🧪 Improve the test base, but it's not working yet

cfig/tests/test_all.py

@@ -1,43 +1,85 @@
 import pytest
 import cfig
+import os
+import lazy_object_proxy
 
 
-def test_config(monkeypatch):
+class TestConfig:
-    config = cfig.Configuration()
+    def test_creation(self):
+        self.config = cfig.Configuration()
 
-    @config.required()
+        assert isinstance(self.config, cfig.Configuration)
+        assert self.config.sources == cfig.Configuration.DEFAULT_SOURCES
+
+    def test_required(self):
+        @self.config.required()
         def FIRST_NUMBER(val: str) -> int:
             """The first number to sum."""
             return int(val)
 
-    @config.optional()
+        assert isinstance(FIRST_NUMBER, lazy_object_proxy.Proxy)
+        assert callable(FIRST_NUMBER.__factory__)
+        assert not FIRST_NUMBER.__resolved__
+
+        assert self.config.items["FIRST_NUMBER"] is FIRST_NUMBER
+        assert self.config.docs["FIRST_NUMBER"] == """The first number to sum."""
+
+        self.FIRST_NUMBER = FIRST_NUMBER
+
+    def test_optional(self):
+        @self.config.optional()
         def SECOND_NUMBER(val: str) -> int:
             """The second number to sum."""
             return int(val)
 
-    # Assert the two configuration items have been registered
+        assert isinstance(SECOND_NUMBER, lazy_object_proxy.Proxy)
-    assert "FIRST_NUMBER" in config.items
+        assert callable(SECOND_NUMBER.__factory__)
-    assert "FIRST_NUMBER" in config.docs
+        assert not SECOND_NUMBER.__resolved__
-    assert "SECOND_NUMBER" in config.items
-    assert "SECOND_NUMBER" in config.docs
 
-    # Assert docstrings are accessible even if the two items aren't
+        assert self.config.items["SECOND_NUMBER"] is SECOND_NUMBER
-    assert config.docs["FIRST_NUMBER"] == """The first number to sum."""
+        assert self.config.docs["SECOND_NUMBER"] == """The second number to sum."""
-    assert config.docs["SECOND_NUMBER"] == """The second number to sum."""
+
+        self.SECOND_NUMBER = SECOND_NUMBER
+
+    def test_fetch_missing(self, monkeypatch):
+        monkeypatch.setenv("FIRST_NUMBER", "")
+        monkeypatch.setenv("SECOND_NUMBER", "")
+
+        assert not os.environ.get("FIRST_NUMBER")
+        assert not os.environ.get("SECOND_NUMBER")
 
-    # Assert that an error is raised if items are fetched without any value set
         with pytest.raises(cfig.MissingValueError):
-        config.fetch_all()
+            self.config.fetch_all()
 
-    # Setup the environment
+    def test_fetch_required(self, monkeypatch):
         monkeypatch.setenv("FIRST_NUMBER", "1")
+        monkeypatch.setenv("SECOND_NUMBER", "")
 
-    # Assert that no error is raised with all required values set
+        assert os.environ.get("FIRST_NUMBER") == "1"
-    config.fetch_all()
+        assert not os.environ.get("SECOND_NUMBER")
 
-    # Assert the two variables have the correct values
+        self.config.fetch_all()
-    assert FIRST_NUMBER == 1
-    assert SECOND_NUMBER == None
 
-    # Please note that SECOND_NUMBER is not the same instance as None, as it is a lazy object proxy!
+        # noinspection PyUnresolvedReferences
-    assert SECOND_NUMBER is not None
+        assert self.FIRST_NUMBER.__resolved__
+        assert self.FIRST_NUMBER == 1
+        # noinspection PyUnresolvedReferences
+        assert self.SECOND_NUMBER.__resolved__
+        assert self.SECOND_NUMBER == None
+        assert self.SECOND_NUMBER is not None
+
+    def test_fetch_optional(self, monkeypatch):
+        monkeypatch.setenv("FIRST_NUMBER", "1")
+        monkeypatch.setenv("SECOND_NUMBER", "2")
+
+        assert os.environ.get("FIRST_NUMBER") == "1"
+        assert os.environ.get("FIRST_NUMBER") == "2"
+
+        self.config.fetch_all()
+
+        # noinspection PyUnresolvedReferences
+        assert self.FIRST_NUMBER.__resolved__
+        assert self.FIRST_NUMBER == 1
+        # noinspection PyUnresolvedReferences
+        assert self.SECOND_NUMBER.__resolved__
+        assert self.SECOND_NUMBER == 2