LIBRARY ieee;
USE ieee.std_logic_1164.ALL;

-- Uncomment the following library declaration if using
-- arithmetic functions with Signed or Unsigned values
--USE ieee.numeric_std.ALL;

ENTITY lookAheadTest IS
END lookAheadTest;

ARCHITECTURE behavior OF rippleTest IS

    -- Component Declaration for the Unit Under Test (UUT)

    COMPONENT rippleAdder
    PORT(
         x : IN  std_logic_vector(3 downto 0);
         y : IN  std_logic_vector(3 downto 0);
         Cin : IN  std_logic;
         S : OUT  std_logic_vector(3 downto 0);
         Cout : OUT  std_logic;
         control : IN  std_logic
        );
    END COMPONENT;


   --Inputs
   signal x : std_logic_vector(3 downto 0) := "0000";
   signal y : std_logic_vector(3 downto 0) := "0000";
   signal Cin : std_logic := '0';
   signal control : std_logic := '0';

 	--Outputs
   signal S : std_logic_vector(3 downto 0);
   signal Cout : std_logic;
   -- No clocks detected in port list. Replace <clock> below with
   -- appropriate port name

   --constant <clock>_period : time := 10 ns;

BEGIN

	-- Instantiate the Unit Under Test (UUT)
   uut: rippleAdder PORT MAP (
          x => x,
          y => y,
          Cin => Cin,
          S => S,
          Cout => Cout,
          control => control
        );



   -- Stimulus process
   stim_proc: process
   begin
		control <= '0' ;
      wait for 100 ns ;
		x <= "0111" ;
		y <= "0111" ;
		Cin <= '0' ;
		wait for 100 ns ;
		x <= "1101" ;
		y <= "1101" ;
		Cin <= '0' ;
		wait for 100 ns ;
		x <= "0100" ;
		y <= "1010" ;
		Cin <= '1' ;
		wait for 100 ns ;
		x <= "1111" ;
		y <= "0000" ;
		Cin <= '0' ;
		wait for 100 ns ;
		x <= "1010" ;
		y <= "0001" ;
		Cin <= '0' ;
		wait for 100 ns ;
		x <= "0010" ;
		y <= "1011" ;
		Cin <= '1' ;
		wait for 100 ns ;
		x <= "0000" ;
		y <= "0000" ;
		Cin <= '0' ;
		wait for 100 ns ;
		x <= "1111" ;
		y <= "1111" ;
		Cin <= '1' ;

		control <= '1' ;
      wait for 100 ns ;
		x <= "0101" ;
		y <= "1001" ;
		Cin <= '1' ;
		wait for 100 ns ;
		x <= "0011" ;
		y <= "1100" ;
		Cin <= '0' ;
		wait for 100 ns ;
		x <= "0100" ;
		y <= "1010" ;
		Cin <= '1' ;
		wait for 100 ns ;
		x <= "1111" ;
		y <= "0000" ;
		Cin <= '0' ;
		wait for 100 ns ;
		x <= "1010" ;
		y <= "0001" ;
		Cin <= '0' ;
		wait for 100 ns ;
		x <= "0010" ;
		y <= "1011" ;
		Cin <= '1' ;
		wait for 100 ns ;
		x <= "0000" ;
		y <= "0000" ;
		Cin <= '0' ;
		wait for 100 ns ;
		x <= "1001" ;
		y <= "0001" ;
		Cin <= '1' ;
		wait for 100 ns ;
		x <= "1111" ;
		y <= "1111" ;
		Cin <= '1' ;
      wait for 100 ns ;
		control <= '0' ;
		x <= "1101" ;
		y <= "1101" ;
		Cin <= '0' ;
		wait for 100 ns ;
		x <= "0111" ;
		y <= "0111" ;
		Cin <= '0' ;
   end process;

END;