Add trivial tests to ensure metadata consistency between pyroject and module

tests/test_metadata.py

@@ -0,0 +1,39 @@
+"""Ensure that the pyproject and module metadata never drift out of sync
+
+The next best thing to having one source of truth is having a way to ensure all of your
+sources of truth agree with each other.
+"""
+from pathlib import Path
+
+import toml
+
+import tox_poetry_installer
+
+
+def test_metadata():
+    """Test that module metadata matches pyproject poetry metadata"""
+
+    with (Path(__file__).resolve().parent / ".." / "pyproject.toml").open() as infile:
+        pyproject = toml.load(infile, _dict=dict)
+
+    assert pyproject["tool"]["poetry"]["name"] == tox_poetry_installer.__title__
+    assert pyproject["tool"]["poetry"]["version"] == tox_poetry_installer.__version__
+    assert pyproject["tool"]["poetry"]["license"] == tox_poetry_installer.__license__
+    assert (
+        pyproject["tool"]["poetry"]["description"] == tox_poetry_installer.__summary__
+    )
+    assert pyproject["tool"]["poetry"]["repository"] == tox_poetry_installer.__url__
+    assert (
+        all(
+            item in tox_poetry_installer.__authors__
+            for item in pyproject["tool"]["poetry"]["authors"]
+        )
+        is True
+    )
+    assert (
+        all(
+            item in pyproject["tool"]["poetry"]["authors"]
+            for item in tox_poetry_installer.__authors__
+        )
+        is True
+    )