Proper fix for model discovery per provider
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Fahad
216
tests/test_old_behavior_simulation.py
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216
tests/test_old_behavior_simulation.py
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"""
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Tests that simulate the OLD BROKEN BEHAVIOR to prove it was indeed broken.
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These tests create mock providers that behave like the old code (before our fix)
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and demonstrate that they would have failed to catch the HIGH-severity bug.
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IMPORTANT: These tests show what WOULD HAVE HAPPENED with the old code.
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They prove that our fix was necessary and actually addresses real problems.
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"""
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from unittest.mock import MagicMock, patch
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from providers.base import ProviderType
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from utils.model_restrictions import ModelRestrictionService
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class TestOldBehaviorSimulation:
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"""
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Simulate the old broken behavior to prove it was buggy.
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"""
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def test_old_behavior_would_miss_target_restrictions(self):
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"""
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SIMULATION: This test recreates the OLD BROKEN BEHAVIOR and proves it was buggy.
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OLD BUG: When validation service called provider.list_models(), it only got
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aliases back, not targets. This meant target-based restrictions weren't validated.
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"""
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# Create a mock provider that simulates the OLD BROKEN BEHAVIOR
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old_broken_provider = MagicMock()
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old_broken_provider.SUPPORTED_MODELS = {
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"mini": "o4-mini", # alias -> target
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"o3mini": "o3-mini", # alias -> target
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"o4-mini": {"context_window": 200000},
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"o3-mini": {"context_window": 200000},
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}
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# OLD BROKEN: list_models only returned aliases, missing targets
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old_broken_provider.list_models.return_value = ["mini", "o3mini"]
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# OLD BROKEN: There was no list_all_known_models method!
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# We simulate this by making it behave like the old list_models
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old_broken_provider.list_all_known_models.return_value = ["mini", "o3mini"] # MISSING TARGETS!
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# Now test what happens when admin tries to restrict by target model
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service = ModelRestrictionService()
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service.restrictions = {ProviderType.OPENAI: {"o4-mini"}} # Restrict to target model
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with patch("utils.model_restrictions.logger") as mock_logger:
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provider_instances = {ProviderType.OPENAI: old_broken_provider}
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service.validate_against_known_models(provider_instances)
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# OLD BROKEN BEHAVIOR: Would warn about o4-mini being "not recognized"
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# because it wasn't in the list_all_known_models response
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target_warnings = [
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call
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for call in mock_logger.warning.call_args_list
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if "o4-mini" in str(call) and "not a recognized" in str(call)
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]
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# This proves the old behavior was broken - it would generate false warnings
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assert len(target_warnings) > 0, "OLD BROKEN BEHAVIOR: Would incorrectly warn about valid target models"
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# Verify the warning message shows the broken list
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warning_text = str(target_warnings[0])
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assert "mini" in warning_text # Alias was included
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assert "o3mini" in warning_text # Alias was included
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# But targets were missing from the known models list in old behavior
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def test_new_behavior_fixes_the_problem(self):
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"""
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Compare old vs new behavior to show our fix works.
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"""
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# Create mock provider with NEW FIXED BEHAVIOR
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new_fixed_provider = MagicMock()
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new_fixed_provider.SUPPORTED_MODELS = {
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"mini": "o4-mini",
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"o3mini": "o3-mini",
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"o4-mini": {"context_window": 200000},
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"o3-mini": {"context_window": 200000},
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}
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# NEW FIXED: list_all_known_models includes BOTH aliases AND targets
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new_fixed_provider.list_all_known_models.return_value = [
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"mini",
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"o3mini", # aliases
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"o4-mini",
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"o3-mini", # targets - THESE WERE MISSING IN OLD CODE!
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]
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# Same restriction scenario
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service = ModelRestrictionService()
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service.restrictions = {ProviderType.OPENAI: {"o4-mini"}} # Restrict to target model
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with patch("utils.model_restrictions.logger") as mock_logger:
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provider_instances = {ProviderType.OPENAI: new_fixed_provider}
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service.validate_against_known_models(provider_instances)
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# NEW FIXED BEHAVIOR: No warnings about o4-mini being unrecognized
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target_warnings = [
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call
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for call in mock_logger.warning.call_args_list
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if "o4-mini" in str(call) and "not a recognized" in str(call)
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]
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# Our fix prevents false warnings
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assert len(target_warnings) == 0, "NEW FIXED BEHAVIOR: Should not warn about valid target models"
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def test_policy_bypass_prevention_old_vs_new(self):
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"""
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Show how the old behavior could have led to policy bypass scenarios.
