add test for preview_image_link in image_scales

src/plone/volto/behaviors/configure.zcml

@@ -17,7 +17,7 @@
       provides=".preview.IPreview"
       />
 
-  <configure zcml:condition="have plone-6">
+  <configure zcml:condition="have plone-60">
     <plone:behavior
         name="volto.preview_image_link"
         title="Preview Image Link"

src/plone/volto/testing.py

@@ -17,6 +17,16 @@
 import plone.volto.coresandbox
 
 
+try:
+    from Products.CMFPlone.factory import PLONE60MARKER
+
+    PLONE60MARKER  # pyflakes
+except ImportError:
+    PLONE_6 = False
+else:
+    PLONE_6 = True
+
+
 class PloneVoltoCoreLayer(PloneSandboxLayer):
 
     defaultBases = (PLONE_APP_CONTENTTYPES_FIXTURE,)

src/plone/volto/tests/test_migrate_to_volto.py

@@ -6,6 +6,7 @@
 from plone.volto.content import FolderishDocument
 from plone.volto.content import FolderishEvent
 from plone.volto.content import FolderishNewsItem
+from plone.volto.testing import PLONE_6
 from plone.volto.testing import PLONE_VOLTO_MIGRATION_FUNCTIONAL_TESTING
 from Products.CMFPlone.utils import get_installer
 
@@ -14,16 +15,6 @@
 import unittest
 
 
-try:
-    from Products.CMFPlone.factory import PLONE60MARKER
-
-    PLONE60MARKER  # pyflakes
-except ImportError:
-    PLONE_6 = False
-else:
-    PLONE_6 = True
-
-
 @unittest.skipIf(
     not PLONE_6,
     "This test is only intended to run for Plone 6",

src/plone/volto/tests/test_preview_link_behavior.py

@@ -0,0 +1,50 @@
+# -*- coding: utf-8 -*-
+
+from plone.namedfile.file import NamedBlobImage
+from plone.restapi.interfaces import ISerializeToJsonSummary
+from plone.volto.testing import PLONE_6
+from plone.volto.testing import PLONE_VOLTO_CORE_INTEGRATION_TESTING
+from z3c.form.interfaces import IDataManager
+from zope.component import getMultiAdapter
+
+import unittest
+
+
+TEST_GIF = (
+    b"GIF89a\x01\x00\x01\x00\x00\xff\x00,\x00\x00\x00\x00\x01\x00\x01\x00\x00\x02\x00;"
+)
+
+
+@unittest.skipIf(
+    not PLONE_6,
+    "This test is only intended to run for Plone 6",
+)
+class TestPreviewLinkBehavior(unittest.TestCase):
+    layer = PLONE_VOLTO_CORE_INTEGRATION_TESTING
+
+    def setUp(self):
+        from plone.volto.behaviors.preview_link import IPreviewLink
+
+        self.app = self.layer["app"]
+        self.portal = self.layer["portal"]
+        self.request = self.layer["request"]
+        self.catalog = self.portal.portal_catalog
+
+        fti = self.portal.portal_types.Document
+        fti.behaviors += ("volto.preview_image_link",)
+
+        self.doc = self.portal[self.portal.invokeFactory("Document", id="doc1")]
+        self.image = self.portal[
+            self.portal.invokeFactory("Image", id="image-1", title="Target image")
+        ]
+        self.image.image = NamedBlobImage(data=TEST_GIF, filename="test.gif")
+        dm = getMultiAdapter(
+            (self.doc, IPreviewLink["preview_image_link"]), IDataManager
+        )
+        dm.set(self.image)
+        self.doc.reindexObject()
+
+    def test_image_scales_includes_preview_image_link(self):
+        brain = self.catalog(UID=self.doc.UID())[0]
+        summary = getMultiAdapter((brain, self.request), ISerializeToJsonSummary)()
+        self.assertIn("preview_image_link", summary["image_scales"])