[#1] Blog metadata can be stored using serde.

Created the initial blog data, posts and authors, and allows it to
be stored using serde.

tests/serde.rs

@@ -0,0 +1,84 @@
+use tavern::{Adventurer, Tale, Tavern};
+
+
+
+fn generate_tavern() -> Tavern
+{
+   let author: Adventurer = Adventurer
+   {
+      name: String::from("Jason Smith"),
+      handle: String::from("myrddin"),
+      profile: String::from("https://cybermages.tech/about/myrddin"),
+      image: String::from("https://cybermages.tech/about/myrddin/pic"),
+      blurb: String::from("I love code!")
+   };
+
+   let tale: Tale = Tale
+   {
+      title: String::from("Test post"),
+      slug: String::from("test_post"),
+      author: author.handle.clone(),
+      summary: String::from("The Moon is made of cheese!"),
+      tags: vec![String::from("Space"), String::from("Cheese")],
+      content: std::path::PathBuf::from("posts/test_post.md")
+   };
+
+   Tavern { tales: vec![tale], authors: vec![author]}
+}
+
+fn cleanup_temp_file(path: &std::path::PathBuf)
+{
+   if path.exists()
+   {
+      let _ = std::fs::remove_file(path);
+   }
+}
+
+
+#[test]
+fn to_file()
+{
+   let tavern = generate_tavern();
+
+   let toml_string = toml::to_string_pretty(&tavern)
+      .expect("Serialization to TOML should succeed");
+
+   // Save the TOML to a temporary file.
+   let mut path = std::env::temp_dir();
+   path.push("tavern_test_out.toml");
+   std::fs::write(&path, &toml_string)
+      .expect("Failed to write TOML to file");
+
+   cleanup_temp_file(&path);
+}
+
+#[test]
+fn from_file()
+{
+   let tavern = generate_tavern();
+
+   let toml_string = toml::to_string_pretty(&tavern)
+      .expect("Serialization to TOML should succeed");
+
+   // Save the TOML to a temporary file.
+   let mut path = std::env::temp_dir();
+   path.push("tavern_test_in.toml");
+   std::fs::write(&path, &toml_string)
+      .expect("Failed to write TOML to file");
+
+   // Read the previously written TOML file
+   let toml_data = std::fs::read_to_string(&path)
+      .expect("Failed to read TOML file");
+
+   // Deserialize it
+   let tavern: Tavern = toml::from_str(&toml_data)
+      .expect("Failed to parse TOML");
+
+   // Assert some known values to make this a real test
+   let tale = &tavern.tales[0];
+   assert_eq!(tale.title, "Test post");
+   assert_eq!(tale.slug, "test_post");
+   assert_eq!(tale.author, "myrddin");
+
+   cleanup_temp_file(&path);
+}