[librsvg/librsvg-2.50] Add test with no width/height

[Federico Mena Quintero <federico src gnome org>]

commit 05df1d091f68d6097dfd6955feac266a34698b93
Author: Federico Mena Quintero <federico gnome org>
Date:   Tue Sep 29 16:08:29 2020 -0500

    Add test with no width/height

 librsvg_crate/tests/intrinsic_dimensions.rs | 31 +++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
---
diff --git a/librsvg_crate/tests/intrinsic_dimensions.rs b/librsvg_crate/tests/intrinsic_dimensions.rs
index 10859c43..8307361f 100644
--- a/librsvg_crate/tests/intrinsic_dimensions.rs
+++ b/librsvg_crate/tests/intrinsic_dimensions.rs
@@ -143,6 +143,37 @@ fn layer_geometry_with_viewbox_and_offset_viewport() {
     assert_eq!((ink_r, logical_r), (rect, rect));
 }
 
+#[test]
+fn layer_geometry_with_no_width_height() {
+    let svg = load_svg(
+        br#"<?xml version="1.0" encoding="UTF-8"?>
+<svg xmlns="http://www.w3.org/2000/svg"; viewBox="100 100 200 200">
+  <rect x="110" y="120" width="30" height="40"/>
+</svg>
+"#,
+    );
+
+    let renderer = CairoRenderer::new(&svg);
+
+    let viewport = cairo::Rectangle {
+        x: 100.0,
+        y: 100.0,
+        width: 100.0,
+        height: 100.0,
+    };
+
+    let (ink_r, logical_r) = renderer.geometry_for_layer(None, &viewport).unwrap();
+
+    let rect = cairo::Rectangle {
+        x: 105.0,
+        y: 110.0,
+        width: 15.0,
+        height: 20.0,
+    };
+
+    assert_eq!((ink_r, logical_r), (rect, rect));
+}
+
 #[test]
 fn layer_geometry_with_percent_viewport() {
     let svg = load_svg(