You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: test_ractor.rb
    path of file: ./repos/truffleruby/test/bootstraptest
    
    the code of the file until where you have to start completion: # Ractor.current returns a current ractor
assert_equal 'Ractor', %q{
  Ractor.current.class
}

# Ractor.new returns new Ractor
assert_equal 'Ractor', %q{
  Ractor.new{}.class
}

# Ractor.allocate is not supported
assert_equal "[:ok, :ok]", %q{
  rs = []
  begin
    Ractor.allocate
  rescue => e
    rs << :ok if e.message == 'allocator undefined for Ractor'
  end

  begin
    Ractor.new{}.dup
  rescue
    rs << :ok if e.message == 'allocator undefined for Ractor'
  end

  rs
}

# A Ractor can have a name
assert_equal 'test-name', %q{
  r = Ractor.new name: 'test-name' do
  end
  r.name
}

# If Ractor doesn't have a name, Ractor#name returns nil.
assert_equal 'nil', %q{
  r = Ractor.new do
  end
  r.name.inspect
}

# Raises exceptions if initialize with an invalid name
assert_equal 'ok', %q{
  begin
    r = Ractor.new(name: [{}]) {}
  rescue TypeError => e
    'ok'
  end
}

# Ractor.new must call with a block
assert_equal "must be called with a block", %q{
  begin
    Ractor.new
  rescue ArgumentError => e
    e.message
  end
}

# Ractor#inspect
# Return only id and status for main ractor
assert_equal "#<Ractor:#1 running>", %q{
  Ractor.current.inspect
}

# Return id, loc, and status for no-name ractor
assert_match /^#<Ractor:#([^ ]*?) .+:[0-9]+ terminated>$/, %q{
  r = Ractor.new { '' }
  r.take
  sleep 0.1 until r.inspect =~ /terminated/
  r.inspect
}

# Return id, name, loc, and status for named ractor
assert_match /^#<Ractor:#([^ ]*?) Test Ractor .+:[0-9]+ terminated>$/, %q{
  r = Ractor.new(name: 'Test Ractor') { '' }
  r.take
  sleep 0.1 until r.inspect =~ /terminated/
  r.inspect
}

# A return value of a 
    
    def self.int = @int
    def self.str = @str
    def self.fstr = @fstr
  end

  module M
    @int = 2
    @str = '-2000'.dup
    @fstr = '200'.freeze

    def self.int = @int
    def self.str = @str
    def self.fstr = @fstr
  end

  a = Ractor.new{ C.int }.take
  b = Ractor.new do
    C.str.to_i
  rescue Ractor::IsolationError
    10
  end.take
  c = Ractor.new do
    C.fstr.to_i
  end.take

  d = Ractor.new{ M.int }.take
  e = Ractor.new do
    M.str.to_i
  rescue Ractor::IsolationError
    20
  end.take
  f = Ractor.new do
    M.fstr.to_i
  end.take


  # 1 + 10 + 100 + 2 + 20 + 200
  a + b + c + d + e + f
}

# cvar in shareable-objects are not allowed to access from non-main Ractor
assert_equal 'can not access class variables from non-main Ractors', %q{
  class C
    @@cv = 'str'
  end

  r = Ractor.new do
    class C
      p @@cv
    end
  end

  begin
    r.take
  rescue Ractor::RemoteError => e
    e.cause.message
  end
}

# also cached cvar in shareable-objects are not allowed to access from non-main Ractor
assert_equal 'can not access class variables from non-main Ractors', %q{
  class C
    @@cv = 'str'
    def self.cv
      @@cv
    end
  end

  C.cv # cache

  r = Ractor.new do
    C.cv
  end

  begin
    r.take
  rescue Ractor::RemoteError => e
    e.cause.message
  end
}

# Getting non-shareable objects via constants by other Ractors is not allowed
assert_equal 'can not access non-shareable objects in constant C::CONST by non-main Ractor.', %q{
  class C
    CONST = 'str'
  end
  r = Ractor.new do
    C::CONST
  end
  begin
    r.take
  rescue Ractor::RemoteError => e
    e.cause.message
  end
}

# Constant cache should care about non-sharable constants
assert_equal "can not access non-shareable objects in constant Object::STR by non-main Ractor.", %q{
  STR = "hello"
  def str; STR; end
  s = str() # fill const cache
  begin
    Ractor.new{ str() }.take
  rescue Ractor::RemoteError => e
    e.cause.message
  end
}

# Setting non-shareable objects into constants by other Ractors is not allowed
assert_equal 'can not set constants with non-shareable objects by non-main Ractors', %q{
  class C
  end