Made testbench

lab2CA.srcs/sources_1/new/BasicModules.v

@@ -969,6 +969,29 @@ module sign_extend_2bit(
 
 endmodule
 
+//testbench
+module sign_extend_2bit_tb();
+    reg [1:0] A;
+    wire [8:0] B;
+
+    sign_extend_2bit tb0(
+        .A(A),
+        .B(B));
+
+    initial begin
+        A = 2'b00;
+        #5
+        A = 2'b01;
+        #5
+        A = 2'b10;
+        #5
+        A = 2'b11;
+        #5
+        $finish;
+
+    end
+endmodule
+
 module sub_9bit(
     input wire [8:0] A,
     input wire [8:0] B,