block: add test parse_description_list_empty

src/block.rs

@@ -2213,6 +2213,38 @@ mod test {
         );
     }
 
+    #[test]
+    fn parse_description_list_empty() {
+        test_parse!(
+            ":\n",
+            (
+                Enter(Container(List {
+                    kind: ListKind {
+                        ty: Description,
+                        tight: true,
+                    },
+                    marker: ":",
+                })),
+                ":"
+            ),
+            (Enter(Leaf(DescriptionTerm)), ""),
+            (Exit(Leaf(DescriptionTerm)), ""),
+            (Enter(Container(ListItem(ListItemKind::Description))), ":"),
+            (Atom(Blankline), "\n"),
+            (Exit(Container(ListItem(ListItemKind::Description))), ":"),
+            (
+                Exit(Container(List {
+                    kind: ListKind {
+                        ty: Description,
+                        tight: true,
+                    },
+                    marker: ":",
+                })),
+                ":"
+            ),
+        );
+    }
+
     #[test]
     fn parse_table() {
         test_parse!(