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-rw-r--r--rust/rustlings/exercises/quizzes/README.md3
-rw-r--r--rust/rustlings/exercises/quizzes/quiz1.rs35
-rw-r--r--rust/rustlings/exercises/quizzes/quiz2.rs81
-rw-r--r--rust/rustlings/exercises/quizzes/quiz3.rs64
4 files changed, 183 insertions, 0 deletions
diff --git a/rust/rustlings/exercises/quizzes/README.md b/rust/rustlings/exercises/quizzes/README.md
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+# Quizzes
+
+After every couple of sections, there will be a quiz in this directory that'll test your knowledge on a bunch of sections at once.
diff --git a/rust/rustlings/exercises/quizzes/quiz1.rs b/rust/rustlings/exercises/quizzes/quiz1.rs
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+// This is a quiz for the following sections:
+// - Variables
+// - Functions
+// - If
+//
+// Mary is buying apples. The price of an apple is calculated as follows:
+// - An apple costs 2 rustbucks.
+// - However, if Mary buys more than 40 apples, the price of each apple in the
+// entire order is reduced to only 1 rustbuck!
+
+fn calculate_price_of_apples(n: i32) -> i32 {
+ if n > 40 {
+ n
+ } else {
+ 2 * n
+ }
+}
+
+fn main() {
+ // You can optionally experiment here.
+}
+
+// Don't change the tests!
+#[cfg(test)]
+mod tests {
+ use super::*;
+
+ #[test]
+ fn verify_test() {
+ assert_eq!(calculate_price_of_apples(35), 70);
+ assert_eq!(calculate_price_of_apples(40), 80);
+ assert_eq!(calculate_price_of_apples(41), 41);
+ assert_eq!(calculate_price_of_apples(65), 65);
+ }
+}
diff --git a/rust/rustlings/exercises/quizzes/quiz2.rs b/rust/rustlings/exercises/quizzes/quiz2.rs
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+// This is a quiz for the following sections:
+// - Strings
+// - Vecs
+// - Move semantics
+// - Modules
+// - Enums
+//
+// Let's build a little machine in the form of a function. As input, we're going
+// to give a list of strings and commands. These commands determine what action
+// is going to be applied to the string. It can either be:
+// - Uppercase the string
+// - Trim the string
+// - Append "bar" to the string a specified amount of times
+//
+// The exact form of this will be:
+// - The input is going to be a Vector of 2-length tuples,
+// the first element is the string, the second one is the command.
+// - The output element is going to be a vector of strings.
+
+enum Command {
+ Uppercase,
+ Trim,
+ Append(usize),
+}
+
+mod my_module {
+ use super::Command;
+
+ // TODO: Complete the function as described above.
+ // pub fn transformer(input: ???) -> ??? { ??? }
+ pub fn transformer(input: Vec<(String, Command)>) -> Vec<String> {
+ let mut out = Vec::new();
+ for inp in input {
+ out.push(match inp.1 {
+ Command::Uppercase => inp.0.to_uppercase(),
+ Command::Trim => String::from(inp.0.trim()),
+ Command::Append(n) => {
+ let mut r = inp.0;
+ for _ in 0..n {
+ r += "bar";
+ }
+ r
+ }
+ });
+ }
+ out
+ }
+}
+
+fn main() {
+ // You can optionally experiment here.
+}
+
+#[cfg(test)]
+mod tests {
+ // TODO: What do we need to import to have `transformer` in scope?
+ // use ???;
+ use super::Command;
+ use super::my_module::transformer;
+
+ #[test]
+ fn it_works() {
+ let input = vec![
+ ("hello".to_string(), Command::Uppercase),
+ (" all roads lead to rome! ".to_string(), Command::Trim),
+ ("foo".to_string(), Command::Append(1)),
+ ("bar".to_string(), Command::Append(5)),
+ ];
+ let output = transformer(input);
+
+ assert_eq!(
+ output,
+ [
+ "HELLO",
+ "all roads lead to rome!",
+ "foobar",
+ "barbarbarbarbarbar",
+ ]
+ );
+ }
+}
diff --git a/rust/rustlings/exercises/quizzes/quiz3.rs b/rust/rustlings/exercises/quizzes/quiz3.rs
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+++ b/rust/rustlings/exercises/quizzes/quiz3.rs
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+// This quiz tests:
+// - Generics
+// - Traits
+//
+// An imaginary magical school has a new report card generation system written
+// in Rust! Currently, the system only supports creating report cards where the
+// student's grade is represented numerically (e.g. 1.0 -> 5.5). However, the
+// school also issues alphabetical grades (A+ -> F-) and needs to be able to
+// print both types of report card!
+//
+// Make the necessary code changes in the struct `ReportCard` and the impl
+// block to support alphabetical report cards in addition to numerical ones.
+
+// TODO: Adjust the struct as described above.
+struct ReportCard<T> {
+ grade: T,
+ student_name: String,
+ student_age: u8,
+}
+
+// TODO: Adjust the impl block as described above.
+impl<T: std::fmt::Display> ReportCard<T> {
+ fn print(&self) -> String {
+ format!(
+ "{} ({}) - achieved a grade of {}",
+ &self.student_name, &self.student_age, &self.grade,
+ )
+ }
+}
+
+fn main() {
+ // You can optionally experiment here.
+}
+
+#[cfg(test)]
+mod tests {
+ use super::*;
+
+ #[test]
+ fn generate_numeric_report_card() {
+ let report_card = ReportCard {
+ grade: 2.1,
+ student_name: "Tom Wriggle".to_string(),
+ student_age: 12,
+ };
+ assert_eq!(
+ report_card.print(),
+ "Tom Wriggle (12) - achieved a grade of 2.1",
+ );
+ }
+
+ #[test]
+ fn generate_alphabetic_report_card() {
+ let report_card = ReportCard {
+ grade: "A+",
+ student_name: "Gary Plotter".to_string(),
+ student_age: 11,
+ };
+ assert_eq!(
+ report_card.print(),
+ "Gary Plotter (11) - achieved a grade of A+",
+ );
+ }
+}