jstests/core/long_index_rename.js


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// SERVER-7720 Building an index with a too-long name is acceptable since 4.2.
// Previously, we would disallow index creation with with too long a name.
// @tags: [requires_non_retryable_commands, assumes_unsharded_collection]

(function() {
    'use strict';

    const coll = db.long_index_rename;
    coll.drop();

    for (let i = 1; i < 10; i++) {
        coll.save({a: i});
    }

    // Beginning with 4.2, index namespaces longer than 127 characters are acceptable.
    assert.commandWorked(coll.createIndex({b: 1}, {name: 'a'.repeat(8192)}));

    // Before 4.2, index namespace lengths were checked while renaming collections.
    const dest = db.long_index_rename2;
    dest.drop();
    assert.commandWorked(coll.renameCollection(dest.getName()));
})();