Add usage case to demonstrate 78ed055

Author: pd3

test/query.filter-or.1.out

@@ -0,0 +1,2 @@
+C 1
+D 0

test/query.filter-or.2.out

@@ -0,0 +1 @@
+C 1

test/query.filter-or.vcf

@@ -0,0 +1,6 @@
+##fileformat=VCFv4.2
+##FORMAT=<ID=DP,Number=1,Type=Integer,Description="">
+##contig=<ID=4,assembly=b37,length=191154276>
+##reference=ref.fa
+#CHROM	POS	ID	REF	ALT	QUAL	FILTER	INFO	FORMAT	C	D
+4	1	.	A	.	.	.	.	DP	1	0

test/test.pl

@@ -254,6 +254,8 @@
 run_test(\&test_vcf_query,$opts,in=>'query.header',out=>'query.97.out',args=>q[-H -f'%CHROM %POS[ %SAMPLE %DP %GT]']);
 run_test(\&test_vcf_query,$opts,in=>'query.header',out=>'query.98.out',args=>q[-H -f'%CHROM %POS[ %SAMPLE][ %DP][ %GT]\\n']);
 run_test(\&test_vcf_query,$opts,in=>'query.header',out=>'query.98.out',args=>q[-H -f'%CHROM %POS[ %SAMPLE][ %DP][ %GT]']);
+run_test(\&test_vcf_query,$opts,in=>'query.filter-or',out=>'query.filter-or.1.out',args=>q[-f'[%SAMPLE %DP\\n]' -i'DP=1 || DP=2']);
+run_test(\&test_vcf_query,$opts,in=>'query.filter-or',out=>'query.filter-or.2.out',args=>q[-f'[%SAMPLE %DP\\n]' -i'DP=1 |  DP=2']);
 run_test(\&test_vcf_norm,$opts,in=>'norm',out=>'norm.out',fai=>'norm',args=>'-cx');
 run_test(\&test_vcf_norm,$opts,in=>'norm.split',out=>'norm.split.out',args=>'-m-');
 run_test(\&test_vcf_norm,$opts,in=>'norm.split.2',out=>'norm.split.2.out',args=>'-m-');