Fixed sample unit test

test/sample/sample_help_withoutVersion.txt

-
-Tool:    bedtools sample (aka sampleFile)
-Summary: Take sample of input file(s) using reservoir sampling algorithm.
-
-Usage:   bedtools sample [OPTIONS] -i <bed/gff/vcf/bam>
-
-WARNING:	The current sample algorithm will hold all requested sample records in memory prior to output.
-		The user must ensure that there is adequate memory for this.
-
-Options: 
-	-n	The number of records to generate.
-		- Default = 1,000,000.
-		- (INTEGER)
-
-	-seed	Supply an integer seed for the shuffling.
-		- By default, the seed is chosen automatically.
-		- (INTEGER)
-
-	-ubam	Write uncompressed BAM output. Default writes compressed BAM.
-
-	-bed	When using BAM input (-abam), write output as BED. The default
-		is to write output in BAM when using -abam.
-
-	-s	Require same strandedness.  That is, only give records
-		that have the same strand. Use '-s forward' or '-s reverse'
-		for forward or reverse strand records, respectively.
-		- By default, records are reported without respect to strand.
-
-	-header	Print the header from the input file prior to results.
-
-Notes: 
-	TBD: Enter other usage notes here.
-

test/sample/test-sample.sh

@@ -30,8 +30,10 @@ $BT random -l 1000 -n 1000 -g human.hg19.genome >> mainFile.bed
 #  Test that help is printed when no args are given
 ############################################################
 echo "    sample.t01...\c"
-$BT sample 2>&1 > /dev/null | grep -iv version > obs
-check obs sample_help_withoutVersion.txt
+echo \
+"***** ERROR: No input file given. Exiting. *****" > exp
+$BT sample 2>&1 > /dev/null | head -2 | tail -1 > obs
+check obs exp
 rm obs