initial commit

exercises/05_ticket_v2/06_fallibility/src/lib.rs

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+// TODO: Convert the `Ticket::new` method to return a `Result` instead of panicking.
+//   Use `String` as the error type.
+
+#[derive(Debug, PartialEq)]
+struct Ticket {
+    title: String,
+    description: String,
+    status: Status,
+}
+
+#[derive(Debug, PartialEq)]
+enum Status {
+    ToDo,
+    InProgress { assigned_to: String },
+    Done,
+}
+
+impl Ticket {
+    pub fn new(title: String, description: String, status: Status) -> Ticket {
+        if title.is_empty() {
+            panic!("Title cannot be empty");
+        }
+        if title.len() > 50 {
+            panic!("Title cannot be longer than 50 bytes");
+        }
+        if description.is_empty() {
+            panic!("Description cannot be empty");
+        }
+        if description.len() > 500 {
+            panic!("Description cannot be longer than 500 bytes");
+        }
+
+        Ticket {
+            title,
+            description,
+            status,
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use common::{overly_long_description, overly_long_title, valid_description, valid_title};
+
+    #[test]
+    fn title_cannot_be_empty() {
+        let error = Ticket::new("".into(), valid_description(), Status::ToDo).unwrap_err();
+        assert_eq!(error, "Title cannot be empty");
+    }
+
+    #[test]
+    fn description_cannot_be_empty() {
+        let error = Ticket::new(valid_title(), "".into(), Status::ToDo).unwrap_err();
+        assert_eq!(error, "Description cannot be empty");
+    }
+
+    #[test]
+    fn title_cannot_be_longer_than_fifty_chars() {
+        let error =
+            Ticket::new(overly_long_title(), valid_description(), Status::ToDo).unwrap_err();
+        assert_eq!(error, "Title cannot be longer than 50 bytes");
+    }
+
+    #[test]
+    fn description_cannot_be_longer_than_500_chars() {
+        let error =
+            Ticket::new(valid_title(), overly_long_description(), Status::ToDo).unwrap_err();
+        assert_eq!(error, "Description cannot be longer than 500 bytes");
+    }
+}