require_relative "../helper"

module Risc
  class TestCompilerBuilder < MiniTest::Test
    include Parfait::MethodHelper
    def setup
      Parfait.boot!(Parfait.default_test_options)
      @method = SlotMachine::SlotCollection.compiler_for( :Space , :main,{},{}).callable
      @compiler = Risc::MethodCompiler.new( @method , SlotMachine::Label.new( "source_name", "return_label"))
      @builder  = @compiler.builder(@method)
    end
    def test_inserts_built
      r1 = RegisterValue.new(:r1 , :Space)
      @builder.build{ space! << r1 }
      assert_equal Transfer , @compiler.risc_instructions.next.class
      assert_equal RegisterValue ,  @builder.space.class
    end
    def test_loads
      @builder.build{ space! << Parfait.object_space }
      assert_equal LoadConstant , @compiler.risc_instructions.next.class
      assert_equal RegisterValue ,  @builder.space.class
    end
    def test_two
      @builder.build{ space! << Parfait.object_space ; integer! << 1}
      assert_equal LoadConstant , @compiler.risc_instructions.next.class
      assert_equal LoadData , @compiler.risc_instructions.next(2).class
    end
    def test_swap
      test_two
      @builder.swap_names( :space , :integer)
      assert_equal :Integer ,  @builder.space.type.class_name
      assert_equal :Space ,  @builder.integer.type.class_name
    end
    def test_prepare_int
      int = @builder.prepare_int_return
      assert_raises { @builder.integer_tmp}
    end
    def test_allocate_returns
      int = @builder.allocate_int
      assert_equal :r1 , int.symbol
    end
    def test_allocate_len
      int = @builder.allocate_int
      assert_equal 23 , @builder.compiler.risc_instructions.length
    end
  end
end