Test

Author: kornelski

tests/files/c2pa-signed.png

@@ -42,6 +42,19 @@ fn optimize() {
     assert!(result.is_ok());
 }
 
+#[test]
+fn skip_c2pa() {
+    let result = oxipng::optimize(
+        &"tests/files/c2pa-signed.png".into(),
+        &OutFile::None,
+        &Options {
+            strip: StripChunks::None,
+            ..Options::default()
+        },
+    );
+    assert!(matches!(result, Err(PngError::C2PAMetadataPreventsChanges)));
+}
+
 #[test]
 fn optimize_corrupted() {
     let result = oxipng::optimize(