XMP Boolean to string conversion + unit tests.

2 files changed, 23 insertions, 0 deletions

diff --git a/src/pyexiv2.py b/src/pyexiv2.py
index 5341c86..2c00e2d 100644
--- a/src/pyexiv2.py
+++ b/src/pyexiv2.py
@@ -615,6 +615,21 @@ class XmpTag(MetadataTag):
 
         return value
 
+    @staticmethod
+    def _convert_to_string(value, xtype):
+        """
+        Convert a value to its corresponding string representation.
+        Fallback to str(value) if no standard-compliant conversion can be done.
+        """
+        if xtype == 'Boolean':
+            if value == True:
+                return 'True'
+            elif value == False:
+                return 'False'
+
+        # Default fallback conversion
+        return str(value)
+
     def __str__(self):
         """
         Return a string representation of the XMP tag.
diff --git a/unittest/xmp.py b/unittest/xmp.py
index 9db9434..09aca55 100644
--- a/unittest/xmp.py
+++ b/unittest/xmp.py
@@ -46,6 +46,14 @@ class TestXmpTag(unittest.TestCase):
         # Invalid values: not converted
         self.assertEqual(XmpTag._convert_to_python('invalid', xtype), 'invalid')
 
+    def test_convert_to_string_boolean(self):
+        xtype = 'Boolean'
+        # Valid values
+        self.assertEqual(XmpTag._convert_to_string(True, xtype), 'True')
+        self.assertEqual(XmpTag._convert_to_string(False, xtype), 'False')
+        # Invalid values
+        self.assertEqual(XmpTag._convert_to_string('invalid', xtype), 'invalid')
+
     def test_convert_to_python_choice(self):
         pass