refactor rectangles to have lib.rs to allow integration tests

rectangles/src/lib.rs

@@ -0,0 +1,121 @@
+#[derive(Debug)]
+pub struct Rectangle {
+    width: u32,
+    height: u32,
+}
+
+impl Rectangle {
+    pub fn build_rectangle(width: u32, height: u32) -> Rectangle {
+        Rectangle { width, height }
+    }
+
+    pub fn square(size: u32) -> Rectangle {
+        Rectangle::build_rectangle(size, size)
+    }
+
+    pub fn area(&self) -> u32 {
+        self.width * self.height
+    }
+
+    pub fn can_hold(&self, other: &Rectangle) -> bool {
+        self.width > other.width && self.height > other.height
+    }
+
+    // convenience function to show use of Result<T,E> in tests
+    fn return_result(&self, is_succes: bool) -> Result<(), ()> {
+        if is_succes {
+            Ok(())
+        } else {
+            Err(())
+        }
+    }
+
+    // convenience function to show panic used in tests
+    fn return_panic(&self, is_panic: bool) {
+        if is_panic {
+            panic!("HEEELP");
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn square() {
+        let sq = Rectangle::square(4);
+
+        assert_eq!(sq.width, sq.height);
+    }
+
+    #[test]
+    fn area() {
+        let width = 4;
+        let height = 5;
+        let rect = Rectangle::build_rectangle(width, height);
+
+        assert_eq!(rect.area(), width * height);
+    }
+
+    #[test]
+    fn larger_can_hold_smaller() {
+        let smaller = Rectangle::build_rectangle(3, 4);
+        let larger = Rectangle::build_rectangle(5, 6);
+
+        assert!(larger.can_hold(&smaller));
+    }
+
+    #[test]
+    fn smaller_cannot_hold_larger() {
+        let smaller = Rectangle::build_rectangle(3, 4);
+        let larger = Rectangle::build_rectangle(5, 6);
+
+        assert!(!smaller.can_hold(&larger));
+    }
+
+    #[test]
+    fn result_success() -> Result<(), ()> {
+        let rect = Rectangle::build_rectangle(3, 4);
+
+        rect.return_result(true)?;
+
+        Ok(())
+    }
+
+    #[test]
+    #[should_panic(expected = "HEEELP")]
+    fn result_panic() {
+        let rect = Rectangle::build_rectangle(3, 4);
+
+        rect.return_panic(true);
+    }
+
+    #[test]
+    #[ignore]
+    fn result_will_fail_with_result() -> Result<(), ()> {
+        let rect = Rectangle::build_rectangle(3, 4);
+
+        rect.return_result(false)?;
+
+        Ok(())
+    }
+
+    #[test]
+    #[ignore]
+    #[should_panic]
+    fn result_will_not_panic_and_fail() {
+        let rect = Rectangle::build_rectangle(3, 4);
+
+        rect.return_panic(false);
+    }
+
+    #[test]
+    #[ignore]
+    #[should_panic(expected = "HEEEEEEEEEEEEEEEEEEEELP")]
+    fn result_will_panic_but_with_wrong_message_and_fail() {
+        let rect = Rectangle::build_rectangle(3, 4);
+
+        rect.return_panic(false);
+    }
+}

rectangles/src/main.rs

@@ -1,43 +1,4 @@
-#[derive(Debug)]
-struct Rectangle {
-    width: u32,
-    height: u32,
-}
-
-impl Rectangle {
-    fn build_rectangle(width: u32, height: u32) -> Rectangle {
-        Rectangle { width, height }
-    }
-
-    fn square(size: u32) -> Rectangle {
-        Rectangle::build_rectangle(size, size)
-    }
-
-    fn area(&self) -> u32 {
-        self.width * self.height
-    }
-
-    fn can_hold(&self, other: &Rectangle) -> bool {
-        self.width > other.width && self.height > other.height
-    }
-
-    // convenience function to show use of Result<T,E> in tests
-    fn return_result(&self, is_succes: bool) -> Result<(), ()> {
-        if is_succes {
-            Ok(())
-        } else {
-            Err(())
-        }
-    }
-
-    // convenience function to show panic used in tests
-    fn return_panic(&self, is_panic: bool) {
-       if is_panic {
-       	  panic!("HEEELP");
-       }
-    }
-
-}
+use rectangles::Rectangle;
 
 fn main() {
     let width1 = 30;
@@ -55,15 +16,7 @@ fn main() {
         area_tuple(rect)
     );
 
-    let rect = Rectangle {
-        width: 30,
-        height: 50,
-    };
-
-    println!(
-        "The area of the rectangle is {} square pixels.",
-        area_struct(&rect)
-    );
+    let rect = Rectangle::build_rectangle(30, 50);
 
     println!(
         "The area of the rectangle is {} square pixels.",
@@ -92,87 +45,3 @@ fn area(width: u32, height: u32) -> u32 {
 fn area_tuple(dimensions: (u32, u32)) -> u32 {
     dimensions.0 * dimensions.1
 }
-
-fn area_struct(rect: &Rectangle) -> u32 {
-    rect.width * rect.height
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn square() {
-        let sq = Rectangle::square(4);
-
-        assert_eq!(sq.width, sq.height);
-    }
-
-    #[test]
-    fn area() {
-        let width = 4;
-        let height = 5;
-        let rect = Rectangle::build_rectangle(width, height);
-
-        assert_eq!(rect.area(), width * height);
-    }
-
-    #[test]
-    fn larger_can_hold_smaller() {
-        let smaller = Rectangle::build_rectangle(3, 4);
-        let larger = Rectangle::build_rectangle(5, 6);
-
-        assert!(larger.can_hold(&smaller));
-    }
-
-    #[test]
-    fn smaller_cannot_hold_larger() {
-        let smaller = Rectangle::build_rectangle(3, 4);
-        let larger = Rectangle::build_rectangle(5, 6);
-
-        assert!(!smaller.can_hold(&larger));
-    }
-
-    #[test]
-    fn result_success() -> Result<(), ()> {
-        let rect = Rectangle::build_rectangle(3, 4);
-
-        rect.return_result(true)?;
-
-        Ok(())
-    }
-
-    #[test]
-    fn result_will_fail_with_result() -> Result<(), ()> {
-        let rect = Rectangle::build_rectangle(3, 4);
-
-        rect.return_result(false)?;
-
-        Ok(())
-    }
-
-    #[test]
-    #[should_panic(expected = "HEEELP")]
-    fn result_panic() {
-        let rect = Rectangle::build_rectangle(3, 4);
-
-        rect.return_panic(true);
-    }
-
-    #[test]
-    #[should_panic]
-    fn result_will_not_panic_and_fail() {
-        let rect = Rectangle::build_rectangle(3, 4);
-
-        rect.return_panic(false);
-    }
-
-    #[test]
-    #[should_panic(expected = "HEEEEEEEEEEEEEEEEEEEELP")]
-    fn result_will_panic_but_with_wrong_message_and_fail() {
-        let rect = Rectangle::build_rectangle(3, 4);
-
-        rect.return_panic(false);
-    }
-
-}