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(function() {
// SERVER-28285 When renameCollection drops the target collection, it should just generate
// a single oplog entry, so we cannot end up in a state where the drop has succeeded, but
// the rename didn't.
let rs = new ReplSetTest({nodes: 1});
rs.startSet();
rs.initiate();
let prim = rs.getPrimary();
let first = prim.getDB("first");
let second = prim.getDB("second");
let local = prim.getDB("local");
// Test both for rename within a database as across databases.
const tests = [
{
source: first.x,
target: first.y,
expectedOplogEntries: 1,
},
{
source: first.x,
target: second.x,
expectedOplogEntries: 4,
}
];
tests.forEach((test) => {
test.source.drop();
assert.writeOK(test.source.insert({}));
assert.writeOK(test.target.insert({}));
let ts = local.oplog.rs.find().sort({$natural: -1}).limit(1).next().ts;
let cmd = {
renameCollection: test.source.toString(),
to: test.target.toString(),
dropTarget: true
};
assert.commandWorked(local.adminCommand(cmd), tojson(cmd));
ops = local.oplog.rs.find({ts: {$gt: ts}}).sort({$natural: 1}).toArray();
assert.eq(ops.length,
test.expectedOplogEntries,
"renameCollection was supposed to only generate " + test.expectedOplogEntries +
" oplog entries: " + tojson(ops));
});
})();
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