Add a test for State

Cargo.lock

@@ -595,6 +595,7 @@ dependencies = [
  "lazy_static 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "libsqlite3-sys 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "maplit 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "matches 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "num 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)",
  "percent-encoding 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "pulldown-cmark 0.0.11 (registry+https://github.com/rust-lang/crates.io-index)",

Cargo.toml

@@ -8,6 +8,9 @@ license = "GPL-3.0"
 [profile.release]
 panic = "abort"
 
+[dev-dependencies]
+matches = "0.1"
+
 [dependencies]
 bart = "0.1.4"
 bart_derive = "0.1.4"

src/db.rs

@@ -30,3 +30,14 @@ pub fn create_pool<S: Into<String>>(connection_string: S) -> Result<Pool<Connect
 
     Ok(pool)
 }
+
+#[cfg(test)]
+pub fn test_connection() -> SqliteConnection {
+    let mut conn = SqliteConnection::establish(":memory:")
+        .expect("SQLite should be able to create an in-memory database");
+
+    SqliteInitializer.on_acquire(&mut conn).unwrap();
+    embedded_migrations::run(&conn).unwrap();
+
+    conn
+}

src/lib.rs

@@ -1,5 +1,7 @@
 #![recursion_limit="128"] // for diesel's infer_schema!
 
+#[cfg(test)] #[macro_use] extern crate matches;
+
 #[macro_use] extern crate bart_derive;
 #[macro_use] extern crate codegen;
 #[macro_use] extern crate diesel_codegen;

src/state.rs

@@ -384,3 +384,17 @@ impl State {
         self.execute(move |state| state.search_query(query_string, limit, offset, snippet_size))
     }
 }
+
+#[cfg(test)]
+mod test {
+    use super::*;
+    use db;
+
+    #[test]
+    fn get_article_slug() {
+        let db = db::test_connection();
+        let state = SyncState::new(&db);
+
+        assert_matches!(state.get_article_slug(0), Ok(None));
+    }
+}