guest role; guide section ticking

tests/test_plugins/test_guides.py

@@ -559,3 +559,20 @@ def test_renaming_a_guide_does_not_move_its_url(client, db, author):
     assert fixed.status_code == 200
     assert fixed.get_json()['data']['slug'] == slug, 'the URL must not move'
     assert fixed.get_json()['data']['title'] == 'Replacing a marker controller'
+
+def test_a_section_counts_as_something_to_tick():
+    """A reader crosses off a step or a heading to keep their place, so those
+    count towards progress too. A guide converted from an article often has
+    fifty headings and no steps at all, and "0 steps to tick" on a card that is
+    entirely tickable reads as a broken feature."""
+    from plugins.guides.services.blocks import checklistitemcount
+    blocks = [
+        _block('b1', 'heading', text='Before you start'),
+        _block('b2', 'paragraph', text='Not tickable.'),
+        _block('b3', 'step', title='Do the thing'),
+        _block('b4', 'checklist', items=[{'id': 'i1', 'text': 'One'},
+                                         {'id': 'i2', 'text': 'Two'}]),
+        _block('b5', 'code', text='echo hi'),
+    ]
+    # heading + step + two checklist items
+    assert checklistitemcount(blocks) == 4