copy-paste problems

src/assignments/assignment07/transform_grade.rs

@@ -0,0 +1,62 @@
+#[cfg(test)]
+mod test {
+    use itertools::Itertools;
+    use ntest::assert_about_eq;
+
+    use super::super::transform::*;
+
+    #[test]
+    fn test_transform_identity() {
+        let tr = Identity;
+
+        assert_eq!(tr.transform(3), 3);
+        assert_eq!(tr.transform(3.0), 3.0);
+        assert_eq!(tr.transform("abc"), "abc");
+    }
+
+    #[test]
+    fn test_transform_tuple() {
+        let f1 = |x: u32| x + 1;
+        let f2 = |x: String| x.clone() + &x;
+
+        let tr1: Custom<_, _> = f1.into();
+        let tr2: Custom<_, _> = f2.into();
+
+        let list1 = 0u32..10u32;
+        let list2 = ["a".to_string(), "bb".to_string(), "ccc".to_string()];
+
+        for v1 in list1 {
+            for v2 in list2.clone() {
+                let tr = (tr1, tr2.clone());
+                let input = (v1, v2.clone());
+                let expected = (f1(v1), f2(v2));
+                assert_eq!(tr.transform(input), expected);
+            }
+        }
+    }
+
+    #[test]
+    fn test_transform_repeat() {
+        let inc = Custom::from(|x: i32| x + 1);
+        let dec = Custom::from(|x: i32| x - 1);
+
+        for i in 0..10 {
+            for j in -10..10 {
+                assert_eq!(Repeat::new(inc, i as u32).transform(j), j + i);
+                assert_eq!(Repeat::new(dec, i as u32).transform(j), j - i);
+            }
+        }
+    }
+
+    #[test]
+    fn test_transform_repeat_until_converge() {
+        let inc = Custom::from(|x: i32| if x < 50 { x + 1 } else { x });
+        let dec = Custom::from(|x: i32| if x > 50 { x - 1 } else { x });
+
+        assert_eq!(RepeatUntilConverge::new(inc).transform(40), 50);
+        assert_eq!(RepeatUntilConverge::new(inc).transform(60), 60);
+
+        assert_eq!(RepeatUntilConverge::new(dec).transform(40), 40);
+        assert_eq!(RepeatUntilConverge::new(dec).transform(60), 50);
+    }
+}