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/**
* Test that explained aggregation commands behave correctly with the readConcern option.
* @tags: [requires_majority_read_concern]
*/
(function() {
"use strict";
load("jstests/multiVersion/libs/causal_consistency_helpers.js");
// Skip this test if running with --nojournal and WiredTiger.
if (jsTest.options().noJournal &&
(!jsTest.options().storageEngine || jsTest.options().storageEngine === "wiredTiger")) {
print("Skipping test because running WiredTiger without journaling isn't a valid" +
" replica set configuration");
return;
}
if (!supportsMajorityReadConcern()) {
jsTestLog("Skipping test since storage engine doesn't support majority read concern.");
return;
}
const rst = new ReplSetTest(
{name: "aggExplainReadConcernSet", nodes: 1, nodeOptions: {enableMajorityReadConcern: ""}});
rst.startSet();
rst.initiate();
const primary = rst.getPrimary();
const session = primary.getDB("test").getMongo().startSession({causalConsistency: false});
const sessionDB = session.getDatabase("test");
const coll = sessionDB.agg_explain_read_concern;
// Test that explain is legal with readConcern "local".
assert.commandWorked(coll.explain().aggregate([], {readConcern: {level: "local"}}));
assert.commandWorked(sessionDB.runCommand(
{aggregate: coll.getName(), pipeline: [], explain: true, readConcern: {level: "local"}}));
assert.commandWorked(sessionDB.runCommand({
explain: {aggregate: coll.getName(), pipeline: [], cursor: {}},
readConcern: {level: "local"}
}));
// Test that explain is illegal with other readConcern levels.
const nonLocalReadConcerns = ["majority", "available", "linearizable"];
nonLocalReadConcerns.forEach(function(readConcernLevel) {
let aggCmd = {
aggregate: coll.getName(),
pipeline: [],
explain: true,
readConcern: {level: readConcernLevel}
};
let explainCmd = {
explain: {aggregate: coll.getName(), pipeline: [], cursor: {}},
readConcern: {level: readConcernLevel}
};
assert.throws(() => coll.explain().aggregate([], {readConcern: {level: readConcernLevel}}));
let cmdRes = sessionDB.runCommand(aggCmd);
assert.commandFailedWithCode(cmdRes, ErrorCodes.InvalidOptions, tojson(cmdRes));
let expectedErrStr = "aggregate command cannot run with a readConcern other than 'local'";
assert.neq(cmdRes.errmsg.indexOf(expectedErrStr), -1, tojson(cmdRes));
cmdRes = sessionDB.runCommand(explainCmd);
assert.commandFailedWithCode(cmdRes, ErrorCodes.InvalidOptions, tojson(cmdRes));
expectedErrStr = "Command does not support read concern";
assert.neq(cmdRes.errmsg.indexOf(expectedErrStr), -1, tojson(cmdRes));
});
session.endSession();
rst.stopSet();
}());
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