test for unnamed meshes

empty_name_triangle.obj

@@ -0,0 +1,6 @@
+# A simple triangle object for testing
+v 0 0 0
+v 1 0 0
+v 0 1 0
+
+f -3 -2 -1

tests/lib.rs

@@ -33,6 +33,30 @@ fn simple_triangle() {
     assert_eq!(mesh.indices, expect_idx);
 }
 
+#[test]
+fn empty_name_triangle() {
+    let m = tobj::load_obj(&Path::new("empty_name_triangle.obj"));
+    assert!(m.is_ok());
+    let (models, mats) = m.unwrap();
+    // We expect a single model with no materials
+    assert_eq!(models.len(), 1);
+    assert!(mats.is_empty());
+    // Confirm our triangle is loaded correctly
+    assert_eq!(models[0].name, "unnamed_object");
+    let mesh = &models[0].mesh;
+    assert!(mesh.normals.is_empty());
+    assert!(mesh.texcoords.is_empty());
+    assert_eq!(mesh.material_id, None);
+
+    // Verify each position is loaded properly
+    let expect_pos = vec![0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 1.0, 0.0];
+    assert_eq!(mesh.positions, expect_pos);
+    // Verify the indices are loaded properly
+    let expect_idx = vec![0, 1, 2];
+    assert_eq!(mesh.indices, expect_idx);
+}
+
+
 #[test]
 fn multiple_face_formats() {
     let m = tobj::load_obj(&Path::new("quad.obj"));