first test and needed dependency to diesel added (test not complete yet)

model/sqlite3/Cargo.toml

@@ -7,3 +7,4 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+diesel = { version = "*", features = ["sqlite"] }

model/sqlite3/src/lib.rs

@@ -1,7 +1,29 @@
+extern crate diesel;
+
+pub mod db;
+
 #[cfg(test)]
 mod tests {
+    use diesel::Connection;
+    use diesel::SqliteConnection;
+
+    fn establish_connection() -> SqliteConnection {
+        let database_url = "test.db";
+        SqliteConnection::establish(&database_url)
+            .unwrap_or_else(|_| panic!("Error connecting to {}", database_url))
+    }
+
     #[test]
     fn it_works() {
         assert_eq!(2 + 2, 4);
     }
+
+    #[test]
+    fn list_users() {
+        use schema::dsl::*;
+        let connection = establish_connection();
+        //	db::schema::
+
+        //   users.loa
+    }
 }