1 files changed, 15 insertions, 0 deletions
diff --git a/internal/player/xp_test.go b/internal/player/xp_test.go
new file mode 100644
index 0000000..fc0eeb4
--- /dev/null
+++ b/internal/player/xp_test.go
@@ -0,0 +1,15 @@
+package player
+
+import "testing"
+
+// Regression: XPTable was declared [100]int with 99 initializers, so index 99
+// silently read as 0 ("level 100 costs 0 XP"). The array is now sized so an
+// out-of-range index is a compile error.
+func TestXPTableBounds(t *testing.T) {
+	if len(XPTable) != 99 {
+		t.Fatalf("len(XPTable) = %d, want 99", len(XPTable))
+	}
+	if XPTable[98] != 13034431 {
+		t.Fatalf("XPTable[98] = %d, want 13034431", XPTable[98])
+	}
+}