Add regression test for tafia#868

failures:
    issue868

Author: Mingun

tests/serde-issues.rs

@@ -570,3 +570,60 @@ fn issue683() {
         }
     );
 }
+
+/// Regression test for https://github.com/tafia/quick-xml/issues/868.
+#[test]
+fn issue868() {
+    #[derive(Debug, PartialEq, Deserialize)]
+    #[serde(rename = "root")]
+    pub struct Root {
+        #[serde(rename = "key")]
+        pub key: Key,
+    }
+
+    #[derive(Debug, PartialEq, Deserialize)]
+    #[serde(rename = "key")]
+    pub struct Key {
+        #[serde(rename = "value")]
+        pub values: Option<Vec<Value>>,
+    }
+
+    #[derive(Debug, PartialEq, Deserialize)]
+    #[serde(rename = "Value")]
+    pub struct Value {
+        #[serde(rename = "@id")]
+        pub id: String,
+
+        #[serde(rename = "$text")]
+        pub text: Option<String>,
+    }
+    let xml = r#"
+        <?xml version="1.0" encoding="utf-8"?>
+        <root>
+            <key>
+                <value id="1">text1</value>
+                <value id="2">text2</value>
+                <value id="3">text3</value>
+                <value id="4">text4</value>d
+                <value id="5">text5</value>
+                <value id="6">text6</value>
+            </key>
+        </root>"#;
+    let result = quick_xml::de::from_str::<Root>(xml);
+    dbg!(&result);
+    assert_eq!(
+        result.unwrap(),
+        Root {
+            key: Key {
+                values: Some(vec![
+                    Value { id: "1".to_string(), text: Some("text1".to_string()) },
+                    Value { id: "2".to_string(), text: Some("text2".to_string()) },
+                    Value { id: "3".to_string(), text: Some("text3".to_string()) },
+                    Value { id: "4".to_string(), text: Some("text4".to_string()) },
+                    Value { id: "5".to_string(), text: Some("text5".to_string()) },
+                    Value { id: "6".to_string(), text: Some("text6".to_string()) },
+                ]),
+            },
+        }
+    );
+}