From e5d43e0cd4989cbabbf942f9c4bffb00d799b4ed Mon Sep 17 00:00:00 2001
From: Yegor Bugayenko <yegor256@gmail.com>
Date: Mon, 9 Jan 2023 06:52:37 +0300
Subject: [PATCH] extra test for empty data

---
 src/ops.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/ops.rs b/src/ops.rs
index 4ff586a..74472af 100644
--- a/src/ops.rs
+++ b/src/ops.rs
@@ -124,6 +124,16 @@ impl Sodg {
     /// ```
     ///
     /// If vertex `v1` is absent, an `Err` will be returned.
+    ///
+    /// If there is no data, an empty `Hex` will be returned, for example:
+    ///
+    /// ```
+    /// use sodg::Hex;
+    /// use sodg::Sodg;
+    /// let mut g = Sodg::empty();
+    /// g.add(42).unwrap();
+    /// assert!(g.data(42).unwrap().is_empty());
+    /// ```
     pub fn data(&mut self, v: u32) -> Result<Hex> {
         let vtx = self
             .vertices