add missing check for disabled output files

AR would AR abort if --out-prefix was used while demultiplexing

Author: MikkelSchubert

src/demultiplexing.cpp

@@ -233,7 +233,10 @@ processes_unidentified::processes_unidentified(const userconfig& config,
   m_output.set_file(read_type::mate_1, output.unidentified_1);
   m_output.set_file(read_type::mate_2, output.unidentified_2);
 
-  m_output.set_step(read_type::mate_1, output.unidentified_1_step);
+  if (output.unidentified_1_step != output_files::disabled) {
+    m_output.set_step(read_type::mate_1, output.unidentified_1_step);
+  }
+
   if (output.unidentified_1_step != output.unidentified_2_step &&
       output.unidentified_2_step != output_files::disabled) {
     m_output.set_step(read_type::mate_2, output.unidentified_2_step);

tests/regression/demultiplexing/bugfixes/unidentified_1_disabled/barcodes.txt

@@ -0,0 +1,2 @@
+sample_1	CTTGCCCT	ACGTTATT
+sample_2	CGCCGATG	TGCACGGG

tests/regression/demultiplexing/bugfixes/unidentified_1_disabled/input_1.fastq

@@ -0,0 +1,4 @@
+@read_150_1/1
+CTTGGGTACTCAGCCTTAGGGTACCACATAGAGTTATCTTATATATTATAATTGCTCTTTTAACATAATTTTAAAAAATTTATATTAAACTTTCTCTGTT
++
+HHHFFFFBBDGGGGGHHHHHGGFCDHGEE<@;+@C792A.CEEGGFFFFDEFGFHHHH@C2;@F;EDDHFDCCC@.DEEEG=BGEDC5>:=2@GFHHHFF

tests/regression/demultiplexing/bugfixes/unidentified_1_disabled/input_2.fastq

@@ -0,0 +1,4 @@
+@read_150_1/2
+AGAAACCACAGTGACTTAAACAGAGAAAGTTTAATATAAATTTTTTAAAATTATGTTAAAAGAGCAATTATAATATATAAGTTAACTCTATGTGGTACCC
++
+HHHFFHHHHHHGFBGHHEFBDG?B=GHHFGFHFHHHHHHHFBFHHHHHGGEEG=DGGGGCHHHHHHHGEA%5ADHHHH=G&&*>><EHHFE@=:51'*5?

tests/regression/demultiplexing/bugfixes/unidentified_1_disabled/test_pe.json

@@ -0,0 +1,20 @@
+{
+    "description": "Missing check resulting in attempted to write disabled read-type",
+    "arguments": [
+        "--out-prefix",
+        "/dev/null",
+        "--barcode-list",
+        "barcodes.txt"
+    ],
+    "files": {
+        "input_1": [
+            "input_1.fastq"
+        ],
+        "input_2": [
+            "input_2.fastq"
+        ],
+        "barcodes": [
+            "barcodes.txt"
+        ]
+    }
+}

tests/regression/demultiplexing/bugfixes/unidentified_1_disabled/test_se.json

@@ -0,0 +1,17 @@
+{
+  "description": "Missing check resulting in attempted to write disabled read-type",
+  "arguments": [
+    "--out-prefix",
+    "/dev/null",
+    "--barcode-list",
+    "barcodes.txt"
+  ],
+  "files": {
+    "input_1": [
+      "input_1.fastq"
+    ],
+    "barcodes": [
+      "barcodes.txt"
+    ]
+  }
+}