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/**
* 1. Tests that if the donor and recipient shards are in fcv=3.4, the recipient shard accepts the
* chunk even though the donor does not return a UUID as part of listCollections.
*
* 2. Tests that a recipient shard in fcv=3.6 expects listCollections against the donor shard
* primary to return a UUID, and fails if it does not (i.e., the donor shard primary has fcv < 3.6).
*
* 3. Tests that if the donor and recipient shards are in fcv=3.6, the recipient shard uses the UUID
* obtained from the donor shard when creating the collection on itself.
*/
(function() {
load('jstests/libs/uuid_util.js');
let db = "test";
let coll = "foo";
let nss = db + "." + coll;
let st = new ShardingTest({shards: {rs0: {nodes: 1}, rs1: {nodes: 1}}, other: {config: 3}});
let donor = st.shard0;
let recipient = st.shard1;
let setUp = function() {
assert.commandWorked(st.s.adminCommand({enableSharding: db}));
st.ensurePrimaryShard(db, donor.shardName);
assert.commandWorked(st.s.adminCommand({shardCollection: nss, key: {_id: 1}}));
};
// 1. Check that if both the donor and recipient are in fcv=3.4, the recipient accepts the
// chunk even though the donor does not return a UUID.
assert.commandWorked(st.s.adminCommand({setFeatureCompatibilityVersion: "3.4"}));
setUp();
assert.commandWorked(
st.s.adminCommand({moveChunk: nss, find: {_id: 0}, to: recipient.shardName}));
assert.commandWorked(st.s.getDB(db).runCommand({dropDatabase: 1}));
// 2. Check that if the donor is in fcv=3.4, but the recipient is in fcv=3.6, the recipient
// fails to accept the chunk.
assert.commandWorked(recipient.adminCommand({setFeatureCompatibilityVersion: "3.6"}));
setUp();
assert.commandFailed(
st.s.adminCommand({moveChunk: nss, find: {_id: 0}, to: recipient.shardName}));
// Sanity check that the recipient shard did not create the collection on itself.
let listCollsRes = recipient.getDB(db).runCommand({listCollections: 1, filter: {name: coll}});
assert.commandWorked(listCollsRes);
assert.neq(undefined, listCollsRes.cursor);
assert.neq(undefined, listCollsRes.cursor.firstBatch);
assert.eq(0, listCollsRes.cursor.firstBatch.length);
assert.commandWorked(st.s.getDB(db).runCommand({dropDatabase: 1}));
// 3. Check that if both the donor and recipient are in fcv=3.6, the recipient accepts the chunk
// and uses the UUID from the recipient when creating the collection.
assert.commandWorked(st.s.adminCommand({setFeatureCompatibilityVersion: "3.6"}));
setUp();
assert.commandWorked(
st.s.adminCommand({moveChunk: nss, find: {_id: 0}, to: recipient.shardName}));
let donorUUID = getUUIDFromListCollections(donor.getDB(db), coll);
assert.neq(undefined, donorUUID);
let recipientUUID = getUUIDFromListCollections(recipient.getDB(db), coll);
assert.neq(undefined, recipientUUID);
assert.eq(donorUUID, recipientUUID);
// Sanity check that the UUID in config.collections matches the donor's and recipient's UUIDs.
let collEntryUUID = getUUIDFromConfigCollections(st.s, nss);
assert.neq(undefined, collEntryUUID);
assert.eq(donorUUID, collEntryUUID);
})();
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