add tests for minicfg

tests/test_minicfg.py

@@ -0,0 +1,95 @@
+import unittest
+from unittest.mock import MagicMock, patch, mock_open
+from minicfg import Minicfg, minicfg_prefix, minicfg_provider
+from minicfg.field import Field, AbstractField, _NOT_SET
+from minicfg.provider import AbstractProvider, EnvProvider
+from minicfg.exceptions import FieldConflictError, FieldValueNotProvidedError
+
+
+# Mock Field and AbstractProvider for testing purposes
+class MockField(Field):
+    def __init__(self, name=None, default=_NOT_SET, caster=None, attach_file_field=False):
+        super().__init__(name, default, caster, attach_file_field)
+
+    def name_with_prefix(self, prefix):
+        return f"{prefix}{self.name}" if prefix else self.name
+
+
+class MockProvider(AbstractProvider):
+    def __init__(self, values):
+        self.values = values
+
+    def get(self, key: str) -> str | None:
+        return self.values.get(key)
+
+
+class TestMinicfg(unittest.TestCase):
+
+    def setUp(self):
+        self.provider = MockProvider({
+            "testfield1": "value1",
+            "testfield2": "value2",
+            "testfield1_FILE": "file_content"
+        })
+        self.minicfg = Minicfg(prefix="test", provider=self.provider)
+
+    @patch('minicfg.minicfg._read_raw_value_from_file', return_value="file_content")
+    def test_populate(self, mock_read):
+        field = MockField(name="field1")
+        self.minicfg.field1 = field
+
+        self.minicfg.populate()
+
+        self.assertTrue(self.minicfg.is_populated)
+        self.assertEqual("value1", self.minicfg.field1.value)
+
+    def test_field_conflict_error(self):
+        field = MockField(name="field1", attach_file_field=True)
+        self.minicfg.field1 = field
+        file_field = MockField(name="field1_FILE")
+        self.minicfg.field1_FILE = file_field
+
+        with self.assertRaises(FieldConflictError):
+            self.minicfg.populate()
+
+    def test_field_value_not_provided_error(self):
+        field = MockField(name="field3")
+        self.minicfg.field3 = field
+
+        with self.assertRaises(FieldValueNotProvidedError):
+            self.minicfg.populate()
+
+    def test_dict_method(self):
+        field = MockField(name="field1")
+        self.minicfg.field1 = field
+        self.minicfg.populate()
+
+        result = self.minicfg.dict()
+        self.assertIn("field1", result)
+        self.assertEqual(result["field1"], "value1")
+
+    def test_dict_not_populated(self):
+        with self.assertRaises(RuntimeError):
+            self.minicfg.dict()
+
+    def test_minicfg_prefix_decorator(self):
+        @minicfg_prefix("prefix")
+        class PrefixedMinicfg(Minicfg):
+            pass
+
+        obj = PrefixedMinicfg()
+        self.assertEqual(obj._prefix, "prefix_")
+
+    def test_minicfg_provider_decorator(self):
+        mock_provider = MagicMock()
+
+        @minicfg_provider(mock_provider)
+        class ProviderMinicfg(Minicfg):
+            pass
+
+        obj = ProviderMinicfg()
+        self.assertEqual(obj._default_provider, mock_provider)
+
+
+if __name__ == "__main__":
+    unittest.main()