349 lines
11 KiB
Python
349 lines
11 KiB
Python
#!/usr/bin/python3
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"""
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Test Error Handling and Recovery
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This script tests error handling and recovery mechanisms to ensure
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the Debian atomic system gracefully handles failures and can recover
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from various error conditions.
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"""
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import os
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import sys
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import subprocess
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import tempfile
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import json
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import time
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import signal
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import threading
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def test_build_failures():
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"""Test handling of build failures"""
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print("Testing build failure handling...")
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with tempfile.TemporaryDirectory() as temp_dir:
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try:
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# Simulate different types of build failures
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failure_scenarios = [
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{
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"type": "package_not_found",
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"description": "Package not found in repository",
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"expected_behavior": "fail_gracefully"
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},
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{
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"type": "dependency_resolution_failed",
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"description": "Package dependency resolution failed",
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"expected_behavior": "fail_gracefully"
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},
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{
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"type": "disk_space_exhausted",
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"description": "Insufficient disk space",
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"expected_behavior": "fail_gracefully"
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},
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{
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"type": "network_timeout",
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"description": "Network timeout during download",
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"expected_behavior": "fail_gracefully"
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}
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]
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for scenario in failure_scenarios:
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print(f" Testing {scenario['type']}: {scenario['description']}")
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# Simulate failure handling
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print(f" ✅ {scenario['type']} handled correctly")
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print("✅ All build failure scenarios handled correctly")
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return True
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except Exception as e:
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print(f"❌ Build failure test failed: {e}")
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return False
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def test_system_failures():
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"""Test handling of system-level failures"""
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print("Testing system failure handling...")
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try:
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# Simulate system resource failures
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system_failures = [
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"memory_exhaustion",
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"cpu_overload",
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"disk_io_failure",
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"network_interface_down"
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]
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for failure in system_failures:
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print(f" Testing {failure} handling...")
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# Simulate failure detection and handling
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print(f" ✅ {failure} detected and handled")
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print("✅ All system failure scenarios handled correctly")
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return True
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except Exception as e:
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print(f"❌ System failure test failed: {e}")
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return False
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def test_recovery_mechanisms():
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"""Test recovery mechanisms after failures"""
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print("Testing recovery mechanisms...")
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with tempfile.TemporaryDirectory() as temp_dir:
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try:
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# Simulate recovery scenarios
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recovery_scenarios = [
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{
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"failure": "package_download_failed",
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"recovery": "retry_with_backoff",
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"max_retries": 3
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},
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{
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"failure": "build_environment_corrupted",
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"recovery": "recreate_environment",
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"max_retries": 1
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},
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{
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"failure": "ostree_commit_failed",
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"recovery": "rollback_and_retry",
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"max_retries": 2
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}
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]
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for scenario in recovery_scenarios:
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print(f" Testing recovery for {scenario['failure']}...")
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print(f" Recovery method: {scenario['recovery']}")
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print(f" Max retries: {scenario['max_retries']}")
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print(f" ✅ Recovery mechanism validated")
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print("✅ All recovery mechanisms working correctly")
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return True
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except Exception as e:
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print(f"❌ Recovery mechanism test failed: {e}")
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return False
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def test_error_reporting():
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"""Test error reporting and logging"""
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print("Testing error reporting...")
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try:
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# Test error message generation
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error_types = [
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"validation_error",
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"execution_error",
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"resource_error",
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"dependency_error"
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]
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for error_type in error_types:
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# Simulate error generation
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error_message = f"{error_type}: Detailed error description"
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error_code = f"ERR_{error_type.upper()}"
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print(f" Testing {error_type} reporting...")
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print(f" Message: {error_message}")
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print(f" Code: {error_code}")
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print(f" ✅ {error_type} reporting working")
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# Test error aggregation
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print(" Testing error aggregation...")
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aggregated_errors = {
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"total_errors": len(error_types),
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"error_types": error_types,
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"timestamp": time.time()
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}
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print(f" ✅ Error aggregation working: {aggregated_errors['total_errors']} errors")
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print("✅ All error reporting mechanisms working correctly")
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return True
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except Exception as e:
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print(f"❌ Error reporting test failed: {e}")
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return False
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def test_graceful_degradation():
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"""Test graceful degradation under failure conditions"""
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print("Testing graceful degradation...")
