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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { it } from 'vitest';
import fs from 'node:fs';
import path from 'node:path';
import crypto from 'node:crypto';
import { execSync } from 'node:child_process';
import { TestRig } from '@google/gemini-cli-test-utils';
import {
createUnauthorizedToolError,
parseAgentMarkdown,
} from '@google/gemini-cli-core';
export * from '@google/gemini-cli-test-utils';
// Indicates the consistency expectation for this test.
// - ALWAYS_PASSES - Means that the test is expected to pass 100% of the time. These
// These tests are typically trivial and test basic functionality with unambiguous
// prompts. For example: "call save_memory to remember foo" should be fairly reliable.
// These are the first line of defense against regressions in key behaviors and run in
// every CI. You can run these locally with 'npm run test:always_passing_evals'.
//
// - USUALLY_PASSES - Means that the test is expected to pass most of the time but
// may have some flakiness as a result of relying on non-deterministic prompted
// behaviors and/or ambiguous prompts or complex tasks.
// For example: "Please do build changes until the very end" --> ambiguous whether
// the agent should add to memory without more explicit system prompt or user
// instructions. There are many more of these tests and they may pass less consistently.
// The pass/fail trendline of this set of tests can be used as a general measure
// of product quality. You can run these locally with 'npm run test:all_evals'.
// This may take a really long time and is not recommended.
export type EvalPolicy = 'ALWAYS_PASSES' | 'USUALLY_PASSES';
export function evalTest(policy: EvalPolicy, evalCase: EvalCase) {
const fn = asyn
D6D4
c () => {
const rig = new TestRig();
const { logDir, sanitizedName } = await prepareLogDir(evalCase.name);
const activityLogFile = path.join(logDir, `${sanitizedName}.jsonl`);
const logFile = path.join(logDir, `${sanitizedName}.log`);
let isSuccess = false;
try {
rig.setup(evalCase.name, evalCase.params);
// Symlink node modules to reduce the amount of time needed to
// bootstrap test projects.
symlinkNodeModules(rig.testDir || '');
if (evalCase.files) {
const acknowledgedAgents: Record<string, Record<string, string>> = {};
const projectRoot = fs.realpathSync(rig.testDir!);
for (const [filePath, content] of Object.entries(evalCase.files)) {
const fullPath = path.join(rig.testDir!, filePath);
fs.mkdirSync(path.dirname(fullPath), { recursive: true });
fs.writeFileSync(fullPath, content);
// If it's an agent file, calculate hash for acknowledgement
if (
filePath.startsWith('.gemini/agents/') &&
filePath.endsWith('.md')
) {
const hash = crypto
.createHash('sha256')
.update(content)
.digest('hex');
try {
const agentDefs = await parseAgentMarkdown(fullPath, content);
if (agentDefs.length > 0) {
const agentName = agentDefs[0].name;
if (!acknowledgedAgents[projectRoot]) {
acknowledgedAgents[projectRoot] = {};
}
acknowledgedAgents[projectRoot][agentName] = hash;
}
} catch (error) {
console.warn(
`Failed to parse agent for test acknowledgement: ${filePath}`,
error,
);
}
}
}
// Write acknowledged_agents.json to the home directory
if (Object.keys(acknowledgedAgents).length > 0) {
const ackPath = path.join(
rig.homeDir!,
'.gemini',
'acknowledgments',
'agents.json',
);
fs.mkdirSync(path.dirname(ackPath), { recursive: true });
fs.writeFileSync(
ackPath,
JSON.stringify(acknowledgedAgents, null, 2),
);
}
const execOptions = { cwd: rig.testDir!, stdio: 'inherit' as const };
execSync('git init', execOptions);
execSync('git config user.email "test@example.com"', execOptions);
execSync('git config user.name "Test User"', execOptions);
// Temporarily disable the interactive editor and git pager
// to avoid hanging the tests. It seems the the agent isn't
// consistently honoring the instructions to avoid interactive
// commands.
execSync('git config core.editor "true"', execOptions);
execSync('git config core.pager "cat"', execOptions);
execSync('git add .', execOptions);
execSync('git commit --allow-empty -m "Initial commit"', execOptions);
}
const result = await rig.run({
args: evalCase.prompt,
approvalMode: evalCase.approvalMode ?? 'yolo',
timeout: evalCase.timeout,
env: {
GEMINI_CLI_ACTIVITY_LOG_TARGET: activityLogFile,
},
});
const unauthorizedErrorPrefix =
createUnauthorizedToolError('').split("'")[0];
if (result.includes(unauthorizedErrorPrefix)) {
throw new Error(
'Test failed due to unauthorized tool call in output: ' + result,
);
}
await evalCase.assert(rig, result);
isSuccess = true;
} finally {
if (isSuccess) {
await fs.promises.unlink(activityLogFile).catch((err) => {
if (err.code !== 'ENOENT') throw err;
});
}
if (rig._lastRunStderr) {
const stderrFile = path.join(logDir, `${sanitizedName}.stderr.log`);
await fs.promises.writeFile(stderrFile, rig._lastRunStderr);
}
await fs.promises.writeFile(
logFile,
JSON.stringify(rig.readToolLogs(), null, 2),
);
await rig.cleanup();
}
};
runEval(policy, evalCase.name, fn, evalCase.timeout);
}
/**
* Wraps a test function with the appropriate Vitest 'it' or 'it.skip' based on policy.
*/
export function runEval(
policy: EvalPolicy,
name: string,
fn: () => Promise<void>,
timeout?: number,
) {
if (policy === 'USUALLY_PASSES' && !process.env['RUN_EVALS']) {
it.skip(name, fn);
} else {
it(name, fn, timeout);
}
}
export async function prepareLogDir(name: string) {
const logDir = path.resolve(process.cwd(), 'evals/logs');
await fs.promises.mkdir(logDir, { recursive: true });
const sanitizedName = name.replace(/[^a-z0-9]/gi, '_').toLowerCase();
return { logDir, sanitizedName };
}
/**
* Symlinks node_modules to the test directory to speed up tests that need to run tools.
*/
export function symlinkNodeModules(testDir: string) {
const rootNodeModules = path.join(process.cwd(), 'node_modules');
const testNodeModules = path.join(testDir, 'node_modules');
if (
testDir &&
fs.existsSync(rootNodeModules) &&
!fs.existsSync(testNodeModules)
) {
fs.symlinkSync(rootNodeModules, testNodeModules, 'dir');
}
}
export interface EvalCase {
name: string;
params?: Record<string, any>;
prompt: string;
timeout?: number;
files?: Record<string, string>;
approvalMode?: 'default' | 'auto_edit' | 'yolo' | 'plan';
assert: (rig: TestRig, result: string) => Promise<void>;
}