Add tests for the list model

src/models/list.rs

@@ -82,3 +82,54 @@ impl List {
         lists
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn loads_all_lists() {
+        let lists = List::load_all(Some("test"));
+        let list_ids: Vec<&str> = lists.iter()
+            .map(|list| list.id.as_ref()).collect();
+        assert_eq!(list_ids, vec!["test", "updatable"]);
+    }
+
+    #[test]
+    fn converts_to_html() {
+        let lists = List::load_all(Some("test"));
+        let list = lists.iter()
+            .find(|list| list.id == "test")
+            .unwrap();
+        assert_eq!(list.to_html(), r#"<p>This is a test list</p>
+<ul>
+<li>One</li>
+<li>Two</li>
+<li>Three</li>
+</ul>
+"#);
+    }
+
+    #[test]
+    fn updates_data() {
+        let mut lists = List::load_all(Some("test"));
+        let list = lists.iter_mut()
+            .find(|list| list.id == "updatable")
+            .unwrap();
+
+        let new_data = match list.data.as_ref() {
+            "contentA" => "contentB",
+            _          => "contentA"
+        };
+        list.update_data(&String::from(new_data));
+        assert_eq!(list.data, new_data);
+
+        // Verify that the data is written to the file of the list by
+        // loading them again
+        let lists = List::load_all(Some("test"));
+        let list = lists.iter()
+            .find(|list| list.id == "updatable")
+            .unwrap();
+        assert_eq!(list.data, new_data);
+    }
+}