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* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { describe, it, expect } from 'vitest';
import {
ModelConfigService,
type ModelConfigAlias,
type ModelConfigServiceConfig,
} from './modelConfigService.js';
describe('ModelConfigService', () => {
it('should resolve a basic alias to its model and settings', () => {
const config: ModelConfigServiceConfig = {
aliases: {
classifier: {
modelConfig: {
model: 'gemini-1.5-flash-latest',
generateContentConfig: {
temperature: 0,
topP: 0.9,
},
},
},
},
overrides: [],
};
const service = new ModelConfigService(config);
const resolved = service.getResolvedConfig({ model: 'classifier' });
expect(resolved.model).toBe('gemini-1.5-flash-latest');
expect(resolved.generateContentConfig).toEqual({
temperature: 0,
topP: 0.9,
});
});
it('should apply a simple override on top of an alias', () => {
const config: ModelConfigServiceConfig = {
aliases: {
classifier: {
modelConfig: {
model: 'gemini-1.5-flash-latest',
generateContentConfig: {
temperature: 0,
topP: 0.9,
},
},
},
},
overrides: [
{
match: { model: 'classifier' },
modelConfig: {
generateContentConfig: {
temperature: 0.5,
maxOutputTokens: 1000,
},
},
},
],
};
const service = new ModelConfigService(config);
const resolved = service.getResolvedConfig({ model: 'classifier' });
expect(resolved.model).toBe('gemini-1.5-flash-latest');
expect(resolved.generateContentConfig).toEqual({
temperature: 0.5,
topP: 0.9,
maxOutputTokens: 1000,
});
});
it('should apply the most specific override rule', () => {
const config: ModelConfigServiceConfig = {
aliases: {},
overrides: [
{
match: { model: 'gemini-pro' },
modelConfig: { generateContentConfig: { temperature: 0.5 } },
},
{
match: { model: 'gemini-pro', overrideScope: 'my-agent' },
modelConfig: { generateContentConfig: { temperature: 0.1 } },
},
],
};
const service = new ModelConfigService(config);
const resolved = service.getResolvedConfig({
model: 'gemini-pro',
overrideScope: 'my-agent',
});
expect(resolved.model).toBe('gemini-pro');
expect(resolved.generateContentConfig).toEqual({ temperature: 0.1 });
});
it('should use the last override in case of a tie in specificity', () => {
const config: ModelConfigServiceConfig = {
aliases: {},
overrides: [
{
match: { model: 'gemini-pro' },
modelConfig: {
generateContentConfig: { temperature: 0.5, topP: 0.8 },
},
},
{
match: { model: 'gemini-pro' },
modelConfig: { generateContentConfig: { temperature: 0.1 } },
},
],
};
const service = new ModelConfigService(config);
const resolved = service.getResolvedConfig({ model: 'gemini-pro' });
expect(resolved.model).toBe('gemini-pro');
expect(resolved.generateContentConfig).toEqual({
temperature: 0.1,
topP: 0.8,
});
});
it('should correctly pass through generation config from an alias', () => {
const config: ModelConfigServiceConfig = {
aliases: {
'thinking-alias': {
modelConfig: {
model: 'gemini-pro',
generateContentConfig: {
candidateCount: 500,
},
},
},
},
overrides: [],
};
const service = new ModelConfigService(config);
const resolved = service.getResolvedConfig({ model: 'thinking-alias' });
expect(resolved.generateContentConfig).toEqual({ candidateCount: 500 });
});
it('should let an override generation config win over an alias config', () => {
const config: ModelConfigServiceConfig = {
aliases: {
'thinking-alias': {
modelConfig: {
model: 'gemini-pro',
generateContentConfig: {
candidateCount: 500,
},
},
},
},
overrides: [
{
match: { model: 'thinking-alias' },
