Add tests for config module

Add toml test dependency to toxfile
Add missing predump and postload hooks to top-level config serializer
Remove dummy paceholder test

keyosk/config/__init__.py

@@ -1,7 +1,10 @@
 """Application configuration settings containers and loading functions"""
 import os
+from dataclasses import asdict
 from dataclasses import dataclass
 from pathlib import Path
+from typing import Any
+from typing import Mapping
 from typing import Optional
 from typing import Union
 
@@ -29,6 +32,18 @@ class ConfigSerializer(msh.Schema):
 
     storage = msh.fields.Nested(StorageConfigSerializer)
 
+    @msh.post_load
+    def _make_dataclass(self, data: Mapping[str, Any], *args, **kwargs):
+        return KeyoskConfig(**data)
+
+    @msh.pre_dump
+    def _unmake_dataclass(
+        self, data: Union[Mapping[str, Any], KeyoskConfig], *args, **kwargs
+    ):
+        if isinstance(data, KeyoskConfig):
+            return asdict(data)
+        return data
+
 
 def load(source: Optional[Union[str, Path]] = None) -> KeyoskConfig:
     """Load the configuration data

tests/test_config.py

@@ -0,0 +1,57 @@
+import os
+from pathlib import Path
+
+import toml
+
+from keyosk import config
+from keyosk import constants
+from keyosk import datatypes
+
+
+TEST_CONFIG = {
+    "storage": {
+        "backend": "maria",
+        "sqlite": {
+            "path": "/foo/bar/baz.db",
+            "pragmas": {"foo": 1, "bar": "buzz", "baz": ["dog", "cat"]},
+        },
+        "maria": {
+            "schema": "authentifiy",
+            "host": "10.20.30.40",
+            "port": 6033,
+            "username": "qwerty",
+            "password": "uiop",
+        },
+    }
+}
+
+
+def test_default():
+    assert config.load() == config.KeyoskConfig()
+
+
+def test_roundtrip():
+    serializer = config.ConfigSerializer()
+    loaded = serializer.load(TEST_CONFIG)
+    assert TEST_CONFIG == serializer.dump(loaded)
+    assert loaded == serializer.load(serializer.dump(loaded))
+
+
+def test_settings():
+    loaded = config.ConfigSerializer().load(TEST_CONFIG)
+    assert loaded.storage.backend == datatypes.StorageBackend.MARIA
+    assert loaded.storage.sqlite.path == Path(TEST_CONFIG["storage"]["sqlite"]["path"])
+    assert loaded.storage.sqlite.pragmas == TEST_CONFIG["storage"]["sqlite"]["pragmas"]
+    for key, value in TEST_CONFIG["storage"]["maria"].items():
+        assert getattr(loaded.storage.maria, key) == value
+
+
+def test_filepath(tmp_path):
+    tmp_file = Path(tmp_path, "conf.toml")
+    os.environ[constants.ENV_CONFIG_PATH] = str(tmp_file)
+    with tmp_file.open("w+") as outfile:
+        toml.dump(TEST_CONFIG, outfile)
+
+    assert config.load(tmp_file) == config.ConfigSerializer().load(TEST_CONFIG)
+    tmp_file.unlink()
+    assert config.load(tmp_file) == config.KeyoskConfig()

tests/test_nothing.py

@@ -1,2 +0,0 @@
-def test_nothing():
-    pass

tox.ini

@@ -7,6 +7,7 @@ description = Run the unit tests (pytest)
 deps =
     pytest
     pytest-cov
+    toml
 commands =
     pytest --cov={envsitepackagesdir}/keyosk --cov-config .coveragerc tests/ --cov-report term-missing