]);

});

it("counts tracked extension tests without walking extension directories", () => {

const output = execFileSync(

process.execPath,

[

"--input-type=module",

"--eval",

`

import fs from "node:fs";

import { syncBuiltinESMExports } from "node:module";

const counts = { readdirSync: 0 };

const originalReaddirSync = fs.readdirSync;

fs.readdirSync = (...args) => {

counts.readdirSync += 1;

return originalReaddirSync(...args);

};

syncBuiltinESMExports();

const { createExtensionTestShards, resolveExtensionBatchPlan } = await import("./scripts/lib/extension-test-plan.mjs");

const extensionIds = ["matrix", "openai", "slack", "telegram"];

const batch = resolveExtensionBatchPlan({ cwd: process.cwd(), extensionIds });

const shards = createExtensionTestShards({ cwd: process.cwd(), extensionIds, shardCount: 2 });

console.log(JSON.stringify({

batchTests: batch.testFileCount,

counts,

shards: shards.length,

shardTests: shards.reduce((total, shard) => total + shard.testFileCount, 0),

}));

`,

],

{

cwd: process.cwd(),

encoding: "utf8",

},

);

const payload = JSON.parse(output) as {

batchTests: number;

counts: { readdirSync: number };

shards: number;

shardTests: number;

};

expect(payload.batchTests).toBeGreaterThan(0);

expect(payload.shards).toBe(2);

expect(payload.shardTests).toBe(payload.batchTests);

expect(payload.counts.readdirSync).toBe(0);

});

it("balances extension test shards by estimated CI cost", () => {

const shards = createExtensionTestShards({

cwd: process.cwd(),