modelConfig: {
generateContentConfig: {
candidateCount: 1000,
},
},
},
],
};
const service = new ModelConfigService(config);
const resolved = service.getResolvedConfig({ model: 'thinking-alias' });
expect(resolved.generateContentConfig).toEqual({
candidateCount: 1000,
});
});
it('should merge settings from global, alias, and multiple matching overrides', () => {
const config: ModelConfigServiceConfig = {
aliases: {
'test-alias': {
modelConfig: {
model: 'gemini-test-model',
generateContentConfig: {
topP: 0.9,
topK: 50,
},
},
},
},
overrides: [
{
match: { model: 'gemini-test-model' },
modelConfig: {
generateContentConfig: {
topK: 40,
maxOutputTokens: 2048,
},
},
},
{
match: { overrideScope: 'test-agent' },
modelConfig: {
generateContentConfig: {
maxOutputTokens: 4096,
},
},
},
{
match: { model: 'gemini-test-model', overrideScope: 'test-agent' },
modelConfig: {
generateContentConfig: {
temperature: 0.2,
},
},
},
],
};
const service = new ModelConfigService(config);
const resolved = service.getResolvedConfig({
model: 'test-alias',
overrideScope: 'test-agent',
});
expect(resolved.model).toBe('gemini-test-model');
expect(resolved.generateContentConfig).toEqual({
// From global, overridden by most specific override
temperature: 0.2,
// From alias, not overridden
topP: 0.9,
// From alias, overridden by less specific override
topK: 40,
// From first matching override, overridden by second matching override
maxOutputTokens: 4096,
});
});
it('should match an agent:core override when agent is undefined', () => {
const config: ModelConfigServiceConfig = {
aliases: {},
overrides: [
{
match: { overrideScope: 'core' },
modelConfig: {
generateContentConfig: {
temperature: 0.1,
},
},
},
],
};
const service = new ModelConfigService(config);
const resolved = service.getResolvedConfig({
model: 'gemini-pro',
overrideScope: undefined, // Explicitly undefined
});
expect(resolved.model).toBe('gemini-pro');
expect(resolved.generateContentConfig).toEqual({
temperature: 0.1,
});
});
describe('alias inheritance', () => {
it('should resolve a simple "extends" chain', () => {
const config: ModelConfigServiceConfig = {
aliases: {
base: {
modelConfig: {
model: 'gemini-1.5-pro-latest',
generateContentConfig: {
temperature: 0.7,
topP: 0.9,
},
},
},
'flash-variant': {
extends: 'base',
modelConfig: {
model: 'gemini-1.5-flash-latest',
},
},
},
};
const service = new ModelConfigService(config);
const resolved = service.getResolvedConfig({ model: 'flash-variant' });
expect(resolved.model).toBe('gemini-1.5-flash-latest');
expect(resolved.generateContentConfig).toEqual({
temperature: 0.7,
topP: 0.9,
});
});
it('should override parent properties from child alias', () => {
const config: ModelConfigServiceConfig = {
aliases: {
base: {
modelConfig: {
model: 'gemini-1.5-pro-latest',
generateContentConfig: {
temperature: 0.7,
topP: 0.9,
},
},
},
'flash-variant': {
extends: 'base',
modelConfig: {
model: 'gemini-1.5-flash-latest',
generateContentConfig: {
temperature: 0.2,
},
},
},
},
};
const service = new ModelConfigService(config);
const resolved = service.getResolvedConfig({ model: 'flash-variant' });
expect(resolved.model).toBe('gemini-1.5-flash-latest');
expect(resolved.generateContentConfig).toEqual({
temperature: 0.2,
topP: 0.9,
});
});
it('should resolve a multi-level "extends" chain', () => {
const config: ModelConfigServiceConfig = {
aliases: {
base: {
modelConfig: {
model: 'gemini-1.5-pro-latest',
generateContentConfig: {
temperature: 0.7,
topP: 0.9,
},
},
},
'base-flash': {
