dump(latest_specs)[0, 10]
    end

    fixed_specs = @source.load_specs :latest

    assert_equal latest_specs, fixed_specs
  end

  def test_load_specs_from_unavailable_uri
    src = Gem::Source.new("http://not-there.nothing")

    assert_raise Gem::RemoteFetcher::FetchError do
      src.load_specs :latest
    end
  end

  def test_spaceship
    remote    = @source
    specific  = Gem::Source::SpecificFile.new @specs["a-1"].cache_file
    installed = Gem::Source::Installed.new
    local     = Gem::Source::Local.new

    assert_equal(0, remote.<=>(remote), "remote <=> remote") # rubocop:disable Lint/BinaryOperatorWithIdenticalOperands

    assert_equal(-1, remote.<=>(specific), "remote <=> specific")
    assert_equal(1, specific.<=>(remote), "specific <=> remote")

    assert_equal(-1, remote.<=>(local), "remote <=> local")
    assert_equal(1, local.<=>(remote), "local <=> remote")

    assert_equal(-1, remote.<=>(installed), "remote <=> installed")
    assert_equal(1, installed.<=>(remote), "installed <=> remote")

    no_uri = @source.dup
    no_uri.instance_variable_set :@uri, nil

    assert_equal(-1, remote.<=>(no_uri), "remote <=> no_uri")
  end

  def test_spaceship_order_is_preserved_when_uri_differs
    source_a = Gem::Source.new "http://example.com/a"
    source_b = Gem::Source.new "http://example.com/b"

    assert_equal(0, source_a.<=>(source_a), "source_a <=> source_a") # rubocop:disable Lint/BinaryOperatorWithIdenticalOperands
    assert_equal(1, source_a.<=>(source_b), "source_a <=> source_b")
    assert_equal(1, source_b.<=>(source_a), "source_b <=> source_a")
  end

  def test_update_cache_eh
    assert @source.update_cache?
  end

  def test_update_cache_eh_home_nonexistent
    FileUtils.rmdir Gem.user_home

    refute @source.update_cache?
  end

  def test_typo_squatting
    rubygems_source = Gem::Source.new("https://rubgems.org")
    assert rubygems_source.typo_squatting?("rubygems.org")
    assert rubygems_source.typo_squatting?("rubyagems.org")
    assert rubygems_source.typo_squatting?("rubyasgems.org")
    refute rubygems_source.typo_squatting?("rubysertgems.org")
  end

  def test_typo_squatting_false_positive
    rubygems_source = Gem::Source.new("https://rubygems.org")
    refute rubygems_source.typo_squatting?("rubygems.org")
  end

  def test_typo_squatting_custom_distance_threshold
    rubygems_source = Gem::Source.new("https://rubgems.org")
    distance_threshold = 5
    assert rubygems_source.typo_squatting?("rubysertgems.org", distance_threshold)
  end
end