added test for get_fixed_length_string

Author: dantownsend

tests/utils/__init__.py

@@ -0,0 +1,9 @@
+from unittest import TestCase
+
+from piccolo.utils.printing import get_fixed_length_string
+
+
+class TestGetFixedLengthString(TestCase):
+    def test_get_fixed_length_string(self):
+        result = get_fixed_length_string(string="hello", length=10)
+        self.assertEqual(result, "hello     ")