pass more test cases

Author: rootulp

rust/isogram/src/lib.rs

@@ -5,7 +5,7 @@ pub fn check(candidate: &str) -> bool {
         return true
     }
     let mut seen: HashSet<char> = HashSet ::new();
-    for char in candidate.chars() {
+    for char in candidate.to_lowercase().chars() {
         if seen.contains(&char) {
             return false
         }

rust/isogram/tests/isogram.rs

@@ -26,25 +26,21 @@ fn longest_reported_english_isogram() {
 }
 
 #[test]
-#[ignore]
 fn word_with_duplicated_character_in_mixed_case() {
     assert!(!check("Alphabet"));
 }
 
 #[test]
-#[ignore]
 fn word_with_duplicated_character_in_mixed_case_lowercase_first() {
     assert!(!check("alphAbet"));
 }
 
 #[test]
-#[ignore]
 fn hypothetical_isogrammic_word_with_hyphen() {
     assert!(check("thumbscrew-japingly"));
 }
 
 #[test]
-#[ignore]
 fn hypothetical_word_with_duplicated_character_following_hyphen() {
     assert!(!check("thumbscrew-jappingly"));
 }