Define __repr__() on (Json|Toml|Yaml)ConfigSettingsSource

Previously, the repr() of those settings source classes was inherited
from InitSettingsSource's thus returning a misleading
'InitSettingsSource(init_kwargs={})'. We define specific a __repr__()
method implementation for classes using a config file (json, toml,
yaml).

pydantic_settings/sources.py

@@ -1951,6 +1951,9 @@ def _read_file(self, file_path: Path) -> dict[str, Any]:
         with open(file_path, encoding=self.json_file_encoding) as json_file:
             return json.load(json_file)
 
+    def __repr__(self) -> str:
+        return f'JsonConfigSettingsSource(json_file={self.json_file_path})'
+
 
 class TomlConfigSettingsSource(InitSettingsSource, ConfigFileSourceMixin):
     """
@@ -1973,6 +1976,9 @@ def _read_file(self, file_path: Path) -> dict[str, Any]:
                 return tomli.load(toml_file)
             return tomllib.load(toml_file)
 
+    def __repr__(self) -> str:
+        return f'TomlConfigSettingsSource(toml_file={self.toml_file_path})'
+
 
 class PyprojectTomlConfigSettingsSource(TomlConfigSettingsSource):
     """
@@ -2045,6 +2051,9 @@ def _read_file(self, file_path: Path) -> dict[str, Any]:
         with open(file_path, encoding=self.yaml_file_encoding) as yaml_file:
             return yaml.safe_load(yaml_file) or {}
 
+    def __repr__(self) -> str:
+        return f'YamlConfigSettingsSource(yaml_file={self.yaml_file_path})'
+
 
 class AzureKeyVaultMapping(Mapping[str, Optional[str]]):
     _loaded_secrets: dict[str, str | None]

tests/test_settings.py

@@ -34,9 +34,12 @@
     DotEnvSettingsSource,
     EnvSettingsSource,
     InitSettingsSource,
+    JsonConfigSettingsSource,
     PydanticBaseSettingsSource,
     SecretsSettingsSource,
     SettingsConfigDict,
+    TomlConfigSettingsSource,
+    YamlConfigSettingsSource,
 )
 from pydantic_settings.sources import DefaultSettingsSource, SettingsError
 
@@ -1797,6 +1800,21 @@ def test_builtins_settings_source_repr():
     )
 
 
+@pytest.mark.parametrize(
+    'cls, expected',
+    (
+        (JsonConfigSettingsSource, 'JsonConfigSettingsSource(json_file=config.json)'),
+        (TomlConfigSettingsSource, 'TomlConfigSettingsSource(toml_file=config.toml)'),
+        (YamlConfigSettingsSource, 'YamlConfigSettingsSource(yaml_file=config.yaml)'),
+    ),
+)
+def test_configfile_settings_source_repr(cls: Type[PydanticBaseSettingsSource], expected: str) -> None:
+    ext = cls.__name__[:4].lower()
+    path = Path(f'config.{ext}')
+    source = cls(BaseSettings(), path)
+    assert repr(source) == expected
+
+
 def _parse_custom_dict(value: str) -> Callable[[str], Dict[int, str]]:
     """A custom parsing function passed into env parsing test."""
     res = {}