TSB_tb.v

module tritstatebuffer_tb;
    reg i,cnt;
    wire z;
    tristatebuffer uut(.i(i),.cnt(cnt),.z(z));
    initial
        begin
        i=0;cnt=0;
        #100;
        i=0;cnt=1;
        #100;
        i=1;cnt=0;
        #100;
        i=1;cnt=1;
        #100;
        end
endmodule