// Tests whether a reset sharding version triggers errors
import {ShardingTest} from "jstests/libs/shardingtest.js";

let st = new ShardingTest({shards: 1, mongos: 2});

let mongosA = st.s0;
let mongosB = st.s1;

jsTest.log("Adding new collections...");

let collA = mongosA.getCollection(jsTestName() + ".coll");
assert.commandWorked(collA.insert({hello: "world"}));

let collB = mongosB.getCollection("" + collA);
assert.commandWorked(collB.insert({hello: "world"}));

jsTest.log("Enabling sharding...");

assert.commandWorked(mongosA.getDB("admin").adminCommand({enableSharding: "" + collA.getDB()}));
assert.commandWorked(mongosA.getDB("admin").adminCommand({shardCollection: "" + collA, key: {_id: 1}}));

// MongoD doesn't know about the config shard version *until* MongoS tells it
collA.findOne();

jsTest.log("Trigger shard version mismatch...");

assert.commandWorked(collB.insert({goodbye: "world"}));

print("Inserted...");

assert.eq(3, collA.find().itcount());
assert.eq(3, collB.find().itcount());

st.stop();