Update testing to check 0 value.

workflow/tests/test_pool_and_psuedoreplicate.py

@@ -85,7 +85,7 @@ def test_single_control(design_experiment_3):
     shutil.copy(test_design_path + 'B_1.bedpe.gz', cwd)
     shutil.copy(test_design_path + 'A_1.tagAlign.gz', cwd)
     single_control = pool_and_psuedoreplicate.generate_design('true', 1.2, design_experiment_3, cwd, 1, 1)
-    assert 'B_1.tagAlign.gz' in single_control['control_tag_align'].unique()[1]
+    assert 'B_1.tagAlign.gz' in single_control['control_tag_align'].unique()[0]
 
 
 @pytest.mark.singleend