tests: make sure all advertised keys are ok for users sourced items (#67955)

tests/test_formdata.py

@@ -1046,6 +1046,46 @@ def test_lazy_formdata_live_user_item(pub, local_user):
     assert 'form_var_foo_live_email' in context.get_flat_keys()
 
 
+def test_lazy_formdata_user_items(pub, local_user):
+    NamedDataSource.wipe()
+    datasource = NamedDataSource(name='foo')
+    datasource.data_source = {'type': 'wcs:users'}
+    datasource.store()
+
+    user2 = get_publisher().user_class()
+    user2.name = 'Second User'
+    user2.email = 'second.user@example.com'
+    user2.store()
+
+    formdef = FormDef()
+    formdef.name = 'foobar'
+    formdef.fields = [
+        fields.ItemsField(
+            id='0',
+            label='users',
+            type='items',
+            varname='foo',
+            data_source={'type': 'foo'},
+        )
+    ]
+    formdef.store()
+
+    formdata = formdef.data_class()()
+    formdata.data = {
+        '0': [str(local_user.id), str(user2.id)],
+    }
+    formdata.data['0_display'] = formdef.fields[0].store_display_value(formdata.data, '0')
+    formdata.data['0_structured'] = formdef.fields[0].store_structured_value(formdata.data, '0')
+    assert formdata.data['0_display'] == 'Jean Darmette, Second User'
+
+    pub.substitutions.feed(pub)
+    pub.substitutions.feed(formdef)
+    pub.substitutions.feed(formdata)
+
+    context = pub.substitutions.get_context_variables(mode='lazy')
+    assert [context[k] for k in context.get_flat_keys()]
+
+
 def test_lazy_formdata_queryset(pub, variable_test_data):
     lazy_formdata = variable_test_data
     data_class = lazy_formdata._formdef.data_class()