diff --git a/src/gamedata/tests.rs b/src/gamedata/tests.rs
index e69de29..92190be 100644
--- a/src/gamedata/tests.rs
+++ b/src/gamedata/tests.rs
@@ -0,0 +1,17 @@
+use crate::gamedata::Board;
+
+use super::Disk;
+
+#[test]
+fn board_default() {
+    assert_eq!(7, Board::default().columns.len())
+}
+#[test]
+fn play() {
+    let mut board = Board::default();
+    assert!(board.columns.get(0).expect("Nah").is_empty());
+    board.play(Disk::BLUE, 0);
+    assert_eq!(1, board.columns[0].len());
+    board.play(Disk::RED, 0);
+    assert_eq!(2, board.columns[0].len());
+}