build: subpackages implementation (#164)

* migrate to hatch

* reorder tests

* generic fixtures

* straight forward conftest

* fix docs generation

* fix tox environments

* reformat tomls

* cleanup pyproject

* some play with renaming

* move root conftest into pytest plugins

* fix setup script

* move fixtures to __init__.py

* remove duplicate fixtures

* disable pylint warning

* simplify configuration fixture

* remove empty conftest

* remove crap from local pyprojects

tests/test_tests.py

@@ -0,0 +1,51 @@
+from pathlib import Path
+
+from ahriman.core.utils import walk
+
+
+def _test_path(source_root: Path, source_file: Path) -> Path:
+    """
+    generate expected test path for source file
+
+    Args:
+        source_root(Path): package source root
+        source_file(Path): source file
+
+    Returns:
+        Path: expected test file path
+    """
+    relative_path = source_file.relative_to(source_root)
+
+    match relative_path.parts:
+        # some workaround for well known files
+        case ("ahriman", "application", "handlers", *_, source_name) if source_name != "handler.py":
+            return relative_path.parent / f"test_handler_{source_name}"
+        case ("ahriman", "web", "views", "api", source_name):
+            return relative_path.parent / f"test_view_api_{source_name}"
+        case ("ahriman", "web", "views", version, api, source_name) if version in ("v1", "v2"):
+            return relative_path.parent / f"test_view_{version}_{api}_{source_name}"
+        case ("ahriman", "web", "views", *_, source_name):
+            if source_name.endswith("_guard.py"):
+                return relative_path.parent / f"test_{source_name}"
+            else:
+                return relative_path.parent / f"test_view_{source_name}"
+        case _:
+            return relative_path.parent / f"test_{source_file.name}"
+
+
+def test_test_coverage() -> None:
+    """
+    must have test files for each source file
+    """
+    package_roots = [
+        Path("ahriman-core"),
+        Path("ahriman-triggers"),
+        Path("ahriman-web"),
+    ]
+
+    for package_root in package_roots:
+        source_root = package_root / "src"
+
+        for source_file in filter(lambda fn: fn.suffix == ".py" and fn.name != "__init__.py", walk(source_root)):
+            test_file = package_root / "tests" / _test_path(source_root, source_file)
+            assert test_file.is_file(), test_file