Test raised ValueError on invalid settings file

Author: Julian Vanden Broeck

tests/test_source_json.py

@@ -5,6 +5,7 @@
 import json
 from typing import Tuple, Type, Union
 
+import pytest
 from pydantic import BaseModel
 
 from pydantic_settings import (
@@ -67,6 +68,33 @@ def settings_customise_sources(
     assert s.model_dump() == {}
 
 
+def test_nondict_json_file(tmp_path):
+    p = tmp_path / '.env'
+    p.write_text(
+        """
+        "noway"
+    """
+    )
+
+    class Settings(BaseSettings):
+        foobar: str
+        model_config = SettingsConfigDict(json_file=p)
+
+        @classmethod
+        def settings_customise_sources(
+            cls,
+            settings_cls: Type[BaseSettings],
+            init_settings: PydanticBaseSettingsSource,
+            env_settings: PydanticBaseSettingsSource,
+            dotenv_settings: PydanticBaseSettingsSource,
+            file_secret_settings: PydanticBaseSettingsSource,
+        ) -> Tuple[PydanticBaseSettingsSource, ...]:
+            return (JsonConfigSettingsSource(settings_cls),)
+
+    with pytest.raises(ValueError):
+        Settings()
+
+
 def test_multiple_file_json(tmp_path):
     p5 = tmp_path / '.env.json5'
     p6 = tmp_path / '.env.json6'

tests/test_source_toml.py

@@ -77,6 +77,30 @@ def settings_customise_sources(
     assert s.model_dump() == {}
 
 
+@pytest.mark.skipif(sys.version_info <= (3, 11) and tomli is None, reason='tomli/tomllib is not installed')
+def test_pyproject_nondict_toml(cd_tmp_path):
+    pyproject = cd_tmp_path / 'pyproject.toml'
+    pyproject.write_text(
+        """
+    [tool.pydantic-settings]
+    foobar
+    """
+    )
+
+    class Settings(BaseSettings):
+        foobar: str
+        model_config = SettingsConfigDict()
+
+        @classmethod
+        def settings_customise_sources(
+            cls, settings_cls: Type[BaseSettings], **_kwargs: PydanticBaseSettingsSource
+        ) -> Tuple[PydanticBaseSettingsSource, ...]:
+            return (TomlConfigSettingsSource(settings_cls, pyproject),)
+
+    with pytest.raises(ValueError):
+        Settings()
+
+
 @pytest.mark.skipif(sys.version_info <= (3, 11) and tomli is None, reason='tomli/tomllib is not installed')
 def test_multiple_file_toml(tmp_path):
     p1 = tmp_path / '.env.toml1'

tests/test_source_yaml.py

@@ -85,6 +85,30 @@ def settings_customise_sources(
     assert s.nested.nested_field == 'world!'
 
 
+@pytest.mark.skipif(yaml is None, reason='pyYaml is not installed')
+def test_nondict_yaml_file(tmp_path):
+    p = tmp_path / '.env'
+    p.write_text('test invalid yaml')
+
+    class Settings(BaseSettings):
+        foobar: str
+        model_config = SettingsConfigDict(yaml_file=p)
+
+        @classmethod
+        def settings_customise_sources(
+            cls,
+            settings_cls: Type[BaseSettings],
+            init_settings: PydanticBaseSettingsSource,
+            env_settings: PydanticBaseSettingsSource,
+            dotenv_settings: PydanticBaseSettingsSource,
+            file_secret_settings: PydanticBaseSettingsSource,
+        ) -> Tuple[PydanticBaseSettingsSource, ...]:
+            return (YamlConfigSettingsSource(settings_cls),)
+
+    with pytest.raises(ValueError):
+        Settings()
+
+
 @pytest.mark.skipif(yaml is None, reason='pyYaml is not installed')
 def test_yaml_no_file():
     class Settings(BaseSettings):