Update transform2d_test.rs

Author: Ughuuu

itest/rust/src/builtin_tests/geometry/transform2d_test.rs

@@ -40,11 +40,6 @@ fn transform2d_equiv() {
         assert_eq_approx!(inner, outer, "function: {name}\n");
     }
 
-    assert_eq_approx!(
-        real::from_f64(inner.determinant()),
-        outer.determinant(),
-        "function: determinant\n"
-    );
     assert_eq_approx!(
         real::from_f64(inner.get_rotation()),
         outer.rotation(),
@@ -62,6 +57,19 @@ fn transform2d_equiv() {
     );
 }
 
+#[cfg(since_api = "4.1")]
+#[itest]
+fn transform2d_determinant() {
+    let inner = InnerTransform2D::from_outer(&TEST_TRANSFORM);
+    let outer = TEST_TRANSFORM;
+
+    assert_eq_approx!(
+        real::from_f64(inner.determinant()),
+        outer.determinant(),
+        "function: determinant\n"
+    );
+}
+
 #[itest]
 fn transform2d_xform_equiv() {
     let vec = Vector2::new(1.0, 2.0);