Turn cache entry into writable bytes.

src/morethantext/mod.rs

@@ -19,9 +19,18 @@ enum CacheEntry {
 impl CacheEntry {
     fn entry_type(&self) -> String {
         match self {
-            CacheEntry::Raw(_) => "raw".to_string(),
+            CacheEntry::Raw(_) => "Raw".to_string(),
         }
     }
+
+    fn to_bytes(&self) -> Vec<u8> {
+        let mut output = self.entry_type().into_bytes();
+        output.push(0);
+        match self {
+            CacheEntry::Raw(s) => output.append(&mut s.as_bytes().to_vec()),
+        }
+        return output;
+    }
 }
 
 impl fmt::Display for CacheEntry {
@@ -214,8 +223,19 @@ mod cache_entry {
     use super::*;
 
     #[test]
-    fn raw_type() {
+    fn raw_get_type() {
         let holder = CacheEntry::Raw("nothing important".to_string());
-        assert_eq!(holder.entry_type(), "raw");
+        assert_eq!(holder.entry_type(), "Raw");
+    }
+
+    #[test]
+    fn raw_get_bytes() {
+        let data = "addams";
+        let holder = CacheEntry::Raw(data.to_string());
+        let mut expected = holder.entry_type().into_bytes();
+        expected.push(0);
+        expected.append(&mut data.as_bytes().to_vec());
+        let output = holder.to_bytes();
+        assert_eq!(output, expected);
     }
 }