[librsvg/svenfoo/librsvg-fix-new-clippy-warnings: 4/6] Add test for PathOrUrl("")

[Federico Mena Quintero <federico src gnome org>]

commit e0f4675f4b34a64bc1907905dc2bfccd7e36c83e
Author: Sven Neumann <sven svenfoo org>
Date:   Fri Feb 12 23:19:59 2021 +0100

    Add test for PathOrUrl("")
    
    This test shows our expectations, and it fails because the GFile we
    get from PathOrUrl::get_gfile() actually points to the current working
    directory.
    
    Just adding this here for discussion, eventually this needs to be
    fixed elsewhere, or we need to adjust our expectations.

 src/c_api/handle.rs | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
---
diff --git a/src/c_api/handle.rs b/src/c_api/handle.rs
index c25e3630..d1218956 100644
--- a/src/c_api/handle.rs
+++ b/src/c_api/handle.rs
@@ -2312,6 +2312,21 @@ mod tests {
         }
     }
 
+    #[test]
+    fn path_or_url_empty_str() {
+        unsafe {
+            let path = PathOrUrl::new(b"\0" as *const u8 as *const _);
+
+            match &path {
+                PathOrUrl::Path(_) => (),
+                _ => panic!("empty string should be a PathOrUrl::Path"),
+            }
+
+            let file = path.get_gfile();
+            assert_eq!(file.get_basename(), Some(PathBuf::new()))
+        }
+    }
+
     #[test]
     fn base_url_works() {
         let mut u = BaseUrl::default();