feat: add the start of the templates testing architecture

Author: 56kyle

tests/__init__.py

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+"""Tests for cookiecutter-robust-python."""

tests/conftest.py

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+"""Fixtures used in all tests for cookiecutter-robust-python."""
+import json
+import os
+from pathlib import Path
+from typing import Any, Generator
+
+import platformdirs
+import pytest
+from _pytest.fixtures import FixtureRequest
+from _pytest.tmpdir import TempPathFactory
+from cookiecutter.main import cookiecutter
+
+
+pytest_plugins: list[str] = ["pytester"]
+
+
+REPO_FOLDER: Path = Path(__file__).parent.parent
+COOKIECUTTER_FOLDER: Path = REPO_FOLDER / "{{cookiecutter.project_name}}"
+HOOKS_FOLDER: Path = REPO_FOLDER / "hooks"
+SCRIPTS_FOLDER: Path = REPO_FOLDER / "scripts"
+
+COOKIECUTTER_JSON_PATH: Path = COOKIECUTTER_FOLDER / "cookiecutter.json"
+COOKIECUTTER_JSON: dict[str, Any] = json.loads(COOKIECUTTER_JSON_PATH.read_text())
+
+
+@pytest.fixture(scope="session")
+def robust_python_demo_path(tmp_path_factory: TempPathFactory) -> Path:
+    """Creates a temporary example python project for testing against and returns its Path."""
+    demos_path: Path = tmp_path_factory.mktemp("demos")
+    cookiecutter(
+        str(REPO_FOLDER),
+        no_input=True,
+        overwrite_if_exists=True,
+        output_dir=demos_path,
+        extra_context={
+            "project_name": "robust-python-demo",
+            "add_rust_extension": False
+        }
+    )
+    return demos_path / "robust-python-demo"
+
+
+@pytest.fixture(scope="session")
+def robust_maturin_demo_path(tmp_path_factory: TempPathFactory) -> Path:
+    """Creates a temporary example maturin project for testing against and returns its Path."""
+    demos_path: Path = tmp_path_factory.mktemp("demos")
+    cookiecutter(
+        str(REPO_FOLDER),
+        no_input=True,
+        overwrite_if_exists=True,
+        output_dir=demos_path,
+        extra_context={
+            "project_name": "robust-maturin-demo",
+            "add_rust_extension": True
+        }
+    )
+    return demos_path / "robust-maturin-demo"
+
+
+@pytest.fixture(scope="function")
+def inside_robust_python_demo(robust_python_demo_path: Path) -> Generator[Path, None, None]:
+    """Changes the current working directory to the robust-python-demo project."""
+    original_path: Path = Path.cwd()
+    os.chdir(robust_python_demo_path)
+    yield robust_python_demo_path
+    os.chdir(original_path)
+
+

tests/integration_tests/__init__.py

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+"""Integration tests for cookiecutter-robust-python."""
+

tests/integration_tests/conftest.py

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+"""Fixtures used in integration tests for cookiecutter-robust-python."""