extends: 'base',
modelConfig: {
model: 'gemini-1.5-flash-latest',
},
},
'classifier-flash': {
extends: 'base-flash',
modelConfig: {
generateContentConfig: {
temperature: 0,
},
},
},
},
};
const service = new ModelConfigService(config);
const resolved = service.getResolvedConfig({
model: 'classifier-flash',
});
expect(resolved.model).toBe('gemini-1.5-flash-latest');
expect(resolved.generateContentConfig).toEqual({
temperature: 0,
topP: 0.9,
});
});
it('should throw an error for circular dependencies', () => {
const config: ModelConfigServiceConfig = {
aliases: {
a: { extends: 'b', modelConfig: {} },
b: { extends: 'a', modelConfig: {} },
},
};
const service = new ModelConfigService(config);
expect(() => service.getResolvedConfig({ model: 'a' })).toThrow(
'Circular alias dependency: a -> b -> a',
);
});
describe('abstract aliases', () => {
it('should allow an alias to extend an abstract alias without a model', () => {
const config: ModelConfigServiceConfig = {
aliases: {
'abstract-base': {
modelConfig: {
generateContentConfig: {
temperature: 0.1,
},
},
},
'concrete-child': {
extends: 'abstract-base',
modelConfig: {
model: 'gemini-1.5-pro-latest',
generateContentConfig: {
topP: 0.9,
},
},
},
},
};
const service = new ModelConfigService(config);
const resolved = service.getResolvedConfig({ model: 'concrete-child' });
expect(resolved.model).toBe('gemini-1.5-pro-latest');
expect(resolved.generateContentConfig).toEqual({
temperature: 0.1,
topP: 0.9,
});
});
it('should throw an error if a resolved alias chain has no model', () => {
const config: ModelConfigServiceConfig = {
aliases: {
'abstract-base': {
modelConfig: {
generateContentConfig: { temperature: 0.7 },
},
},
},
};
const service = new ModelConfigService(config);
expect(() =>
service.getResolvedConfig({ model: 'abstract-base' }),
).toThrow(
'Could not resolve a model name for alias "abstract-base". Please ensure the alias chain or a matching override specifies a model.',
);
});
it('should resolve an abstract alias if an override provides the model', () => {
const config: ModelConfigServiceConfig = {
aliases: {
'abstract-base': {
modelConfig: {
generateContentConfig: {
temperature: 0.1,
},
},
},
},
overrides: [
{
match: { model: 'abstract-base' },
modelConfig: {
model: 'gemini-1.5-flash-latest',
},
},
],
};
const service = new ModelConfigService(config);
const resolved = service.getResolvedConfig({ model: 'abstract-base' });
expect(resolved.model).toBe('gemini-1.5-flash-latest');
expect(resolved.generateContentConfig).toEqual({
temperature: 0.1,
});
});
});
it('should throw an error if an extended alias does not exist', () => {
const config: ModelConfigServiceConfig = {
aliases: {
'bad-alias': {
extends: 'non-existent',
modelConfig: {},
},
},
};
const service = new ModelConfigService(config);
expect(() => service.getResolvedConfig({ model: 'bad-alias' })).toThrow(
'Alias "non-existent" not found.',
);
});
it('should throw an error if the alias chain is too deep', () => {
const aliases: Record<string, ModelConfigAlias> = {};
for (let i = 0; i < 101; i++) {
aliases[`alias-${i}`] = {
extends: i === 100 ? undefined : `alias-${i + 1}`,
modelConfig: i === 100 ? { model: 'gemini-pro' } : {},
};
}
const config: ModelConfigServiceConfig = { aliases };
const service = new ModelConfigService(config);
expect(() => service.getResolvedConfig({ model: 'alias-0' })).toThrow(
'Alias inheritance chain exceeded maximum depth of 100.',
);
});
});
describe('deep merging', () => {
