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: multiple_assignment_test.rb
    path of file: ./repos/steep/test
    
    the code of the file until where you have to start completion: require_relative "test_helper"

class MultipleAssignmentTest < Minitest::Test
  include Te
    
  def test_tuple_assignment
    with_checker do
      source = parse_ruby("a, *b, c = _")
      mlhs, rhs = source.node.children

      masgn = MultipleAssignment.new()
      asgns = masgn.expand(mlhs, parse_type("[::Integer, ::String, ::Symbol]"), false)

      assert_equal(
        MultipleAssignment::Assignments.new(
          rhs_type: parse_type("[::Integer, ::String, ::Symbol]"),
          optional: false,
          leading_assignments: [[node(:lvasgn, :a), parse_type("::Integer")]],
          trailing_assignments: [[node(:lvasgn, :c), parse_type("::Symbol")]],
          splat_assignment: [node(:splat, node(:lvasgn, :b)), parse_type("[::String]")]
        ),
        asgns
      )
    end
  end