Move quizzes

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.
+// - If Mary buys more than 40 apples, each apple only costs 1 rustbuck!
+// Write a function that calculates the price of an order of apples given the
+// quantity bought.
+
+// Put your function here!
+// fn calculate_price_of_apples {
+
+fn main() {
+    // You can optionally experiment here.
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    // Don't modify this test!
+    #[test]
+    fn verify_test() {
+        let price1 = calculate_price_of_apples(35);
+        let price2 = calculate_price_of_apples(40);
+        let price3 = calculate_price_of_apples(41);
+        let price4 = calculate_price_of_apples(65);
+
+        assert_eq!(70, price1);
+        assert_eq!(80, price2);
+        assert_eq!(41, price3);
+        assert_eq!(65, price4);
+    }
+}

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 a 2-length tuple,
+//   the first element is the string, the second one is the command.
+// - The output element is going to be a Vector of strings.
+
+pub enum Command {
+    Uppercase,
+    Trim,
+    Append(usize),
+}
+
+mod my_module {
+    use super::Command;
+
+    // TODO: Complete the function signature!
+    pub fn transformer(input: ???) -> ??? {
+        // TODO: Complete the output declaration!
+        let mut output: ??? = vec![];
+        for (string, command) in input.iter() {
+            // TODO: Complete the function body. You can do it!
+        }
+        output
+    }
+}
+
+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;
+
+    #[test]
+    fn it_works() {
+        let output = transformer(vec![
+            ("hello".into(), Command::Uppercase),
+            (" all roads lead to rome! ".into(), Command::Trim),
+            ("foo".into(), Command::Append(1)),
+            ("bar".into(), Command::Append(5)),
+        ]);
+        assert_eq!(output[0], "HELLO");
+        assert_eq!(output[1], "all roads lead to rome!");
+        assert_eq!(output[2], "foobar");
+        assert_eq!(output[3], "barbarbarbarbarbar");
+    }
+}

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. Change the Grade in the second test to
+// "A+" to show that your changes allow alphabetical grades.
+
+pub struct ReportCard {
+    pub grade: f32,
+    pub student_name: String,
+    pub student_age: u8,
+}
+
+impl ReportCard {
+    pub 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() {
+        // TODO: Make sure to change the grade here after you finish the exercise.
+        let report_card = ReportCard {
+            grade: 2.1,
+            student_name: "Gary Plotter".to_string(),
+            student_age: 11,
+        };
+        assert_eq!(
+            report_card.print(),
+            "Gary Plotter (11) - achieved a grade of A+"
+        );
+    }
+}