[GEMINI] Update tests for empty XMP attributes

tests/test_forensics.py

@@ -342,7 +342,7 @@ def test_exif_cli_options():
     # Verify mutual exclusion error
     result_err = runner.invoke(cli, ["inspect", "-i", "-e", str(test_file)])
     assert result_err.exit_code != 0
-    assert "Cannot specify both" in result_err.output
+    assert "Cannot specify more than one" in result_err.output
     
     # Verify --inode hides EXIF data table
     result_inode = runner.invoke(cli, ["inspect", "-i", str(test_file)])
@@ -584,6 +584,7 @@ def test_adobe_xmp_formatting():
         b"  <rdf:Description rdf:about='' xmlns:xmp='http://ns.adobe.com/xap/1.0/' xmlns:exif='http://ns.adobe.com/exif/1.0/'>\n"
         b"    <xmp:CreatorTool>Photoshop</xmp:CreatorTool>\n"
         b"    <exif:Flash exif:Fired='True' exif:Mode='1'/>\n"
+        b"    <exif:EmptyAttr exif:Value=''/>\n"
         b"  </rdf:Description>\n"
         b"</rdf:RDF>\n"
         b"</x:xmpmeta>"
@@ -606,4 +607,6 @@ def test_adobe_xmp_formatting():
     meta = get_metadata(test_file)
     assert meta.exif_data.get("xmp:CreatorTool") == "Photoshop"
     assert meta.exif_data.get("exif:Flash") == "exif:Fired | True, exif:Mode | 1"
+    assert meta.exif_data.get("exif:EmptyAttr") == "exif:Value"
+    assert "rdf:Description" not in meta.exif_data