it('should deep merge nested config objects from aliases and overrides', () => {
const config: ModelConfigServiceConfig = {
aliases: {
'base-safe': {
modelConfig: {
model: 'gemini-pro',
generateContentConfig: {
safetySettings: {
HARM_CATEGORY_HARASSMENT: 'BLOCK_ONLY_HIGH',
HARM_CATEGORY_HATE_SPEECH: 'BLOCK_ONLY_HIGH',
// eslint-disable-next-line @typescript-eslint/no-explicit-any
} as any,
},
},
},
},
overrides: [
{
match: { model: 'base-safe' },
modelConfig: {
generateContentConfig: {
safetySettings: {
HARM_CATEGORY_HATE_SPEECH: 'BLOCK_NONE',
HARM_CATEGORY_SEXUALLY_EXPLICIT: 'BLOCK_MEDIUM_AND_ABOVE',
// eslint-disable-next-line @typescript-eslint/no-explicit-any
} as any,
},
},
},
],
};
const service = new ModelConfigService(config);
const resolved = service.getResolvedConfig({ model: 'base-safe' });
expect(resolved.model).toBe('gemini-pro');
expect(resolved.generateContentConfig.safetySettings).toEqual({
// From alias
HARM_CATEGORY_HARASSMENT: 'BLOCK_ONLY_HIGH',
// From alias, overridden by override
HARM_CATEGORY_HATE_SPEECH: 'BLOCK_NONE',
// From override
HARM_CATEGORY_SEXUALLY_EXPLICIT: 'BLOCK_MEDIUM_AND_ABOVE',
});
});
it('should not deeply merge merge arrays from aliases and overrides', () => {
const config: ModelConfigServiceConfig = {
aliases: {
base: {
modelConfig: {
model: 'gemini-pro',
generateContentConfig: {
stopSequences: ['foo'],
},
},
},
},
overrides: [
{
match: { model: 'base' },
modelConfig: {
generateContentConfig: {
stopSequences: ['overrideFoo'],
},
},
},
],
};
const service = new ModelConfigService(config);
const resolved = service.getResolvedConfig({ model: 'base' });
expect(resolved.model).toBe('gemini-pro');
expect(resolved.generateContentConfig.stopSequences).toEqual([
'overrideFoo',
]);
});
});
describe('runtime aliases', () => {
it('should resolve a simple runtime-registered alias', () => {
const config: ModelConfigServiceConfig = {
aliases: {},
overrides: [],
};
const service = new ModelConfigService(config);
service.registerRuntimeModelConfig('runtime-alias', {
modelConfig: {
model: 'gemini-runtime-model',
generateContentConfig: {
temperature: 0.123,
},
},
});
const resolved = service.getResolvedConfig({ model: 'runtime-alias' });
expect(resolved.model).toBe('gemini-runtime-model');
expect(resolved.generateContentConfig).toEqual({
temperature: 0.123,
});
});
});
describe('runtime overrides', () => {
it('should resolve a simple runtime-registered override', () => {
const config: ModelConfigServiceConfig = {
aliases: {},
overrides: [],
};
const service = new ModelConfigService(config);
service.registerRuntimeModelOverride({
match: { model: 'gemini-pro' },
modelConfig: {
generateContentConfig: {
temperature: 0.99,
},
},
});
const resolved = service.getResolvedConfig({ model: 'gemini-pro' });
expect(resolved.model).toBe('gemini-pro');
expect(resolved.generateContentConfig.temperature).toBe(0.99);
});
it('should prioritize runtime overrides over default overrides when they have the same specificity', () => {
const config: ModelConfigServiceConfig = {
aliases: {},
overrides: [
{
match: { model: 'gemini-pro' },
modelConfig: { generateContentConfig: { temperature: 0.1 } },
},
],
};
const service = new ModelConfigService(config);
service.registerRuntimeModelOverride({
match: { model: 'gemini-pro' },
modelConfig: { generateContentConfig: { temperature: 0.9 } },
});
const resolved = service.getResolvedConfig({ model: 'gemini-pro' });
// Runtime overrides are appended after overrides/customOverrides, so they should win.
