test(git): add more tests

crates/git/src/lib.rs

@@ -9,6 +9,9 @@ mod repo_details;
 pub mod repository;
 pub mod validate;
 
+#[cfg(test)]
+mod tests;
+
 pub use commit::Commit;
 pub use fetch::fetch;
 pub use generation::Generation;

crates/git/src/tests.rs

@@ -0,0 +1,20 @@
+mod commit {
+    use crate::{commit, Commit};
+
+    #[test]
+    fn should_return_sha() {
+        let sha = commit::Sha::new("sha".to_string());
+        let message = commit::Message::new("message".to_string());
+        let commit = Commit::new(sha.clone(), message);
+
+        assert_eq!(commit.sha(), &sha);
+    }
+    #[test]
+    fn should_return_message() {
+        let sha = commit::Sha::new("sha".to_string());
+        let message = commit::Message::new("message".to_string());
+        let commit = Commit::new(sha, message.clone());
+
+        assert_eq!(commit.message(), &message);
+    }
+}