initial commit

exercises/04_traits/04_derive/Cargo.toml

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+[package]
+name = "derives"
+version = "0.1.0"
+edition = "2021"

exercises/04_traits/04_derive/src/lib.rs

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+// TODO: A (derivable) trait implementation is missing for this exercise to compile successfully.
+//   Fix it!
+//
+// # `Debug` primer
+//
+// `Debug` returns a representation of a Rust type that's suitable for debugging (hence the name).
+// `assert_eq!` requires `Ticket` to implement `Debug` because, when the assertion fails, it tries to
+// print both sides of the comparison to the terminal.
+// If the compared type doesn't implement `Debug`, it doesn't know how to represent them!
+
+#[derive(PartialEq)]
+struct Ticket {
+    title: String,
+    description: String,
+    status: String,
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_partial_eq() {
+        let title = "title";
+        let description = "description";
+        let status = "To-Do";
+        let ticket1 = Ticket {
+            title: title.to_string(),
+            description: description.to_string(),
+            status: status.to_string(),
+        };
+        let ticket2 = Ticket {
+            title: title.to_string(),
+            description: description.to_string(),
+            status: status.to_string(),
+        };
+        assert_eq!(ticket1, ticket2);
+    }
+
+    #[test]
+    fn test_description_not_matching() {
+        let title = "title";
+        let status = "To-Do";
+        let ticket1 = Ticket {
+            title: title.to_string(),
+            description: "description".to_string(),
+            status: status.to_string(),
+        };
+        let ticket2 = Ticket {
+            title: title.to_string(),
+            description: "description2".to_string(),
+            status: status.to_string(),
+        };
+        assert_ne!(ticket1, ticket2);
+    }
+
+    #[test]
+    fn test_title_not_matching() {
+        let status = "To-Do";
+        let description = "description";
+        let ticket1 = Ticket {
+            title: "title".to_string(),
+            description: description.to_string(),
+            status: status.to_string(),
+        };
+        let ticket2 = Ticket {
+            title: "title2".to_string(),
+            description: description.to_string(),
+            status: status.to_string(),
+        };
+        assert_ne!(ticket1, ticket2);
+    }
+
+    #[test]
+    fn test_status_not_matching() {
+        let title = "title";
+        let description = "description";
+        let ticket1 = Ticket {
+            title: title.to_string(),
+            description: description.to_string(),
+            status: "status".to_string(),
+        };
+        let ticket2 = Ticket {
+            title: title.to_string(),
+            description: description.to_string(),
+            status: "status2".to_string(),
+        };
+        assert_ne!(ticket1, ticket2);
+    }
+}