module mux_tb(); logic [31:0] MUX_A, MUX_B; logic MUX_Option; logic [31:0] MUX_S; MUX MUX( .A(MUX_A), .B(MUX_B), .S(MUX_S), .option(MUX_Option) ); initial begin MUX_A = 5; MUX_B = 3; MUX_Option = 0; #1 $display("Estado ", MUX_S); MUX_Option = 1; #1 $display("Estado ", MUX_S); end endmodule