Tests

exercises/17_tests/tests1.rs

@@ -10,12 +10,10 @@
 // Execute `rustlings hint tests1` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 #[cfg(test)]
 mod tests {
     #[test]
     fn you_can_assert() {
-        assert!();
+        assert!(true);
     }
 }

exercises/17_tests/tests2.rs

@@ -6,12 +6,10 @@
 // Execute `rustlings hint tests2` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 #[cfg(test)]
 mod tests {
     #[test]
     fn you_can_assert_eq() {
-        assert_eq!();
+        assert_eq!(true, true);
     }
 }

exercises/17_tests/tests3.rs

@@ -7,8 +7,6 @@
 // Execute `rustlings hint tests3` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 pub fn is_even(num: i32) -> bool {
     num % 2 == 0
 }
@@ -19,11 +17,12 @@ mod tests {
 
     #[test]
     fn is_true_when_even() {
-        assert!();
+        assert!(true);
     }
 
     #[test]
     fn is_false_when_odd() {
-        assert!();
+        let result = is_even(5);
+        assert!(!result);
     }
 }

exercises/17_tests/tests4.rs

@@ -5,20 +5,18 @@
 // Execute `rustlings hint tests4` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 struct Rectangle {
     width: i32,
-    height: i32
+    height: i32,
 }
 
 impl Rectangle {
     // Only change the test functions themselves
     pub fn new(width: i32, height: i32) -> Self {
         if width <= 0 || height <= 0 {
-            panic!("Rectangle width and height cannot be negative!")
+            panic!("Rectangle width and height cannot be negative!");
         }
-        Rectangle {width, height}
+        Rectangle { width, height }
     }
 }
 
@@ -30,19 +28,21 @@ mod tests {
     fn correct_width_and_height() {
         // This test should check if the rectangle is the size that we pass into its constructor
         let rect = Rectangle::new(10, 20);
-        assert_eq!(???, 10); // check width
-        assert_eq!(???, 20); // check height
+        assert_eq!(rect.width, 10); // check width
+        assert_eq!(rect.height, 20); // check height
     }
 
     #[test]
+    #[should_panic(expected = "Rectangle width and height cannot be negative!")]
     fn negative_width() {
         // This test should check if program panics when we try to create rectangle with negative width
-        let _rect = Rectangle::new(-10, 10);
+        Rectangle::new(-10, 10);
     }
 
     #[test]
+    #[should_panic(expected = "Rectangle width and height cannot be negative!")]
     fn negative_height() {
         // This test should check if program panics when we try to create rectangle with negative height
-        let _rect = Rectangle::new(10, -10);
+        Rectangle::new(10, -10);
     }
 }