// timescale is <time unit> / <time precision>
`timescale 1 ns / 1 ns
module extender_tb();

	parameter M = 4, N = 8;
	logic [M-1:0] in;
	logic [N-1:0] out;
	logic sign;
	
	extender #(M, N) dut (.*);
	
	int i;
	initial begin
		for (i = 0; i < 2**2; i++) begin
			sign = i[0];	in = {i[1], {(M-1){1'b0}}}; #10;
			$display("t = %0t, %b %s %b", $time, in, sign ? "-+->" : "-0->", out);

		end  // for
		$stop;
	end  // initial
	
endmodule  // extender_tb