add proper stubs and tests for local star_*_igenomes modules

Author: maxulysse

modules/local/star_align_igenomes/main.nf

@@ -76,6 +76,8 @@ process STAR_ALIGN_IGENOMES {
     stub:
     def prefix = task.ext.prefix ?: "${meta.id}"
     """
+    echo "" | gzip > ${prefix}.unmapped_1.fastq.gz
+    echo "" | gzip > ${prefix}.unmapped_2.fastq.gz
     touch ${prefix}Xd.out.bam
     touch ${prefix}.Log.final.out
     touch ${prefix}.Log.out
@@ -84,8 +86,6 @@ process STAR_ALIGN_IGENOMES {
     touch ${prefix}.toTranscriptome.out.bam
     touch ${prefix}.Aligned.unsort.out.bam
     touch ${prefix}.Aligned.sortedByCoord.out.bam
-    touch ${prefix}.unmapped_1.fastq.gz
-    touch ${prefix}.unmapped_2.fastq.gz
     touch ${prefix}.tab
     touch ${prefix}.SJ.out.tab
     touch ${prefix}.ReadsPerGene.out.tab