config: add rudimentary tests

config/test_config.py

@@ -0,0 +1,63 @@
+import pytest
+
+import os
+from tempfile import mktemp
+from typing import Optional
+
+from config import ConfigStateHolder, Profile
+
+
+def get_filename():
+    return mktemp() + '_pytest.toml'
+
+
+@pytest.fixture
+def conf_filename():
+    f = get_filename()
+    yield f
+
+
+@pytest.fixture
+def empty_config():
+    f = get_filename()
+    with open(f, 'w') as fd:
+        fd.write('')
+    yield f
+    os.unlink(f)
+
+
+def validate_ConfigStateHolder(c: ConfigStateHolder, should_load: Optional[bool] = None):
+    assert isinstance(c, ConfigStateHolder)
+    if should_load is not None:
+        assert c.file_state.load_finished is True
+        assert c.is_loaded() == should_load
+    assert c.file
+
+
+@pytest.mark.parametrize('path_fixture,should_load', [('conf_filename', False), ('empty_config', True)])
+def test_loadstate_is_loaded(path_fixture: str, should_load: bool, request: pytest.FixtureRequest):
+    path = request.getfixturevalue(path_fixture)
+    assert os.path.exists(path) == should_load
+    c = ConfigStateHolder(path)
+    validate_ConfigStateHolder(c, should_load)
+    assert c.file_state.load_finished is True
+    assert (c.file_state.exception is None) == should_load
+    assert c.is_loaded() == should_load
+
+
+def test_config_empty(empty_config: str):
+    c = ConfigStateHolder(empty_config)
+    validate_ConfigStateHolder(c, True)
+
+
+def test_config_nonexistant(conf_filename):
+    assert not os.path.exists(conf_filename)
+    c = ConfigStateHolder(conf_filename)
+    validate_ConfigStateHolder(c, should_load=False)
+
+
+def test_profile():
+    p = None
+    p = Profile()
+    assert p is not None
+    assert isinstance(p, dict)