more string reading tests

tests/tests.rs

@@ -252,6 +252,41 @@ fn test_read_str_be() {
     );
 }
 
+#[test]
+fn test_read_str_le() {
+    let bytes = vec![
+        'h' as u8,
+        'e' as u8,
+        'l' as u8,
+        'l' as u8,
+        'o' as u8,
+        ' ' as u8,
+        'w' as u8,
+        'o' as u8,
+        'r' as u8,
+        'l' as u8,
+        'd' as u8,
+        0,
+        'f' as u8,
+        'o' as u8,
+        'o' as u8,
+        0, 0, 0, 0, 0,
+    ];
+    let buffer = BitBuffer::new(bytes, LittleEndian);
+    assert_eq!(
+        buffer.read_string(0, Some(3)).unwrap(),
+        "hel".to_owned()
+    );
+    assert_eq!(
+        buffer.read_string(0, Some(11)).unwrap(),
+        "hello world".to_owned()
+    );
+    assert_eq!(
+        buffer.read_string(0, None).unwrap(),
+        "hello world".to_owned()
+    );
+}
+
 #[test]
 fn read_trait() {
     let buffer = BitBuffer::new(BYTES.to_vec(), BigEndian);