Support ack3-only

Author: petdance

t/ack-1.yaml

@@ -1,5 +1,6 @@
 ---
 name: All the Montresors
+ack3-only: true
 args: Montresor -h t/text
 stdout: |
   the catacombs of the Montresors.
@@ -8,29 +9,34 @@ stdout: |
 
 ---
 name: Stop at one Montresor
+ack3-only: true
 args: Montresor -1 -h t/text
 stdout: |
   the catacombs of the Montresors.
 
 ---
 name: With dash v
+ack3-only: true
 args: c -1 -h -v t/text/raven.txt
 stdout: '    Only this and nothing more."'
 
 ---
 name: Dash f
+ack3-only: true
 args: -1 -f --sort-files t/swamp
 stdout:
   t/swamp/0
 
 ---
 name: Dash g
+ack3-only: true
 args: -1 -g fresh t/
 stdout:
   t/swamp/fresh.css
 
 ---
 name: Dash l
+ack3-only: true
 args: -1 -l --sort-files the t/text
 stdout: |
   t/text/amontillado.txt

t/run_yaml_test.py

@@ -22,12 +22,19 @@ def test_all_yaml_files():
     """
     filenames = sorted(glob.glob('t/*.yaml'))
     for filename in filenames:
-        logger.info('YAML: %s' % filename)
+        skipped_ack3_only = 0
+        logger.info(f'YAML: {filename}')
         with open(filename, 'r', encoding='UTF-8') as f:
             cases = yaml.load_all(f, yaml.FullLoader)
             for case in cases:
                 case = massage_case(case)
-                run_case(case)
+                if case.get('ack3-only', False):
+                    skipped_ack3_only += 1
+                else:
+                    run_case(case)
+            if skipped_ack3_only:
+                logger.info(f'    Skipped {skipped_ack3_only} ack3-only case(s)')
+
 
 
 def massage_case(case: dict):