"""Tests for the AST-based forbidden-pattern validator."""
from forgeenv.sandbox.ast_validator import validate_script


def test_clean_script_passes():
    script = """
import torch
from transformers import Trainer
model = Trainer()
"""
    result = validate_script(script)
    assert result.is_valid, f"Clean script should pass: {result.violations}"


def test_os_import_fails():
    script = "import os\nos.system('rm -rf /')"
    result = validate_script(script)
    assert not result.is_valid
    assert any("os" in v for v in result.violations)


def test_subprocess_fails():
    script = "import subprocess\nsubprocess.run(['ls'])"
    result = validate_script(script)
    assert not result.is_valid


def test_eval_fails():
    script = "result = eval('1+1')"
    result = validate_script(script)
    assert not result.is_valid
    assert any("eval" in v for v in result.violations)


def test_syntax_error_fails():
    script = "def foo(\n  broken syntax"
    result = validate_script(script)
    assert not result.is_valid
    assert any("SyntaxError" in v for v in result.violations)


def test_transformers_import_passes():
    script = """
from transformers import AutoModelForSequenceClassification, Trainer, TrainingArguments
from datasets import load_dataset
import torch
"""
    result = validate_script(script)
    assert result.is_valid


def test_socket_import_fails():
    script = "import socket\ns = socket.socket()"
    result = validate_script(script)
    assert not result.is_valid


def test_builtins_assignment_fails():
    script = "__builtins__ = {}"
    result = validate_script(script)
    assert not result.is_valid


def test_attribute_eval_fails():
    """eval accessed via attribute (e.g. ast.literal_eval is fine, but
    something.eval() of certain shape should be flagged when name is exec)."""
    script = "obj.exec('rm -rf /')"
    result = validate_script(script)
    assert not result.is_valid