100 exercises to learn Rust

exercises/03_ticket_v1/02_validation/src/lib.rs

@@ -0,0 +1,73 @@
+struct Ticket {
+    title: String,
+    description: String,
+    status: String,
+}
+
+impl Ticket {
+    // TODO: implement the `new` function.
+    //  The following requirements should be met:
+    //   - Only `To-Do`, `In Progress`, and `Done` statuses are allowed.
+    //   - The `title` and `description` fields should not be empty.
+    //   - the `title` should be at most 50 characters long.
+    //   - the `description` should be at most 500 characters long.
+    //  The method should panic if any of the requirements are not met.
+    //
+    // You'll have to use what you learned in the previous exercises,
+    // as well as some `String` methods. Use the documentation of Rust's standard library
+    // to find the most appropriate options -> https://doc.rust-lang.org/std/string/struct.String.html
+    fn new(title: String, description: String, status: String) -> Self {
+        todo!();
+        Self {
+            title,
+            description,
+            status,
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use common::{overly_long_description, overly_long_title, valid_description, valid_title};
+
+    #[test]
+    #[should_panic(expected = "Title cannot be empty")]
+    fn title_cannot_be_empty() {
+        Ticket::new("".into(), valid_title(), "To-Do".into());
+    }
+
+    #[test]
+    #[should_panic(expected = "Description cannot be empty")]
+    fn description_cannot_be_empty() {
+        Ticket::new(valid_title(), "".into(), "To-Do".into());
+    }
+
+    #[test]
+    #[should_panic(expected = "Title cannot be longer than 50 characters")]
+    fn title_cannot_be_longer_than_fifty_chars() {
+        Ticket::new(overly_long_title(), valid_description(), "To-Do".into());
+    }
+
+    #[test]
+    #[should_panic(expected = "Description cannot be longer than 500 characters")]
+    fn description_cannot_be_longer_than_500_chars() {
+        Ticket::new(valid_title(), overly_long_description(), "To-Do".into());
+    }
+
+    #[test]
+    #[should_panic(expected = "Only `To-Do`, `In Progress`, and `Done` statuses are allowed")]
+    fn status_must_be_valid() {
+        Ticket::new(valid_title(), valid_description(), "Funny".into());
+    }
+
+    #[test]
+    fn done_is_allowed() {
+        Ticket::new(valid_title(), valid_description(), "Done".into());
+    }
+
+    #[test]
+    fn in_progress_is_allowed() {
+        Ticket::new(valid_title(), valid_description(), "In Progress".into());
+    }
+}