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/* Test that both transaction and non-transaction snapshot reads on capped collections are not
* allowed.
*
* @tags: [
* requires_majority_read_concern,
* requires_persistence,
* requires_replication,
* ]
*/
(function() {
"use strict";
const replSet = new ReplSetTest({nodes: 1});
replSet.startSet();
replSet.initiate();
const collName = "coll";
const primary = replSet.getPrimary();
const primaryDB = primary.getDB('test');
assert.commandWorked(primaryDB.createCollection(collName, {capped: true, size: 32, max: 1}));
// Non-transaction snapshot reads on capped collections are not allowed.
assert.commandFailedWithCode(
primaryDB.runCommand({find: collName, readConcern: {level: "snapshot"}}),
ErrorCodes.SnapshotUnavailable);
assert.commandFailedWithCode(
primaryDB.runCommand(
{aggregate: collName, pipeline: [], cursor: {}, readConcern: {level: "snapshot"}}),
ErrorCodes.SnapshotUnavailable);
assert.commandFailedWithCode(
primaryDB.runCommand({distinct: collName, key: "_id", readConcern: {level: "snapshot"}}),
ErrorCodes.SnapshotUnavailable);
// After starting a transaction with read concern snapshot, the following find command should fail.
// This is because transaction snapshot reads are banned on capped collections.
const session = primary.startSession({causalConsistency: false});
const sessionDB = session.getDatabase('test');
session.startTransaction({readConcern: {level: 'snapshot'}});
assert.commandFailedWithCode(sessionDB.runCommand({find: collName}),
ErrorCodes.SnapshotUnavailable);
replSet.stopSet();
})();
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