initial commit

exercises/03_ticket_v1/12_outro/Cargo.toml

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+[package]
+name = "outro_02"
+version = "0.1.0"
+edition = "2021"

exercises/03_ticket_v1/12_outro/src/lib.rs

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+// TODO: Define a new `Order` type.
+//   It should keep track of three pieces of information: `product_name`, `quantity`, and `unit_price`.
+//   The product name can't be empty and it can't be longer than 300 bytes.
+//   The quantity must be strictly greater than zero.
+//   The unit price is in cents and must be strictly greater than zero.
+//   Order must include a method named `total` that returns the total price of the order.
+//   Order must provide setters and getters for each field.
+//
+// Tests are located in a different place this time—in the `tests` folder.
+// The `tests` folder is a special location for `cargo`. It's where it looks for **integration tests**.
+// Integration here has a very specific meaning: they test **the public API** of your project.
+// You'll need to pay attention to the visibility of your types and methods; integration
+// tests can't access private or `pub(crate)` items.

exercises/03_ticket_v1/12_outro/tests/integration.rs

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+use outro_02::Order;
+
+// Files inside the `tests` directory are only compiled when you run tests.
+// As a consequence, we don't need the `#[cfg(test)]` attribute for conditional compilation—it's
+// implied.
+
+#[test]
+fn test_order() {
+    let mut order = Order::new("Rusty Book".to_string(), 3, 2999);
+
+    assert_eq!(order.product_name(), "Rusty Book");
+    assert_eq!(order.quantity(), &3);
+    assert_eq!(order.unit_price(), &2999);
+    assert_eq!(order.total(), 8997);
+
+    order.set_product_name("Rust Book".to_string());
+    order.set_quantity(2);
+    order.set_unit_price(3999);
+
+    assert_eq!(order.product_name(), "Rust Book");
+    assert_eq!(order.quantity(), &2);
+    assert_eq!(order.unit_price(), &3999);
+    assert_eq!(order.total(), 7998);
+}
+
+// Validation tests
+#[test]
+#[should_panic]
+fn test_empty_product_name() {
+    Order::new("".to_string(), 3, 2999);
+}
+
+#[test]
+#[should_panic]
+fn test_long_product_name() {
+    Order::new("a".repeat(301), 3, 2999);
+}
+
+#[test]
+#[should_panic]
+fn test_zero_quantity() {
+    Order::new("Rust Book".to_string(), 0, 2999);
+}
+
+#[test]
+#[should_panic]
+fn test_zero_unit_price() {
+    Order::new("Rust Book".to_string(), 3, 0);
+}