5660a2f7a8
The output of the compiler does not include the module name of the `Ticket` struct and the root module of this exercise is `visibility` rather than `encapsulation` which is the root module of the next exercise.
78 lines
2.9 KiB
Rust
78 lines
2.9 KiB
Rust
mod ticket {
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struct Ticket {
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title: String,
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description: String,
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status: String,
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}
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impl Ticket {
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fn new(title: String, description: String, status: String) -> Ticket {
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if title.is_empty() {
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panic!("Title cannot be empty");
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}
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if title.len() > 50 {
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panic!("Title cannot be longer than 50 bytes");
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}
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if description.is_empty() {
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panic!("Description cannot be empty");
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}
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if description.len() > 500 {
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panic!("Description cannot be longer than 500 bytes");
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}
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if status != "To-Do" && status != "In Progress" && status != "Done" {
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panic!("Only `To-Do`, `In Progress`, and `Done` statuses are allowed");
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}
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Ticket {
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title,
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description,
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status,
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}
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}
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}
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}
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// TODO: **Exceptionally**, you'll be modifying both the `ticket` module and the `tests` module
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// in this exercise.
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#[cfg(test)]
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mod tests {
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// TODO: Add the necessary `pub` modifiers in the parent module to remove the compiler
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// errors about the use statement below.
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use super::ticket::Ticket;
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// Be careful though! We don't want this function to compile after you have changed
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// visibility to make the use statement compile!
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// Once you have verified that it indeed doesn't compile, comment it out.
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fn should_not_be_possible() {
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let ticket = Ticket::new("A title".into(), "A description".into(), "To-Do".into());
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// You should be seeing this error when trying to run this exercise:
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//
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// error[E0616]: field `description` of struct `Ticket` is private
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// |
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// | assert_eq!(ticket.description, "A description");
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// | ^^^^^^^^^^^^^^^^^^
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//
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// TODO: Once you have verified that the below does not compile,
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// comment the line out to move on to the next exercise!
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assert_eq!(ticket.description, "A description");
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}
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fn encapsulation_cannot_be_violated() {
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// This should be impossible as well, with a similar error as the one encountered above.
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// (It will throw a compilation error only after you have commented the faulty line
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// in the previous test - next compilation stage!)
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//
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// This proves that `Ticket::new` is now the only way to get a `Ticket` instance.
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// It's impossible to create a ticket with an illegal title or description!
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//
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// TODO: Once you have verified that the below does not compile,
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// comment the lines out to move on to the next exercise!
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let ticket = Ticket {
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title: "A title".into(),
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description: "A description".into(),
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status: "To-Do".into(),
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};
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}
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}
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