Add: unit test for empty as_dot

1 files changed, 8 insertions, 0 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 5549694..ef63932 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -189,4 +189,12 @@ mod tests {
         assert_eq!(gotit.name(), "first");
         assert_eq!(gotit.label(), "the first step");
     }
+
+    #[test]
+    fn empty_dot() {
+        let roadmap = Roadmap::new();
+        assert_eq!(roadmap.as_dot().unwrap(), "digraph \"roadmap\" {
+}
+");
+    }
 }