repeatStr function code completed

Author: alizada-dev

Sprint-3/2-practice-tdd/repeat-str.js

@@ -1,5 +1,9 @@
-function repeatStr() {
-  return "hellohellohello";
+function repeatStr(str, count) {
+  if (count >= 0) {
+    return str.repeat(count);
+  } else {
+    throw new Error("");
+  }
 }
 
 module.exports = repeatStr;