# class Gem::InstallerTestCase

A test case for `Gem::Installer`.

### Public Instance Methods

setup() click to toggle source

Creates the following instance variables:

@spec

  a spec named 'a', intended for regular installs

@user_spec

  a spec named 'b', intended for user installs

@gem

  the path to a built gem from @spec

@user_spec

  the path to a built gem from @user_spec

@installer

  a `Gem::Installer` for the @spec that installs into @gemhome

@user_installer

  a `Gem::Installer` for the @user_spec that installs into `Gem.user_dir`

Calls superclass method `Gem::TestCase#setup`

    # File lib/rubygems/installer_test_case.rb, line 86
    def setup
      super

      @spec = quick_gem 'a' do |spec|
        util_make_exec spec
      end

      @user_spec = quick_gem 'b' do |spec|
        util_make_exec spec
      end

      util_build_gem @spec
      util_build_gem @user_spec

      @gem = @spec.cache_file
      @user_gem = @user_spec.cache_file

      @installer      = util_installer @spec, @gemhome
      @user_installer = util_installer @user_spec, Gem.user_dir, :user

      Gem::Installer.path_warning = false
    end

util_inst_bindir() click to toggle source

The path where installed executables live

    # File lib/rubygems/installer_test_case.rb, line 112
    def util_inst_bindir
      File.join @gemhome, "bin"
    end

util_installer(spec, gem_home, user=false) click to toggle source

Creates an installer for `spec` that will install into `gem_home`. If `user` is true a user-install will be performed.

    # File lib/rubygems/installer_test_case.rb, line 179
    def util_installer(spec, gem_home, user=false)
      Gem::Installer.at(spec.cache_file,
                         :install_dir => gem_home,
                         :user_install => user)
    end

util_make_exec(spec = @spec, shebang = " click to toggle source

Adds an executable named “executable” to `spec` with the given `shebang`.

The executable is also written to the bin dir in @tmpdir and the installed gem directory for `spec`.

    # File lib/rubygems/installer_test_case.rb, line 122
    def util_make_exec(spec = @spec, shebang = "#!/usr/bin/ruby")
      spec.executables = %w[executable]
      spec.files << 'bin/executable'

      exec_path = spec.bin_file "executable"
      write_file exec_path do |io|
        io.puts shebang
      end

      bin_path = File.join @tempdir, "bin", "executable"
      write_file bin_path do |io|
        io.puts shebang
      end
    end

util_setup_gem(ui = @ui) { |spec| ... } click to toggle source

Builds the @spec gem and returns an installer for it. The built gem includes:

    bin/executable
    lib/code.rb
    ext/a/mkrf_conf.rb

    # File lib/rubygems/installer_test_case.rb, line 145
      def util_setup_gem(ui = @ui) # HACK fix use_ui to make this automatic
        @spec.files << File.join('lib', 'code.rb')
        @spec.extensions << File.join('ext', 'a', 'mkrf_conf.rb')

        Dir.chdir @tempdir do
          FileUtils.mkdir_p 'bin'
          FileUtils.mkdir_p 'lib'
          FileUtils.mkdir_p File.join('ext', 'a')
          File.open File.join('bin', 'executable'), 'w' do |f|
            f.puts "raise 'ran executable'"
          end
          File.open File.join('lib', 'code.rb'), 'w' do |f| f.puts '1' end
          File.open File.join('ext', 'a', 'mkrf_conf.rb'), 'w' do |f|
            f << <<-EOF
              File.open 'Rakefile', 'w' do |rf| rf.puts "task :default" end
            EOF
          end

          yield @spec if block_given?

          use_ui ui do
            FileUtils.rm_f @gem

            @gem = Gem::Package.build @spec
          end
        end

        @installer = Gem::Installer.at @gem
      end