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/**
* Tests that the server properly respects the maxBSONDepth parameter, and will fail to start up if
* given an invalid depth.
*/
(function() {
"use strict";
const kTestName = "max_bson_depth_parameter";
// Start mongod with a valid BSON depth, then test that it accepts and rejects command
// appropriately based on the depth.
let conn = MongoRunner.runMongod({setParameter: "maxBSONDepth=5"});
assert.neq(null, conn, "Failed to start mongod");
let testDB = conn.getDB("test");
assert.commandWorked(testDB.runCommand({ping: 1}), "Failed to run a command on the server");
assert.commandFailedWithCode(
testDB.runCommand({find: "coll", filter: {x: {x: {x: {x: {x: {x: 1}}}}}}}),
ErrorCodes.Overflow,
"Expected server to reject command for exceeding the nesting depth limit");
// Confirm depth limits for $lookup.
assert.commandWorked(testDB.coll1.insert({_id: 1}));
assert.commandWorked(testDB.coll2.insert({_id: 1}));
assert.commandWorked(testDB.runCommand({
aggregate: "coll1",
pipeline: [{$lookup: {from: "coll2", as: "as", pipeline: []}}],
cursor: {}
}));
assert.commandFailedWithCode(
testDB.runCommand({
aggregate: "coll1",
pipeline: [{
$lookup: {
from: "coll2",
as: "as",
pipeline: [{$lookup: {from: "coll2", as: "as", pipeline: []}}]
}
}],
cursor: {}
}),
ErrorCodes.Overflow,
"Expected server to reject command for exceeding the nesting depth limit");
// Restart mongod with a negative maximum BSON depth and test that it fails to start.
MongoRunner.stopMongod(conn);
conn = MongoRunner.runMongod({setParameter: "maxBSONDepth=-4"});
assert.eq(null, conn, "Expected mongod to fail at startup because depth was negative");
conn = MongoRunner.runMongod({setParameter: "maxBSONDepth=1"});
assert.eq(null, conn, "Expected mongod to fail at startup because depth was too low");
}());
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