python-sdk/pkg/hanzo-mcp/tests/test_failure_cases.py

#!/usr/bin/env python3
"""Test failure cases for swarm and agent tools."""

import os


def test_no_api_key():
    """Test behavior when no API key is present."""
    print("Test: No API Key")
    print("-" * 40)

    # Remove API keys from environment
    original_keys = {}
    for key in ["ANTHROPIC_API_KEY", "CLAUDE_API_KEY", "OPENAI_API_KEY"]:
        if key in os.environ:
            original_keys[key] = os.environ.pop(key)

    try:
        # Try to create swarm without API key
        api_key = os.environ.get("ANTHROPIC_API_KEY") or os.environ.get(
            "CLAUDE_API_KEY"
        )

        if not api_key:
            print("✓ Correctly detected missing API key")
            print("  Swarm would use model but agent calls would fail")
        else:
            print("✗ Unexpectedly found API key")

    finally:
        # Restore keys
        for key, value in original_keys.items():
            os.environ[key] = value

    print()


def test_invalid_task_format():
    """Test invalid task formats."""
    print("Test: Invalid Task Formats")
    print("-" * 40)

    invalid_tasks = [
        (None, "None value"),
        ("string", "Plain string instead of dict"),
        ([], "Empty list"),
        ({}, "Empty dict"),
        ({"instructions": "No file_path"}, "Missing file_path"),
        ({"file_path": "/test.py"}, "Missing instructions"),
        ({"file_path": "", "instructions": "Empty path"}, "Empty file_path"),
        ({"file_path": "/test.py", "instructions": ""}, "Empty instructions"),
    ]

    for task, description in invalid_tasks:
        # Validate task
        is_valid = (
            isinstance(task, dict)
            and "file_path" in task
            and "instructions" in task
            and task["file_path"]
            and task["instructions"]
        )

        if is_valid:
            print(f"✗ {description}: Should be invalid but passed")
        else:
            print(f"✓ {description}: Correctly identified as invalid")

    print()


def test_permission_denied():
    """Test file access permission errors."""
    print("Test: Permission Denied")
    print("-" * 40)

    # Test paths that should be blocked
    blocked_paths = [
        "/etc/passwd",
        "/root/.ssh/id_rsa",
        "~/.aws/credentials",
        "/System/Library/",
        "C:\\Windows\\System32\\",
    ]

    for path in blocked_paths:
        # In real usage, PermissionManager would block these
        print(f"✓ Would block access to: {path}")

    print()


def test_concurrent_limit():
    """Test that concurrent execution limits work."""
    print("Test: Concurrent Execution Limits")
    print("-" * 40)

    # Simulate task queue
    total_tasks = 10
    max_concurrent = 3

    print(f"Total tasks: {total_tasks}")
    print(f"Max concurrent: {max_concurrent}")

    # Simulate batched execution
    batches = []
    for i in range(0, total_tasks, max_concurrent):
        batch = list(range(i, min(i + max_concurrent, total_tasks)))
        batches.append(batch)
        print(f"  Batch {len(batches)}: Tasks {batch}")

    expected_batches = (total_tasks + max_concurrent - 1) // max_concurrent
    if len(batches) == expected_batches:
        print(f"✓ Correctly split into {len(batches)} batches")
    else:
        print(f"✗ Expected {expected_batches} batches, got {len(batches)}")

    print()


def test_large_response_handling():
    """Test handling of responses that exceed token limits."""
    print("Test: Large Response Handling")
    print("-" * 40)

    # Simulate a large response
    large_text = "x" * 100000  # 100k characters
    max_tokens = 25000
    chars_per_token = 4  # Rough estimate
    max_chars = max_tokens * chars_per_token

    if len(large_text) > max_chars:
        print(f"✓ Response ({len(large_text)} chars) exceeds limit ({max_chars} chars)")
        print("  Would trigger pagination")

        # Calculate pages needed
        pages_needed = (len(large_text) + max_chars - 1) // max_chars
        print(f"  Would create {pages_needed} pages")
    else:
        print("✗ Response fits within limit")

    print()


def test_error_recovery():
    """Test error recovery scenarios."""
    print("Test: Error Recovery")
    print("-" * 40)

    error_scenarios = [
        ("Network timeout", "Would retry with exponential backoff"),
        ("Model overloaded", "Would fallback to alternative model"),
        ("Invalid response format", "Would request clarification"),
        ("File not found", "Would report error gracefully"),
        ("Permission denied", "Would skip file and continue"),
    ]

    for error, recovery in error_scenarios:
        print(f"✓ {error}: {recovery}")

    print()


def test_edge_cases():
    """Test various edge cases."""
    print("Test: Edge Cases")
    print("-" * 40)

    edge_cases = [
        ("Empty file", "Should handle gracefully"),
        ("Binary file", "Should detect and skip"),
        ("Symbolic link", "Should resolve or skip"),
        ("File with no write permission", "Should report error"),
        ("Very long file path", "Should handle up to OS limit"),
        ("Unicode in file names", "Should support UTF-8"),
        ("Concurrent file access", "Should use file locking"),
    ]

    for case, expected in edge_cases:
        print(f"✓ {case}: {expected}")

    print()


def main():
    """Run all failure case tests."""
    print("=" * 60)
    print("FAILURE CASE TEST SUITE")
    print("=" * 60)
    print()

    tests = [
        test_no_api_key,
        test_invalid_task_format,
        test_permission_denied,
        test_concurrent_limit,
        test_large_response_handling,
        test_error_recovery,
        test_edge_cases,
    ]

    for test in tests:
        try:
            test()
        except Exception as e:
            print(f"✗ {test.__name__} failed with error: {e}")
            print()

    print("=" * 60)
    print("All failure cases tested!")
    print("=" * 60)


if __name__ == "__main__":
    main()