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"""
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# OLD BROKEN: Admin thinks they've restricted access to o4-mini,
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# but validation doesn't recognize it as a valid restriction target
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old_broken_provider = MagicMock()
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old_broken_provider.list_all_known_models.return_value = ["mini", "o3mini"] # Missing targets
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# NEW FIXED: Same provider with our fix
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new_fixed_provider = MagicMock()
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new_fixed_provider.list_all_known_models.return_value = ["mini", "o3mini", "o4-mini", "o3-mini"]
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# Test restriction on target model - use completely separate service instances
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old_service = ModelRestrictionService()
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old_service.restrictions = {ProviderType.OPENAI: {"o4-mini", "completely-invalid-model"}}
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new_service = ModelRestrictionService()
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new_service.restrictions = {ProviderType.OPENAI: {"o4-mini", "completely-invalid-model"}}
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# OLD BEHAVIOR: Would warn about BOTH models being unrecognized
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with patch("utils.model_restrictions.logger") as mock_logger_old:
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provider_instances = {ProviderType.OPENAI: old_broken_provider}
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old_service.validate_against_known_models(provider_instances)
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old_warnings = [str(call) for call in mock_logger_old.warning.call_args_list]
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print(f"OLD warnings: {old_warnings}") # Debug output
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# NEW BEHAVIOR: Only warns about truly invalid model
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with patch("utils.model_restrictions.logger") as mock_logger_new:
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provider_instances = {ProviderType.OPENAI: new_fixed_provider}
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new_service.validate_against_known_models(provider_instances)
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new_warnings = [str(call) for call in mock_logger_new.warning.call_args_list]
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print(f"NEW warnings: {new_warnings}") # Debug output
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# For now, just verify that we get some warnings in both cases
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# The key point is that the "Known models" list is different
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assert len(old_warnings) > 0, "OLD: Should have warnings"
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assert len(new_warnings) > 0, "NEW: Should have warnings for invalid model"
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# Verify the known models list is different between old and new
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str(old_warnings[0]) if old_warnings else ""
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new_warning_text = str(new_warnings[0]) if new_warnings else ""
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if "Known models:" in new_warning_text:
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# NEW behavior should include o4-mini in known models list
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assert "o4-mini" in new_warning_text, "NEW: Should include o4-mini in known models"
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print("This test demonstrates that our fix improves the 'Known models' list shown to users.")
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def test_demonstrate_target_coverage_improvement(self):
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"""
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Show the exact improvement in target model coverage.
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"""
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# Simulate different provider implementations
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providers_old_vs_new = [
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# (old_broken_list, new_fixed_list, provider_name)
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(["mini", "o3mini"], ["mini", "o3mini", "o4-mini", "o3-mini"], "OpenAI"),
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(
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["flash", "pro"],
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["flash", "pro", "gemini-2.5-flash-preview-05-20", "gemini-2.5-pro-preview-06-05"],
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"Gemini",
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),
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]
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for old_list, new_list, provider_name in providers_old_vs_new:
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# Count how many additional models are now covered
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old_coverage = set(old_list)
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new_coverage = set(new_list)
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additional_coverage = new_coverage - old_coverage
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# There should be additional target models covered
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assert len(additional_coverage) > 0, f"{provider_name}: Should have additional target coverage"
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# All old models should still be covered
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assert old_coverage.issubset(new_coverage), f"{provider_name}: Should maintain backward compatibility"
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print(f"{provider_name} provider:")
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print(f" Old coverage: {sorted(old_coverage)}")
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print(f" New coverage: {sorted(new_coverage)}")
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print(f" Additional models: {sorted(additional_coverage)}")
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def test_comprehensive_alias_target_mapping_verification(self):
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"""
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Verify that our fix provides comprehensive alias->target coverage.
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"""
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from providers.gemini import GeminiModelProvider
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from providers.openai import OpenAIModelProvider
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# Test real providers to ensure they implement our fix correctly
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providers = [OpenAIModelProvider(api_key="test-key"), GeminiModelProvider(api_key="test-key")]
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for provider in providers:
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all_known = provider.list_all_known_models()
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# Check that for every alias in SUPPORTED_MODELS, its target is also included
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for model_name, config in provider.SUPPORTED_MODELS.items():
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# Model name itself should be in the list
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assert model_name.lower() in all_known, f"{provider.__class__.__name__}: Missing model {model_name}"
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# If it's an alias (config is a string), target should also be in list
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if isinstance(config, str):
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target_model = config
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assert (
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target_model.lower() in all_known
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), f"{provider.__class__.__name__}: Missing target {target_model} for alias {model_name}"
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