fix errors

Author: antgonza

qiita_db/processing_job.py

@@ -1386,6 +1386,8 @@ def _complete_artifact_transformation(self, artifacts_data):
 
             # Submit m validator jobs as n lists of jobs
             n = qiita_config.job_scheduler_dependency_q_cnt
+            if n is None:
+                n = 2
 
             # taken from:
             # https://www.geeksforgeeks.org/break-list-chunks-size-n-python/

qiita_db/test/test_processing_job.py

@@ -870,7 +870,7 @@ def test_notification_mail_generation(self):
         # messages of type 'error'.
         obs = self.tester1._generate_notification_message('error', None)
 
-        exp = {'subject': ('Split libraries FASTQ: queued '
+        exp = {'subject': ('Split libraries FASTQ: error '
                            '(063e553b-327c-4818-ab4a-adfe58e49860)'),
                'message': ('Processing Job: Split libraries FASTQ\n'
                            f'{qiita_config.base_url}/study/description/1'
@@ -880,7 +880,7 @@ def test_notification_mail_generation(self):
 
         obs = self.tester1._generate_notification_message('error',
                                                           'An Error Message')
-        exp = {'subject': ('Split libraries FASTQ : error '
+        exp = {'subject': ('Split libraries FASTQ: error '
                            '(063e553b-327c-4818-ab4a-adfe58e49860)'),
                'message': ('Processing Job: Split libraries FASTQ\n'
                            f'{qiita_config.base_url}/study/description/1\n'
@@ -891,7 +891,7 @@ def test_notification_mail_generation(self):
         # The inclusion of an error message has no effect on other valid
         # status types e.g. 'running'.
         obs = self.tester1._generate_notification_message('running', None)
-        exp = {'subject': ('Split libraries FASTQ : running '
+        exp = {'subject': ('Split libraries FASTQ: running '
                            '(063e553b-327c-4818-ab4a-adfe58e49860)'),
                'message': ('Processing Job: Split libraries FASTQ\n'
                            f'{qiita_config.base_url}/study/description/1\n'
@@ -900,7 +900,7 @@ def test_notification_mail_generation(self):
         self.assertDictEqual(obs, exp)
 
         obs = self.tester1._generate_notification_message('running', 'Yahoo!')
-        exp = {'subject': ('Split libraries FASTQ : running '
+        exp = {'subject': ('Split libraries FASTQ: running '
                            '(063e553b-327c-4818-ab4a-adfe58e49860)'),
                'message': ('Processing Job: Split libraries FASTQ\n'
                            f'{qiita_config.base_url}/study/description/1\n'
@@ -912,7 +912,7 @@ def test_notification_mail_generation(self):
         jid = '8a7a8461-e8a1-4b4e-a428-1bc2f4d3ebd0'
         pj = qdb.processing_job.ProcessingJob(jid)
         obs = pj._generate_notification_message('running', 'Yahoo!')
-        exp = {'subject': 'Single Rarefaction : running '
+        exp = {'subject': 'Single Rarefaction: running '
                           '(8a7a8461-e8a1-4b4e-a428-1bc2f4d3ebd0)',
                'message': 'Analysis Job Single Rarefaction\n'
                           f'{qiita_config.base_url}/analysis/description/1/\n'