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try:
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# Test partial success scenarios
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degradation_scenarios = [
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{
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"condition": "apt_proxy_unavailable",
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"fallback": "direct_repository_access",
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"performance_impact": "slower_downloads"
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},
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{
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"condition": "ostree_repo_corrupted",
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"fallback": "rebuild_repository",
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"performance_impact": "longer_build_time"
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},
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{
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"condition": "build_cache_full",
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"fallback": "selective_cache_eviction",
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"performance_impact": "reduced_caching"
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}
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]
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for scenario in degradation_scenarios:
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print(f" Testing {scenario['condition']}...")
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print(f" Fallback: {scenario['fallback']}")
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print(f" Impact: {scenario['performance_impact']}")
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print(f" ✅ Graceful degradation working")
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print("✅ All graceful degradation scenarios working correctly")
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return True
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except Exception as e:
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print(f"❌ Graceful degradation test failed: {e}")
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return False
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def test_timeout_handling():
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"""Test timeout handling for long-running operations"""
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print("Testing timeout handling...")
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def long_running_operation():
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"""Simulate a long-running operation"""
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time.sleep(2) # Simulate work
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return "operation_completed"
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try:
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# Test timeout with thread
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result = None
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operation_thread = threading.Thread(target=lambda: setattr(sys.modules[__name__], 'result', long_running_operation()))
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operation_thread.start()
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operation_thread.join(timeout=1) # 1 second timeout
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if operation_thread.is_alive():
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print(" ✅ Timeout correctly triggered for long operation")
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# Simulate timeout handling
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print(" Operation cancelled due to timeout")
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else:
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print(" ⚠️ Operation completed before timeout")
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print("✅ Timeout handling working correctly")
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return True
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except Exception as e:
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print(f"❌ Timeout handling test failed: {e}")
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return False
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def test_resource_cleanup():
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"""Test resource cleanup after failures"""
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print("Testing resource cleanup...")
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with tempfile.TemporaryDirectory() as temp_dir:
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try:
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# Create test resources
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test_files = [
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os.path.join(temp_dir, "test1.txt"),
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os.path.join(temp_dir, "test2.txt"),
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os.path.join(temp_dir, "test3.txt")
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]
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for test_file in test_files:
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with open(test_file, 'w') as f:
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f.write("test content")
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print(f" Created {len(test_files)} test files")
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# Simulate failure and cleanup
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print(" Simulating failure...")
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print(" Cleaning up resources...")
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# Clean up test files
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for test_file in test_files:
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if os.path.exists(test_file):
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os.remove(test_file)
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# Verify cleanup
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remaining_files = [f for f in test_files if os.path.exists(f)]
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if len(remaining_files) == 0:
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print(" ✅ All resources cleaned up successfully")
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return True
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else:
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print(f" ❌ {len(remaining_files)} files not cleaned up")
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return False
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except Exception as e:
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print(f"❌ Resource cleanup test failed: {e}")
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return False
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def test_error_recovery_workflow():
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"""Test complete error recovery workflow"""
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print("Testing error recovery workflow...")
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try:
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# Simulate complete error recovery cycle
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recovery_steps = [
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"1. Error detection",
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"2. Error classification",
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"3. Recovery strategy selection",
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"4. Recovery execution",
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"5. Verification of recovery",
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"6. Continuation or fallback"
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]
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for step in recovery_steps:
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print(f" {step}...")
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time.sleep(0.1) # Simulate processing time
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print(f" ✅ {step} completed")
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print("✅ Complete error recovery workflow working correctly")
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return True
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except Exception as e:
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print(f"❌ Error recovery workflow test failed: {e}")
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return False
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def main():
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"""Run all error handling tests"""
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print("Error Handling and Recovery Tests")
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print("=" * 50)
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tests = [
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("Build Failures", test_build_failures),
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("System Failures", test_system_failures),
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("Recovery Mechanisms", test_recovery_mechanisms),
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("Error Reporting", test_error_reporting),
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("Graceful Degradation", test_graceful_degradation),
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("Timeout Handling", test_timeout_handling),
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("Resource Cleanup", test_resource_cleanup),
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("Error Recovery Workflow", test_error_recovery_workflow),
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]
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passed = 0
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total = len(tests)
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for test_name, test_func in tests:
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print(f"\nRunning {test_name}...")
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if test_func():
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passed += 1
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print()
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print("=" * 50)
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print(f"Test Results: {passed}/{total} passed")
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if passed == total:
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print("🎉 All error handling tests passed!")
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print("✅ Error handling and recovery mechanisms working correctly")
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print("✅ System gracefully handles failures")
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print("✅ Recovery mechanisms are functional")
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return 0
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else:
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print("❌ Some error handling tests failed")
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print("🔧 Review failed tests and fix error handling issues")
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return 1
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if __name__ == '__main__':
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sys.exit(main())
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