expect(resolved.generateContentConfig.temperature).toBe(0.9);
});
it('should still respect specificity with runtime overrides', () => {
const config: ModelConfigServiceConfig = {
aliases: {},
overrides: [],
};
const service = new ModelConfigService(config);
// Register a more specific runtime override
service.registerRuntimeModelOverride({
match: { model: 'gemini-pro', overrideScope: 'my-agent' },
modelConfig: { generateContentConfig: { temperature: 0.1 } },
});
// Register a less specific runtime override later
service.registerRuntimeModelOverride({
match: { model: 'gemini-pro' },
modelConfig: { generateContentConfig: { temperature: 0.9 } },
});
const resolved = service.getResolvedConfig({
model: 'gemini-pro',
overrideScope: 'my-agent',
});
// Specificity should win over order
expect(resolved.generateContentConfig.temperature).toBe(0.1);
});
it('should clear runtime overrides', () => {
const config: ModelConfigServiceConfig = {
aliases: {},
overrides: [],
};
const service = new ModelConfigService(config);
service.registerRuntimeModelOverride({
match: { model: 'gemini-pro' },
modelConfig: { generateContentConfig: { temperature: 0.99 } },
});
expect(
service.getResolvedConfig({ model: 'gemini-pro' }).generateContentConfig
.temperature,
).toBe(0.99);
service.clearRuntimeOverrides();
expect(
service.getResolvedConfig({ model: 'gemini-pro' }).generateContentConfig
.temperature,
).toBeUndefined();
});
});
describe('custom aliases', () => {
it('should resolve a custom alias', () => {
const config: ModelConfigServiceConfig = {
aliases: {},
customAliases: {
'my-custom-alias': {
modelConfig: {
model: 'gemini-custom',
generateContentConfig: {
temperature: 0.9,
},
},
},
},
overrides: [],
};
const service = new ModelConfigService(config);
const resolved = service.getResolvedConfig({ model: 'my-custom-alias' });
expect(resolved.model).toBe('gemini-custom');
expect(resolved.generateContentConfig).toEqual({
temperature: 0.9,
});
});
it('should allow custom aliases to override built-in aliases', () => {
const config: ModelConfigServiceConfig = {
aliases: {
'standard-alias': {
modelConfig: {
model: 'gemini-standard',
generateContentConfig: {
temperature: 0.5,
},
},
},
},
customAliases: {
'standard-alias': {
modelConfig: {
model: 'gemini-custom-override',
generateContentConfig: {
temperature: 0.1,
},
},
},
},
overrides: [],
};
const service = new ModelConfigService(config);
const resolved = service.getResolvedConfig({ model: 'standard-alias' });
expect(resolved.model).toBe('gemini-custom-override');
expect(resolved.generateContentConfig).toEqual({
temperature: 0.1,
});
});
});
describe('fallback behavior', () => {
it('should fallback to chat-base if the requested model is completely unknown', () => {
const config: ModelConfigServiceConfig = {
aliases: {
'chat-base': {
modelConfig: {
model: 'default-fallback-model',
generateContentConfig: {
temperature: 0.99,
},
},
},
},
};
const service = new ModelConfigService(config);
const resolved = service.getResolvedConfig({
model: 'my-custom-model',
isChatModel: true,
});
// It preserves the requested model name, but inherits the config from chat-base
expect(resolved.model).toBe('my-custom-model');
expect(resolved.generateContentConfig).toEqual({
temperature: 0.99,
});
});
it('should return empty config if requested model is unknown and chat-base is not defined', () => {
const config: ModelConfigServiceConfig = {
aliases: {},
};
const service = new ModelConfigService(config);
const resolved = service.getResolvedConfig({
model: 'my-custom-model',
isChatModel: true,
});
expect(resolved.model).toBe('my-custom-model');
expect(resolved.generateContentConfig).toEqual({});
});
it('should NOT fallback to chat-base if the requested model is completely unknown but isChatModel is false', () => {
const config: ModelConfigServiceConfig = {
aliases: {
'chat-base': {
modelConfig: {
model: 'default-fallback-model',
generateContentConfig: {
temperature: 0.99,
},
},
},
},
};
const service = new ModelConfigService(config);
const resolved = service.getResolvedConfig({
model: 'my-custom-model',
isChatModel: false,
});
expect(resolved.model).toBe('my-custom-model');
expect(resolved.generateContentConfig).toEqual({});
});
});
describe('unrecognized models', () => {
it('should apply overrides to unrecognized model names', () => {
const unregisteredModelName = 'my-unregistered-model-v1';
const config: ModelConfigServiceConfig = {
aliases: {}, // No aliases defined
overrides: [
{
match: { model: unregisteredModelName },
