test

My project/Library/PackageCache/com.unity.ugui/Tests/Runtime/UGUI/Image/TestableImage.cs

@@ -0,0 +1,28 @@
+using NUnit.Framework;
+using UnityEngine.UI;
+using System.Reflection;
+
+public class TestableImage : Image
+{
+    public bool isOnPopulateMeshCalled = false;
+    public bool isGeometryUpdated = false;
+
+    // Hook into the mesh generation so we can do our check.
+    protected override void OnPopulateMesh(VertexHelper toFill)
+    {
+        base.OnPopulateMesh(toFill);
+        Assert.That(toFill.currentVertCount, Is.GreaterThan(0), "Expected the mesh to be filled but it was not. Should not have a mesh with zero vertices.");
+        isOnPopulateMeshCalled = true;
+    }
+
+    protected override void UpdateGeometry()
+    {
+        base.UpdateGeometry();
+        isGeometryUpdated = true;
+    }
+
+    public void GenerateImageData(VertexHelper vh)
+    {
+        OnPopulateMesh(vh);
+    }
+}