1 files changed, 23 insertions, 0 deletions
diff --git a/TwoStepsAuthenticator.UnitTests/UsedCodesManagerTests.cs b/TwoStepsAuthenticator.UnitTests/UsedCodesManagerTests.cs
new file mode 100644
index 0000000..7099c89
--- /dev/null
+++ b/TwoStepsAuthenticator.UnitTests/UsedCodesManagerTests.cs
@@ -0,0 +1,23 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using NUnit.Framework;
+
+namespace TwoStepsAuthenticator.UnitTests {
+    
+    [TestFixture]
+    public class UsedCodesManagerTests {
+
+        [Test]
+        public void Can_add_codes() {
+            var manager = new UsedCodesManager();
+
+            Assert.IsFalse(manager.IsCodeUsed("abc", "def"));
+            manager.AddCode("abc", "def");
+            Assert.IsTrue(manager.IsCodeUsed("abc", "def"));
+        }
+
+    }
+}