Fix 500

CHANGES.rst

@@ -18,7 +18,10 @@ New features:
 
 Bug fixes:
 
-- ...
+- vBoolean can now be used as an parameter
+  Ref: #501
+  Fixes: #500
+  [jacadzaca]
 
 
 5.0.3 (2022-11-23)

src/icalendar/parser.py

@@ -102,7 +102,10 @@ def param_value(value):
     """
     if isinstance(value, SEQUENCE_TYPES):
         return q_join(value)
-    return dquote(value)
+    elif isinstance(value, str):
+        return dquote(value)
+    else:
+        return dquote(value.to_ical().decode(DEFAULT_ENCODING))
 
 
 # Could be improved

src/icalendar/tests/events/event_with_rsvp.ics

@@ -0,0 +1,3 @@
+BEGIN:VEVENT
+ATTENDEE;RSVP=TRUE:mailto:someone@example.com
+END:VEVENT

src/icalendar/tests/test_issue_500_vboolean_for_parameter.py

@@ -0,0 +1,9 @@
+from icalendar import Event, vBoolean, vCalAddress
+
+def test_vBoolean_can_be_used_as_parameter_issue_500(events):
+    '''https://github.com/collective/icalendar/issues/500'''
+    attendee = vCalAddress(f'mailto:someone@example.com')
+    attendee.params['rsvp'] = vBoolean(True)
+    event = Event()
+    event.add('attendee', attendee)
+    assert event.to_ical() == events.event_with_rsvp.raw_ics

tox.ini

@@ -32,7 +32,7 @@ commands_pre =
 # Install Plone and explicitly the single package that uses icalendar, plus the test runner.
     pip install Plone plone.app.event[test] zope.testrunner -c https://dist.plone.org/release/6.0-dev/constraints.txt
 # Install the dev version of the package, mostly so we can safely point to the path with the tests.
-    pip install -e "git+https://github.com/plone/plone.app.event.git#egg=plone.app.event"
+    pip install -e "git+https://github.com/plone/plone.app.event.git\#egg=plone.app.event"
 # icalendar is pinned in the constraints, but we want the current dev version.
     pip install -e {toxinidir}
 commands =