modelConfig: {
generateContentConfig: {
temperature: 0.01,
},
},
},
],
};
const service = new ModelConfigService(config);
// Request the unregistered model directly
const resolved = service.getResolvedConfig({
model: unregisteredModelName,
});
// It should preserve the model name and apply the override
expect(resolved.model).toBe(unregisteredModelName);
expect(resolved.generateContentConfig).toEqual({
temperature: 0.01,
});
});
it('should apply scoped overrides to unrecognized model names', () => {
const unregisteredModelName = 'my-unregistered-model-v1';
const config: ModelConfigServiceConfig = {
aliases: {},
overrides: [
{
match: {
model: unregisteredModelName,
overrideScope: 'special-agent',
},
modelConfig: {
generateContentConfig: {
temperature: 0.99,
},
},
},
],
};
const service = new ModelConfigService(config);
const resolved = service.getResolvedConfig({
model: unregisteredModelName,
overrideScope: 'special-agent',
});
expect(resolved.model).toBe(unregisteredModelName);
expect(resolved.generateContentConfig).toEqual({
temperature: 0.99,
});
});
});
describe('custom overrides', () => {
it('should apply custom overrides on top of defaults', () => {
const config: ModelConfigServiceConfig = {
aliases: {
'test-alias': {
modelConfig: {
model: 'gemini-test',
generateContentConfig: { temperature: 0.5 },
},
},
},
overrides: [
{
match: { model: 'test-alias' },
modelConfig: { generateContentConfig: { temperature: 0.6 } },
},
],
customOverrides: [
{
match: { model: 'test-alias' },
modelConfig: { generateContentConfig: { temperature: 0.7 } },
},
],
};
const service = new ModelConfigService(config);
const resolved = service.getResolvedConfig({ model: 'test-alias' });
// Custom overrides should be appended to overrides, so they win
expect(resolved.generateContentConfig.temperature).toBe(0.7);
});
});
describe('retry behavior', () => {
it('should apply retry-specific overrides when isRetry is true', () => {
const config: ModelConfigServiceConfig = {
aliases: {
'test-model': {
modelConfig: {
model: 'gemini-test',
generateContentConfig: {
temperature: 0.5,
},
},
},
},
overrides: [
{
match: { model: 'test-model', isRetry: true },
modelConfig: {
generateContentConfig: {
temperature: 1.0,
},
},
},
],
};
const service = new ModelConfigService(config);
// Normal request
const normal = service.getResolvedConfig({ model: 'test-model' });
expect(normal.generateContentConfig.temperature).toBe(0.5);
// Retry request
const retry = service.getResolvedConfig({
model: 'test-model',
isRetry: true,
});
expect(retry.generateContentConfig.temperature).toBe(1.0);
});
it('should prioritize retry overrides over generic overrides', () => {
const config: ModelConfigServiceConfig = {
aliases: {
'test-model': {
modelConfig: {
model: 'gemini-test',
generateContentConfig: {
temperature: 0.5,
},
},
},
},
overrides: [
// Generic override for this model
{
match: { model: 'test-model' },
modelConfig: {
generateContentConfig: {
temperature: 0.7,
},
},
},
// Retry-specific override
{
match: { model: 'test-model', isRetry: true },
modelConfig: {
generateContentConfig: {
temperature: 1.0,
},
},
},
],
};
const service = new ModelConfigService(config);
// Normal request - hits generic override
const normal = service.getResolvedConfig({ model: 'test-model' });
expect(normal.generateContentConfig.temperature).toBe(0.7);
// Retry request - hits retry override (more specific)
const retry = service.getResolvedConfig({
model: 'test-model',
isRetry: true,
});
expect(retry.generateContentConfig.temperature).toBe(1.0);
});
it('should apply overrides to parents in the alias hierarchy', () => {
const config: ModelConfigServiceConfig = {
aliases: {
'base-alias': {
modelConfig: {
model: 'gemini-test',
generateContentConfig: {
temperature: 0.5,
},
},
},
'child-alias': {
extends: 'base-alias',
modelConfig: {
generateContentConfig: {
topP: 0.9,
},
},
},
},
overrides: [
{
match: { model: 'base-alias', isRetry: true },
modelConfig: {
generateContentConfig: {
temperature: 1.0,
},
},
},
],
};
const service = new ModelConfigService(config);
// Normal request
const normal = service.getResolvedConfig({ model: 'child-alias' });
expect(normal.generateContentConfig.temperature).toBe(0.5);
// Retry request - should match override on parent
const retry = service.getResolvedConfig({
model: 'child-alias',
isRetry: true,
});
expect(retry.generateContentConfig.temperature).toBe(1.0);
});
});
// Resolves a model ID to a concrete model ID based on the provided context.
