Add in place holders for testing trim reads.

workflow/tests/test_trim_reads.py

+#!/usr/bin/env python3
+
+import pytest
+import os
+import gzip
+
+
+def test_trim_reads_singleend():
+    # assert os.path.getsize('sample1_R1.fastq.gz') != os.path.getsize('sample1_R1.trim.fastq.gz')
+    # check the size of the lines using
+    # a = sum(1 for _ in gzip.open('input_2.small_R1.fastq.gz'))
+    pass
+
+
+def test_trim_reads_pairedend():
+    # Do the same thing for paired end data
+    pass