.github/scripts/test_check_app_terraform_isolation.py

#!/usr/bin/env python3
"""Tests for check_app_terraform_isolation."""

from __future__ import annotations

import unittest

from check_app_terraform_isolation import first_isolation_violation, isolation_violation

APP_PATHS = "src/\npackage.json\npackage-lock.json\n"


class IsolationTests(unittest.TestCase):
    def test_terraform_only(self) -> None:
        self.assertIsNone(
            isolation_violation(
                ["terraform/lambda.tf", "terraform/README.md"],
                APP_PATHS,
            )
        )

    def test_app_only(self) -> None:
        self.assertIsNone(
            isolation_violation(
                ["src/processPaymentCsv.js", "package.json", "package-lock.json"],
                APP_PATHS,
            )
        )

    def test_docs_and_workflows_with_terraform(self) -> None:
        self.assertIsNone(
            isolation_violation(
                [
                    "terraform/lambda.tf",
                    ".github/workflows/deploy.yaml",
                    "SETUP.md",
                    "scripts/check_app_terraform_isolation.py",
                ],
                APP_PATHS,
            )
        )

    def test_mixed_app_and_terraform_fails(self) -> None:
        violation = isolation_violation(
            ["terraform/lambda.tf", "src/processPaymentCsv.js", "package.json"],
            APP_PATHS,
        )
        self.assertIsNotNone(violation)
        terraform_files, app_files = violation or ([], [])
        self.assertEqual(terraform_files, ["terraform/lambda.tf"])
        self.assertEqual(app_files, ["package.json", "src/processPaymentCsv.js"])

    def test_empty_app_paths_skips(self) -> None:
        self.assertIsNone(
            isolation_violation(
                ["terraform/lambda.tf", "src/processPaymentCsv.js"],
                "",
            )
        )

    def test_separate_commits_pass_when_classified_alone(self) -> None:
        self.assertIsNone(
            first_isolation_violation(
                [
                    ["terraform/lambda.tf"],
                    ["src/processPaymentCsv.js"],
                ],
                APP_PATHS,
            )
        )

    def test_union_of_separate_commits_fails(self) -> None:
        violation = isolation_violation(
            ["terraform/lambda.tf", "src/processPaymentCsv.js"],
            APP_PATHS,
        )
        self.assertIsNotNone(violation)


if __name__ == "__main__":
    unittest.main()