diff --git a/source/Trek-12/Tests/DeTest.cs b/source/Trek-12/Tests/DeTest.cs
new file mode 100644
index 0000000..7c35638
--- /dev/null
+++ b/source/Trek-12/Tests/DeTest.cs
@@ -0,0 +1,69 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Models;
+
+namespace Tests;
+
+public class DeTest
+{
+    [Fact]
+    public void TestConstructor()
+    {
+        De d = new De();
+        Assert.NotNull(d);
+        Assert.Equal(0, d.NbMin);
+        Assert.Equal(5, d.NbMax);
+    }
+
+    [Fact]
+    public void TestConstructorRebelotteWithInvalidNbMin()
+    {
+        De d = new De(2);
+        Assert.NotNull(d);
+        Assert.Equal(1, d.NbMin);
+        Assert.Equal(6, d.NbMax);
+    }
+
+    [Fact]
+    public void TestConstructorReRebelotteWithAnotherInvalidNbMin()
+    {
+        De d = new De(-2);
+        Assert.NotNull(d);
+        Assert.Equal(0, d.NbMin);
+        Assert.Equal(5, d.NbMax);
+    }
+
+    [Fact]
+    public void TestConstructorRebelotteWithValidNbMin()
+    {
+        De d = new De(1);
+        Assert.NotNull(d);
+        Assert.Equal(1, d.NbMin);
+        Assert.Equal(6, d.NbMax);
+    }
+
+    [Fact]
+    public void TestConstructorRebelotteWithAnotherValidNbMin()
+    {
+        De d = new De(0);
+        Assert.NotNull(d);
+        Assert.Equal(0, d.NbMin);
+        Assert.Equal(5, d.NbMax);
+    }
+
+    [Fact]
+    public void TestLancer()
+    {
+        De d = new De();
+        Assert.NotNull(d);
+        Assert.IsType<int>(d.Nb);
+        Assert.InRange(d.Nb, d.NbMin, d.NbMax);
+    }
+
+
+
+
+}