--- /dev/null
+#!/bin/bash
+
+source "$BP_DIR/bp_test/lib/test.sh"
+
+run "$bp -I $in -s '\d' -r '' -O $tmp"
+assert_no_diff $tmp $out.1
+clean
+
+run "$bp -I $in -k SEQ -s 'n' -r '' -O $tmp"
+assert_no_diff $tmp $out.2
+clean
+
+run "$bp -I $in -k SEQ -s 'n' -r '' -i -O $tmp"
+assert_no_diff $tmp $out.3
+clean
+
+run "$bp -I $in -k SEQ -s 'n' -r '' -i -g -O $tmp"
+assert_no_diff $tmp $out.4
+clean
+
+run "$bp -I $in -k SEQ -s 'n{3,}' -r '' -i -g -O $tmp"
+assert_no_diff $tmp $out.5
+clean