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* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { describe, it, expect } from 'vitest';
import {
ModelConfigService,
type ModelConfigServiceConfig,
} from './modelConfigService.js';
// This test suite is designed to validate the end-to-end logic of the
// ModelConfigService with a complex, realistic configuration.
// It tests the interplay of global settings, alias inheritance, and overrides
// of varying specificities.
describe('ModelConfigService Integration', () => {
const complexConfig: ModelConfigServiceConfig = {
aliases: {
// Abstract base with no model
base: {
modelConfig: {
generateContentConfig: {
topP: 0.95,
topK: 64,
},
},
},
'default-text-model': {
extends: 'base',
modelConfig: {
model: 'gemini-1.5-pro-latest',
generateContentConfig: {
topK: 40, // Override base
},
},
},
'creative-writer': {
extends: 'default-text-model',
modelConfig: {
generateContentConfig: {
temperature: 0.9, // Override global
topK: 50, // Override parent
},
},
},
'fast-classifier': {
extends: 'base',
modelConfig: {
model: 'gemini-1.5-flash-latest',
generateContentConfig: {
temperature: 0.1,
candidateCount: 4,
},
},
},
},
overrides: [
// Broad override for all flash models
{
match: { model: 'gemini-1.5-flash-latest' },
modelConfig: {
generateContentConfig: {
maxOutputTokens: 2048,
},
},
},
// Specific override for the 'core' agent
{
match: { overrideScope: 'core' },
modelConfig: {
generateContentConfig: {
temperature: 0.5,
stopSequences: ['AGENT_STOP'],
},
},
},
// Highly specific override for the 'fast-classifier' when used by the 'core' agent
{
match: { model: 'fast-classifier', overrideScope: 'core' },
modelConfig: {
generateContentConfig: {
temperature: 0.0,
maxOutputTokens: 4096,
},
},
},
// Override to provide a model for the abstract alias
{
match: { model: 'base', overrideScope: 'core' },
modelConfig: {
model: 'gemini-1.5-pro-latest',
},
},
],
};
const service = new ModelConfigService(complexConfig);
it('should resolve a simple model, applying core agent defaults', () => {
const resolved = service.getResolvedConfig({
model: 'gemini-test-model',
});
expect(resolved.model).toBe('gemini-test-model');
expect(resolved.generateContentConfig).toEqual({
temperature: 0.5, // from agent override
stopSequences: ['AGENT_STOP'], // from agent override
});
});
it('should correctly apply a simple inherited alias and merge with global defaults', () => {
const resolved = service.getResolvedConfig({
model: 'default-text-model',
});
expect(resolved.model).toBe('gemini-1.5-pro-latest'); // from alias
expect(resolved.generateContentConfig).toEqual({
temperature: 0.5, // from agent override
topP: 0.95, // from base
topK: 40, // from alias
stopSequences: ['AGENT_STOP'], // from agent override
});
});
it('should resolve a multi-level inherited alias', () => {
const resolved = service.getResolvedConfig({
model: 'creative-writer',
});
expect(resolved.model).toBe('gemini-1.5-pro-latest'); // from default-text-model
expect(resolved.generateContentConfig).toEqual({
temperature: 0.5, // from agent override
topP: 0.95, // from base
topK: 50, // from alias
stopSequences: ['AGENT_STOP'], // from agent override
});
});
it('should apply an inherited alias and a broad model-based override', () => {
const resolved = service.getResolvedConfig({
model: 'fast-classifier',
// No agent specified, so it should match core agent-specific rules
});
expect(resolved.model).toBe('gemini-1.5-pro-latest'); // now overridden by 'base'
expect(resolved.generateContentConfig).toEqual({
topP: 0.95, // from base
topK: 64, // from base
candidateCount: 4, // from alias
stopSequences: ['AGENT_STOP'], // from agent override
maxOutputTokens: 4096, // from most specific override
temperature: 0.0, // from most specific override
});
});
it('should apply settings for an unknown model but a known agent', () => {
const resolved = service.getResolvedConfig({
model: 'gemini-test-model',
overrideScope: 'core',
});
expect(resolved.model).toBe('gemini-test-model');
expect(resolved.generateContentConfig).toEqual({
temperature: 0.5, // from agent override
stopSequences: ['AGENT_STOP'], // from agent override
});
});
it('should apply the most specific override for a known inherited alias and agent', () => {
const resolved = service.getResolvedConfig({
model: 'fast-classifier',
overrideScope: 'core',
});
expect(resolved.model).toBe('gemini-1.5-pro-latest'); // now overridden by 'base'
expect(resolved.generateContentConfig).toEqual({
// Inherited from 'base'
topP: 0.95,
topK: 64,
// From 'fast-classifier' alias
candidateCount: 4,
// From 'core' agent override
stopSequences: ['AGENT_STOP'],
// From most specific override (model+agent)
temperature: 0.0,
maxOutputTokens: 4096,
});
});
it('should correctly apply agent override on top of a multi-level inherited alias', () => {
const resolved = service.getResolvedConfig({
model: 'creative-writer',
overrideScope: 'core',
});
expect(resolved.model).toBe('gemini-1.5-pro-latest'); // from default-text-model
expect(resolved.generateContentConfig).toEqual({
temperature: 0.5, // from agent override (wins over alias)
topP: 0.95, // from base
topK: 50, // from creative-writer alias
stopSequences: ['AGENT_STOP'], // from agent override
});
});
it('should resolve an abstract alias if a specific override provides the model', () => {
const resolved = service.getResolvedConfig({
model: 'base',
overrideScope: 'core',
});
expect(resolved.model).toBe('gemini-1.5-pro-latest'); // from override
expect(resolved.generateContentConfig).toEqual({
temperature: 0.5, // from agent override
topP: 0.95, // from base alias
topK: 64, // from base alias
stopSequences: ['AGENT_STOP'], // from agent override
});
});
it('should not apply core agent overrides when a different agent is specified', () => {
const resolved = service.getResolvedConfig({
model: 'fast-classifier',
overrideScope: 'non-core-agent',
});
expect(resolved.model).toBe('gemini-1.5-flash-latest');
expect(resolved.generateContentConfig).toEqual({
candidateCount: 4, // from alias
maxOutputTokens: 2048, // from override of model
temperature: 0.1, // from alias
topK: 64, // from base
topP: 0.95, // from base
});
});
it('should correctly merge static aliases, runtime aliases, and overrides', () => {
// Re-instantiate service for this isolated test to not pollute other tests
const service = new ModelConfigService(complexConfig);
// Register a runtime alias, simulating what LocalAgentExecutor does.
// This alias extends a static base and provides its own settings.
service.registerRuntimeModelConfig('agent-runtime:my-agent', {
extends: 'creative-writer', // extends a multi-level alias
modelConfig: {
generateContentConfig: {
temperature: 0.1, // Overrides parent
maxOutputTokens: 8192, // Adds a new property
},
},
});
// Resolve the configuration for the runtime alias, with a matching agent scope
const resolved = service.getResolvedConfig({
model: 'agent-runtime:my-agent',
overrideScope: 'core',
});
// Assert the final merged configuration.
expect(resolved.model).toBe('gemini-1.5-pro-latest'); // from 'default-text-model'
expect(resolved.generateContentConfig).toEqual({
// from 'core' agent override, wins over runtime alias's 0.1 and creative-writer's 0.9
temperature: 0.5,
// from 'base' alias
topP: 0.95,
// from 'creative-writer' alias
topK: 50,
// from runtime alias
maxOutputTokens: 8192,
// from 'core' agent override
stopSequences: ['AGENT_STOP'],
});
});
});
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