Add automated test for testing the link target code.

src/intermediate/regular_link.rs

@@ -42,7 +42,7 @@ intermediate!(
     }
 );
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, PartialEq)]
 pub(crate) enum LinkTarget {
     Raw(String),
     Post {
@@ -124,3 +124,27 @@ impl LinkTarget {
         }
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use std::sync::Arc;
+    use std::sync::Mutex;
+
+    use crate::intermediate::Registry;
+
+    use super::*;
+
+    #[test]
+    fn link_target_raw() -> Result<(), CustomError> {
+        let registry = Registry::new();
+        let registry = Arc::new(Mutex::new(registry));
+        let intermediate_context = IntermediateContext::new(registry)?;
+        for inp in ["https://test.example/foo"] {
+            assert_eq!(
+                LinkTarget::from_string(intermediate_context.clone(), inp.to_owned())?,
+                LinkTarget::Raw(inp.to_owned())
+            );
+        }
+        Ok(())
+    }
+}