// @tags: [requires_non_retryable_commands, requires_fastcount]

a = db.rename2a;
b = db.rename2b;

a.drop();
b.drop();

a.save({x: 1});
a.save({x: 2});
a.save({x: 3});

assert.eq(3, a.count(), "A");
assert.eq(0, b.count(), "B");

assert(a.renameCollection("rename2b"), "the command");

assert.eq(0, a.count(), "C");
assert.eq(3, b.count(), "D");