diff --git a/src/string/tests.rs b/src/string/tests.rs
index 744effe..603f5e6 100644
--- a/src/string/tests.rs
+++ b/src/string/tests.rs
@@ -22,3 +22,12 @@ fn data_setter() {
     assert_eq!(_d[1], 'U');
     assert_eq!(_d[2], 'G');
 }
+
+#[test]
+fn size_getter() {
+    let mut _data: Vec<char> = vec!['H', 'U', 'G'];
+    let mut _s: Str = Str::new();
+    _s.set_data(&_data);
+    let _d = _s.get_size();
+    assert_eq!(_d, 3);
+}