feat(three-stage-scan): add language recipes with inconclusive fallback

tests/test_regress_recipes.py

@@ -0,0 +1,103 @@
+"""Language recipes for isolated regression snippets (task 5.2)."""
+
+from pathlib import Path
+
+from openultrasast.config import SandboxConfig
+from openultrasast.regress import INCONCLUSIVE, RegressionRunner
+from openultrasast.regress.recipes import recipe_for
+from openultrasast.sandbox import FakeSandboxRunner, SandboxJob
+
+LIMITS = SandboxConfig(memory_mb=256, timeout_seconds=30, pids_limit=128)
+PYTHON_SNIPPET = "assert 1 + 1 == 2\n"
+JS_SNIPPET = "console.log('ok')\n"
+C_SNIPPET = "int main(void) { return 0; }\n"
+JAVA_SNIPPET = "class Case { public static void main(String[] args) {} }\n"
+
+
+def _repo(tmp_path: Path) -> Path:
+    repo = tmp_path / "repo"
+    repo.mkdir()
+    return repo
+
+
+def test_python_recipe_runs_scratch_snippet_with_repo_on_pythonpath(tmp_path: Path) -> None:
+    repo = _repo(tmp_path)
+    job = recipe_for("python", PYTHON_SNIPPET, "python:3.12-alpine", LIMITS, repo_root=repo)
+
+    assert isinstance(job, SandboxJob)
+    joined = " ".join(job.command)
+    assert job.image == "python:3.12-alpine"
+    assert job.repo_root == repo
+    assert job.scratch_files == {"case.py": PYTHON_SNIPPET}
+    assert "python" in job.command
+    assert "/scratch/case.py" in job.command
+    assert "PYTHONPATH=/workspace" in joined
+    assert job.timeout_seconds == LIMITS.timeout_seconds
+    assert job.memory_mb == LIMITS.memory_mb
+    assert job.pids_limit == LIMITS.pids_limit
+
+
+def test_javascript_recipe_runs_scratch_snippet_with_repo_on_node_path(tmp_path: Path) -> None:
+    repo = _repo(tmp_path)
+    job = recipe_for("javascript", JS_SNIPPET, "node:22-alpine", LIMITS, repo_root=repo)
+
+    assert isinstance(job, SandboxJob)
+    joined = " ".join(job.command)
+    assert job.image == "node:22-alpine"
+    assert job.repo_root == repo
+    assert job.scratch_files == {"case.js": JS_SNIPPET}
+    assert "node" in job.command
+    assert "/scratch/case.js" in job.command
+    assert "NODE_PATH=/workspace" in joined
+    assert job.timeout_seconds == LIMITS.timeout_seconds
+    assert job.memory_mb == LIMITS.memory_mb
+    assert job.pids_limit == LIMITS.pids_limit
+
+
+def test_c_recipe_compiles_and_runs_when_image_has_compiler(tmp_path: Path) -> None:
+    repo = _repo(tmp_path)
+    job = recipe_for("c", C_SNIPPET, "gcc:13", LIMITS, repo_root=repo)
+
+    assert isinstance(job, SandboxJob)
+    joined = " ".join(job.command)
+    assert job.scratch_files == {"case.c": C_SNIPPET}
+    assert "cc" in joined
+    assert "/scratch/case.c" in joined
+    assert "-o" in joined
+    assert "/scratch/case" in joined
+
+
+def test_unknown_language_recipe_is_none(tmp_path: Path) -> None:
+    repo = _repo(tmp_path)
+    assert recipe_for("java", JAVA_SNIPPET, "eclipse-temurin:21", LIMITS, repo_root=repo) is None
+    assert recipe_for("unknown", "print(1)\n", "python:3.12-alpine", LIMITS, repo_root=repo) is None
+
+
+def test_python_and_javascript_recipes_produce_runner_jobs(tmp_path: Path) -> None:
+    repo = _repo(tmp_path)
+    python_job = recipe_for("python", PYTHON_SNIPPET, "python:3.12-alpine", LIMITS, repo_root=repo)
+    js_job = recipe_for("javascript", JS_SNIPPET, "node:22-alpine", LIMITS, repo_root=repo)
+    sandbox = FakeSandboxRunner()
+    runner = RegressionRunner(sandbox)
+
+    python_verdict = runner.run_recipe("python", PYTHON_SNIPPET, "python:3.12-alpine", LIMITS, repo_root=repo)
+    js_verdict = runner.run_recipe("javascript", JS_SNIPPET, "node:22-alpine", LIMITS, repo_root=repo)
+
+    assert python_job is not None
+    assert js_job is not None
+    assert python_verdict.reason != "missing_recipe"
+    assert js_verdict.reason != "missing_recipe"
+    assert sandbox.jobs == [python_job, js_job]
+
+
+def test_unknown_language_returns_inconclusive_without_calling_runner(tmp_path: Path) -> None:
+    repo = _repo(tmp_path)
+    sandbox = FakeSandboxRunner()
+    runner = RegressionRunner(sandbox)
+
+    assert recipe_for("java", JAVA_SNIPPET, "eclipse-temurin:21", LIMITS, repo_root=repo) is None
+    verdict = runner.run_recipe("java", JAVA_SNIPPET, "eclipse-temurin:21", LIMITS, repo_root=repo)
+
+    assert verdict.verdict == INCONCLUSIVE
+    assert verdict.reason == "missing_recipe"
+    assert sandbox.jobs == []