--- /dev/null
+read_verilog <<EOT
+module top(input a, b, output [5:0] y);
+and (y[0], a, b);
+nand (y[1], a, b);
+or (y[2], a, b);
+nor (y[3], a, b);
+xor (y[4], a, b);
+xnor (y[5], a, b);
+endmodule
+EOT
+select -assert-count 1 t:$and a:src=<<EOT:2.4-2.17 %i
+select -assert-count 1 t:$and a:src=<<EOT:3.5-3.18 %i
+select -assert-count 1 t:$or a:src=<<EOT:4.3-4.16 %i
+select -assert-count 1 t:$or a:src=<<EOT:5.4-5.17 %i
+select -assert-count 1 t:$xor a:src=<<EOT:6.4-6.17 %i
+select -assert-count 1 t:$xor a:src=<<EOT:7.5-7.18 %i