wrote a test that throws error when string is empty

Author: MaharitB

practice-tdd/repeat-str.js

@@ -6,6 +6,9 @@ export function repeatStr(str, count) {
   let repeatedStr = str;
   count = Math.floor(count);
 
+  if (str === " ") {
+    throw new Error("String shoild not be empty");
+  }
   if (count < 0) {
     throw new Error("Negative counts are not valid");
   }