Rename sheet folders to assure proper sorting

aufgaben/sheet07/task2/iters.rs

@@ -0,0 +1,47 @@
+#[test]
+fn test_factorial() {
+    assert_eq!(factorial(1), 1);
+    assert_eq!(factorial(2), 2);
+    assert_eq!(factorial(3), 6);
+    assert_eq!(factorial(15), 1_307_674_368_000);
+}
+
+#[test]
+fn test_is_palindrome() {
+    assert!(is_palindrome("bob"));
+    assert!(is_palindrome("anna"));
+    assert!(is_palindrome("lagerregal"));
+
+    assert!(!is_palindrome("peter"));
+}
+
+#[test]
+fn test_greatest_subsequencial_sum() {
+    let a = [1, 2, 39, 34, 20, -20, -16, 35, 0];
+    assert_eq!(greatest_subsequencial_sum(&a), &a[0..5]);
+
+    let b = [-3, -9, -8, -34];
+    assert_eq!(greatest_subsequencial_sum(&b), &[]);
+}
+
+#[test]
+fn test_rot13() {
+    assert_eq!(rot13("hello"), "uryyb");
+    assert_eq!(rot13("uryyb"), "hello");
+
+    assert_eq!(
+        rot13("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"),
+        "NOPQRSTUVWXYZABCDEFGHIJKLMnopqrstuvwxyzabcdefghijklm"
+    );
+
+    assert_eq!(rot13("peter"), "crgre");
+}
+
+#[test]
+fn test_used_letters() {
+    assert_eq!(used_chars_count(&["hi", "ih gitt"]), 4);
+    assert_eq!(used_chars_count(&["peter"]), 4);
+    assert_eq!(used_chars_count(&["p e t e r", "barbara"]), 6);
+}
+
+fn main() {}