Add an assertion point.

needles/anaconda/partitioning/anaconda_part_size_changed.json

@@ -0,0 +1,15 @@
+{
+  "properties": [],
+  "tags": [
+    "anaconda_part_size_changed"
+  ],
+  "area": [
+    {
+      "xpos": 396,
+      "ypos": 146,
+      "width": 71,
+      "height": 22,
+      "type": "match"
+    }
+  ]
+}

tests/disk_custom_resize_lvm.pm

@@ -62,6 +62,8 @@ sub run {
     assert_and_click "anaconda_part_update_settings";
     # give it a second or two to update
     wait_still_screen 2;
+    # check that the size of the partition has been changed.
+    assert_screen "anaconda_part_size_changed";
 
     # Add new /home partition into the emptied space.
     assert_and_click "anaconda_part_add";