improve -Wrote test for the rotate algorithm and fix some syntax error in rotate algorithm.

Author: phoenix-deb

rotate.py

@@ -4,5 +4,4 @@ def rotate_string(sequence: str, value: int) -> str:
     if value <= len(sequence):
         return result[value:value+len(sequence)]
     else:
-        return resut[value-len(sequence):value]
-
+        return result[value-len(sequence):value]

tests/test_rotate.py

@@ -0,0 +1,11 @@
+from ..rotate import rotate_string
+
+class TestRotate:
+    def test_rotate_string(self):
+        assert rotate_string('Github', 3) == 'hubGit'
+        assert rotate_string('Github', 6) == 'Github'
+        assert rotate_string('Github', 7) == 'ithubG'
+        assert rotate_string('Github', -1) == ''
+        assert rotate_string('Github', -3) == ''
+        assert rotate_string('', 3) == ''
+        assert rotate_string('', -3) == ''