Update unique identifier name record when renaming font.

Author: fabiocaccamo

fontbro/font.py

@@ -982,10 +982,18 @@ def rename(self, family_name="", style_name="", style_flags=True):
                 f" ({postscript_name_length} characters)."
             )
 
+        # update unique identifier
+        postscript_name_old = self.get_name(self.NAME_POSTSCRIPT_NAME)
+        unique_identifier = self.get_name(self.NAME_UNIQUE_IDENTIFIER)
+        unique_identifier = unique_identifier.replace(
+            postscript_name_old, postscript_name
+        )
+
         # update name records
         names = {
             self.NAME_FAMILY_NAME: family_name,
             self.NAME_SUBFAMILY_NAME: subfamily_name,
+            self.NAME_UNIQUE_IDENTIFIER: unique_identifier,
             self.NAME_FULL_NAME: full_name,
             self.NAME_POSTSCRIPT_NAME: postscript_name,
             self.NAME_TYPOGRAPHIC_FAMILY_NAME: typographic_family_name,

tests/test_rename.py

@@ -29,6 +29,15 @@ def test_rename_with_family_name_only(self):
         self.assertEqual(names[Font.NAME_TYPOGRAPHIC_FAMILY_NAME], "Roboto Mono New")
         self.assertEqual(names[Font.NAME_TYPOGRAPHIC_SUBFAMILY_NAME], "Regular")
 
+    def test_rename_update_unique_identifier(self):
+        # https://github.com/fabiocaccamo/python-fontbro/issues/62
+        font = self._get_font("/Roboto_Mono/static/RobotoMono-Regular.ttf")
+        family_name = font.get_name(key=Font.NAME_FAMILY_NAME)
+        family_name = family_name.replace("Mono", "Multi")
+        font.rename(family_name=family_name)
+        font_uid = font.get_name(Font.NAME_UNIQUE_IDENTIFIER)
+        self.assertEqual(font_uid, "3.000;GOOG;RobotoMulti-Regular")
+
     def test_rename_with_style_name_only(self):
         font = self._get_font("/Roboto_Mono/static/RobotoMono-Regular.ttf")
         font.rename("", "Bold Italic")