diff --git a/src/lib.rs b/src/lib.rs
index f1c93ba..4866ddf 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -2,18 +2,86 @@ mod line;
 
 #[cfg(test)]
 mod tests {
-    use super::line::header::{Header, Level};
+    use super::line::{
+        code::Code,
+        header::{Header, Level},
+        link::Link,
+        list::List,
+        quote::Quote,
+    };
 
     #[test]
-    fn h1() {
+    fn line() {
+        // Code
+        match Code::inline_from("```inline```") {
+            Some(inline) => {
+                assert_eq!(inline.value, "inline");
+            }
+            None => assert!(false),
+        };
+
+        match Code::multiline_begin_from("```alt") {
+            Some(mut multiline) => {
+                Code::multiline_continue_from(&mut multiline, "line 1");
+                Code::multiline_continue_from(&mut multiline, "line 2");
+                Code::multiline_continue_from(&mut multiline, "```");
+
+                assert!(multiline.completed);
+                assert_eq!(multiline.alt, Some("alt".into()));
+                assert_eq!(multiline.buffer.len(), 3);
+            }
+            None => assert!(false),
+        };
+
+        // Header
         match Header::from("# H1") {
             Some(h1) => {
-                assert_eq!(h1.level as i32, Level::H1 as i32); // @TODO
+                assert_eq!(h1.level as i8, Level::H1 as i8);
                 assert_eq!(h1.value, "H1");
             }
             None => assert!(false),
         };
-    }
 
-    // @TODO other tags
+        match Header::from("## H2") {
+            Some(h1) => {
+                assert_eq!(h1.level as i8, Level::H2 as i8);
+                assert_eq!(h1.value, "H2");
+            }
+            None => assert!(false),
+        };
+
+        match Header::from("### H3") {
+            Some(h1) => {
+                assert_eq!(h1.level as i8, Level::H3 as i8);
+                assert_eq!(h1.value, "H3");
+            }
+            None => assert!(false),
+        };
+
+        // Link
+        match Link::from("=> gemini://geminiprotocol.net Gemini", None, None) {
+            Some(link) => {
+                assert_eq!(link.alt, Some("Gemini".into()));
+                assert_eq!(link.uri.to_string(), "gemini://geminiprotocol.net");
+                // @TODO timestamp
+            }
+            None => assert!(false),
+        }; // @TODO options
+
+        // List
+        match List::from("* Item") {
+            Some(list) => {
+                assert_eq!(list.value, "Item");
+            }
+            None => assert!(false),
+        };
+
+        // Quote
+        match Quote::from("> Quote") {
+            Some(quote) => {
+                assert_eq!(quote.value, "Quote");
+            }
+            None => assert!(false),
+        };
+    }
 }