Fix #3024 (comment)

Author: kdeldycke

tests/test_options.py

@@ -1653,6 +1653,34 @@ def cli(one, two):
         runner.invoke(cli, [])
 
 
+def test_custom_type_click_class_flag_value(runner):
+    """A reproduction of
+    https://github.com/pallets/click/issues/3024#issuecomment-3146511356
+    """
+
+    NO_CONFIG = object()
+
+    class ConfigParamType(click.ParamType):
+        name = "config"
+
+        def convert(self, value, param, ctx):
+            if value is NO_CONFIG:
+                return value
+            else:
+                return click.Path(exists=True, dir_okay=False).convert(
+                    value, param, ctx
+                )
+
+    @click.command()
+    @click.option("-c", "--config", type=ConfigParamType())
+    @click.option("--no-config", "config", flag_value=NO_CONFIG, type=ConfigParamType())
+    def main(config):
+        click.echo(repr(config), nl=False)
+
+    result = runner.invoke(main)
+    assert result.output == repr(None)
+
+
 class EngineType(enum.Enum):
     OSS = enum.auto()
     PRO = enum.auto()
@@ -1694,23 +1722,29 @@ def scan(pro):
     assert result.output == expected
 
 
-def test_custom_type_click_class_flag_value(runner):
+@pytest.mark.parametrize(
+    ("args", "expected"),
+    [
+        ([], None),
+        (["--oss"], EngineType.OSS),
+        (["--pro"], EngineType.PRO),
+    ],
+)
+def test_unprocessed_type_enum_flag_value_shared_valiable(runner, args, expected):
     """A reproduction of
-    https://github.com/pallets/click/issues/3024#issuecomment-3146511356
+    https://github.com/pallets/click/issues/3024#issuecomment-3146508536
     """
 
-    NO_CONFIG = object()
+    @click.command()
+    @click.option("--oss", "mode", flag_value=EngineType.OSS, type=click.UNPROCESSED)
+    @click.option("--pro", "mode", flag_value=EngineType.PRO, type=click.UNPROCESSED)
+    def main(mode):
+        click.echo(repr(mode), nl=False)
 
-    class ConfigParamType(click.ParamType):
-        name = "config"
+    result = runner.invoke(main, args)
+    assert result.output == repr(expected)
+    assert result.exit_code == 0
 
-        def convert(self, value, param, ctx):
-            if value is NO_CONFIG:
-                return value
-            else:
-                return click.Path(exists=True, dir_okay=False).convert(
-                    value, param, ctx
-                )
 
     @click.command()
     @click.option("-c", "--config", type=ConfigParamType())