// Test for SERVER-7017
// We are allowed to rename a collection when one of its indexes will generate a namespace
// that is greater than 120 chars. To do this we create a long index name and try
// and rename the collection to one with a much longer name. We use the test database
// by default and we add this here to ensure we are using it
// @tags: [
//   assumes_no_implicit_collection_creation_after_drop,
//   requires_non_retryable_commands,
// ]

(function() {
'use strict';

const testDB = db.getSiblingDB("test");
const srcName = "renameSRC";
const src = testDB.getCollection(srcName);
const dstName = "dest4567890123456789012345678901234567890123456789012345678901234567890";
const dst = testDB.getCollection(dstName);

src.drop();
dst.drop();

src.createIndex({
    "name": 1,
    "date": 1,
    "time": 1,
    "renameCollection": 1,
    "mongodb": 1,
    "testing": 1,
    "data": 1
});

// Newly created index + _id index in original collection (+ hashed _id in case of sharded suite)
const originalNumberOfIndexes = src.getIndexes().length;

// Should succeed in renaming collection as the long index namespace is acceptable.
assert.commandWorked(src.renameCollection(dstName), "Rename collection with long name failed");

assert.eq(0, src.getIndexes().length, "No indexes expected on already renamed collection");
assert.eq(originalNumberOfIndexes,
          dst.getIndexes().length,
          "Expected exactly same number of indexes of source collection before rename");
})();