describe('resolveModelId', () => {
it('should resolve based on useGemini3_5Flash condition', () => {
const config: ModelConfigServiceConfig = {
modelIdResolutions: {
flash: {
default: 'gemini-2.0-flash',
contexts: [
{
condition: { useGemini3_5Flash: true },
target: 'gemini-3.5-flash',
},
],
},
},
};
const service = new ModelConfigService(config);
expect(service.resolveModelId('flash', { useGemini3_5Flash: true })).toBe(
'gemini-3.5-flash',
);
expect(
service.resolveModelId('flash', { useGemini3_5Flash: false }),
).toBe('gemini-2.0-flash');
expect(service.resolveModelId('flash', {})).toBe('gemini-2.0-flash');
});
it('should resolve based on complex conditions including useGemini3_5Flash', () => {
const config: ModelConfigServiceConfig = {
modelIdResolutions: {
'gemini-flash': {
default: 'gemini-3-flash-preview',
contexts: [
{
condition: {
useGemini3_5Flash: false,
hasAccessToPreview: false,
},
target: 'gemini-2.5-flash',
},
{
condition: { useGemini3_5Flash: true },
target: 'gemini-3.5-flash',
},
],
},
},
};
const service = new ModelConfigService(config);
// Case 1: GA Access granted
expect(
service.resolveModelId('gemini-flash', { useGemini3_5Flash: true }),
).toBe('gemini-3.5-flash');
// Case 2: GA Access denied, but has preview access
expect(
service.resolveModelId('gemini-flash', {
useGemini3_5Flash: false,
hasAccessToPreview: true,
}),
).toBe('gemini-3-flash-preview');
// Case 3: GA Access denied AND no preview access
expect(
service.resolveModelId('gemini-flash', {
useGemini3_5Flash: false,
hasAccessToPreview: false,
}),
).toBe('gemini-2.5-flash');
});
});
describe('getAvailableModelOptions', () => {
it('should filter out Pro models when hasAccessToProModel is false', () => {
const config: ModelConfigServiceConfig = {
modelDefinitions: {
'gemini-3-pro': { isVisible: true, tier: 'pro' },
'gemini-3-flash': { isVisible: true, tier: 'flash' },
},
};
const service = new ModelConfigService(config);
const options = service.getAvailableModelOptions({
hasAccessToProModel: false,
});
expect(options.map((o) => o.modelId)).not.toContain('gemini-3-pro');
expect(options.map((o) => o.modelId)).toContain('gemini-3-flash');
});
it('should include Pro models when hasAccessToProModel is true or undefined', () => {
const config: ModelConfigServiceConfig = {
modelDefinitions: {
'gemini-3-pro': { isVisible: true, tier: 'pro' },
},
};
const service = new ModelConfigService(config);
const optionsWithTrue = service.getAvailableModelOptions({
hasAccessToProModel: true,
});
expect(optionsWithTrue.map((o) => o.modelId)).toContain('gemini-3-pro');
const optionsWithUndefined = service.getAvailableModelOptions({});
expect(optionsWithUndefined.map((o) => o.modelId)).toContain(
'gemini-3-pro',
);
});
});
});
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