File size: 7,723 Bytes
7a1ad33 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 | /**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { describe, expect, it, vi, beforeEach, afterEach } from 'vitest';
import { ModelAvailabilityService } from './modelAvailabilityService.js';
describe('ModelAvailabilityService', () => {
let service: ModelAvailabilityService;
const model = 'test-model';
beforeEach(() => {
service = new ModelAvailabilityService();
vi.useRealTimers();
});
it('returns available snapshot when no state recorded', () => {
expect(service.snapshot(model)).toEqual({ available: true });
});
it('tracks retry-once-per-turn failures', () => {
service.markRetryOncePerTurn(model);
expect(service.snapshot(model)).toEqual({ available: true });
service.consumeStickyAttempt(model);
expect(service.snapshot(model)).toEqual({
available: false,
reason: 'retry_once_per_turn',
});
service.resetTurn();
expect(service.snapshot(model)).toEqual({ available: true });
});
it('tracks retry with custom attempts', () => {
service.markRetryOncePerTurn(model, 3);
const selection = service.selectFirstAvailable([model]);
expect(selection.attempts).toBe(3);
});
it('tracks terminal failures', () => {
service.markTerminal(model, 'quota');
expect(service.snapshot(model)).toEqual({
available: false,
reason: 'quota',
});
});
it('does not override terminal failure with sticky failure', () => {
service.markTerminal(model, 'quota');
service.markRetryOncePerTurn(model);
expect(service.snapshot(model)).toEqual({
available: false,
reason: 'quota',
});
});
it('selects models respecting terminal and sticky states', () => {
const stickyModel = 'stick-model';
const healthyModel = 'healthy-model';
service.markTerminal(model, 'capacity');
service.markRetryOncePerTurn(stickyModel);
const first = service.selectFirstAvailable([
model,
stickyModel,
healthyModel,
]);
expect(first).toEqual({
selectedModel: stickyModel,
attempts: 1,
skipped: [
{
model,
reason: 'capacity',
},
],
});
service.consumeStickyAttempt(stickyModel);
const second = service.selectFirstAvailable([
model,
stickyModel,
healthyModel,
]);
expect(second).toEqual({
selectedModel: healthyModel,
skipped: [
{
model,
reason: 'capacity',
},
{
model: stickyModel,
reason: 'retry_once_per_turn',
},
],
});
service.resetTurn();
const third = service.selectFirstAvailable([
model,
stickyModel,
healthyModel,
]);
expect(third).toEqual({
selectedModel: stickyModel,
attempts: 1,
skipped: [
{
model,
reason: 'capacity',
},
],
});
});
it('preserves consumed state when marking retry-once-per-turn again', () => {
service.markRetryOncePerTurn(model);
service.consumeStickyAttempt(model);
// It is currently consumed
expect(service.snapshot(model).available).toBe(false);
// Marking it again should not reset the consumed flag
service.markRetryOncePerTurn(model);
expect(service.snapshot(model).available).toBe(false);
});
it('clears consumed state when marked healthy', () => {
service.markRetryOncePerTurn(model);
service.consumeStickyAttempt(model);
expect(service.snapshot(model).available).toBe(false);
service.markHealthy(model);
expect(service.snapshot(model).available).toBe(true);
// If we mark it sticky again, it should be fresh (not consumed)
service.markRetryOncePerTurn(model);
expect(service.snapshot(model).available).toBe(true);
});
it('resetTurn resets consumed state for multiple sticky models', () => {
const model2 = 'model-2';
service.markRetryOncePerTurn(model);
service.markRetryOncePerTurn(model2);
service.consumeStickyAttempt(model);
service.consumeStickyAttempt(model2);
expect(service.snapshot(model).available).toBe(false);
expect(service.snapshot(model2).available).toBe(false);
service.resetTurn();
expect(service.snapshot(model).available).toBe(true);
expect(service.snapshot(model2).available).toBe(true);
});
it('resetTurn does not affect terminal models', () => {
service.markTerminal(model, 'quota');
service.resetTurn();
expect(service.snapshot(model)).toEqual({
available: false,
reason: 'quota',
});
});
describe('prefix normalization', () => {
it('treats prefixed and non-prefixed models as identical when marking terminal', () => {
service.markTerminal('models/gemini-3.1-pro-preview', 'quota');
// Checking the non-prefixed version should show it as unavailable
expect(service.snapshot('gemini-3.1-pro-preview')).toEqual({
available: false,
reason: 'quota',
});
// Checking the prefixed version should also show it as unavailable
expect(service.snapshot('models/gemini-3.1-pro-preview')).toEqual({
available: false,
reason: 'quota',
});
});
it('treats prefixed and non-prefixed models as identical when selecting', () => {
service.markTerminal('gemini-3-flash-preview', 'quota');
// Attempting to select the prefixed version should skip it because the base is exhausted
const result = service.selectFirstAvailable([
'models/gemini-3-flash-preview',
'gemini-3.1-pro-preview',
]);
expect(result.selectedModel).toBe('gemini-3.1-pro-preview');
expect(result.skipped).toEqual([
{ model: 'gemini-3-flash-preview', reason: 'quota' },
]);
});
it('treats prefixed and non-prefixed models as identical when marking healthy', () => {
service.markTerminal('gemini-3-flash-preview', 'quota');
service.markHealthy('models/gemini-3-flash-preview');
expect(service.snapshot('gemini-3-flash-preview')).toEqual({
available: true,
});
});
});
describe('Capacity TTL expiration', () => {
beforeEach(() => {
vi.useFakeTimers();
});
afterEach(() => {
vi.useRealTimers();
});
it('recovers terminal status for capacity after the TTL expires', () => {
service.markTerminal(model, 'capacity');
// Before TTL expiration, model is unavailable
expect(service.snapshot(model)).toEqual({
available: false,
reason: 'capacity',
});
// Fast forward 29 seconds (default is 30s)
vi.advanceTimersByTime(29000);
expect(service.snapshot(model)).toEqual({
available: false,
reason: 'capacity',
});
// Fast forward past 30 seconds
vi.advanceTimersByTime(1001);
expect(service.snapshot(model)).toEqual({
available: true,
});
});
it('allows custom TTL parameter in snapshot', () => {
service.markTerminal(model, 'capacity');
// Check with a custom 5s TTL
expect(service.snapshot(model, 5000)).toEqual({
available: false,
reason: 'capacity',
});
// Advance 6 seconds
vi.advanceTimersByTime(6000);
expect(service.snapshot(model, 5000)).toEqual({
available: true,
});
});
it('does not expire terminal status for non-capacity reasons (e.g. quota)', () => {
service.markTerminal(model, 'quota');
// Even after advance, quota remains terminal
vi.advanceTimersByTime(60000);
expect(service.snapshot(model)).toEqual({
available: false,
reason: 'quota',
});
});
});
});
|