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/**
* Test to verify that the schema validator works correctly in a multi-threaded environment, when
* $expr uses expressions which mutate variable values while executing ($let, $map etc).
* @tags: [requires_non_retryable_writes]
*/
"use strict";
var $config = (function() {
function setup(db, collName) {
for (let i = 0; i < 200; ++i) {
assertAlways.commandWorked(
db[collName].insert({_id: i, a: i, one: 1, counter: 0, array: [0, i]}));
}
// Add a validator which checks that field 'a' has value 5 and sum of the elements in field
// 'array' is 5. The expression is purposefully complex so that it can create a stress on
// expressions with variables.
assertAlways.commandWorked(db.runCommand({
collMod: collName,
validator: {
$expr: {
$and: [
{
$eq: [
5,
{
$let: {
vars: {item: {$multiply: ["$a", "$one"]}},
in : {$multiply: ["$$item", "$one"]}
}
}
]
},
{
$eq: [
5,
{
$sum: {
$map:
{"input": "$array", "as": "item", "in": "$$item"}
}
}
]
}
]
}
}
}));
}
const states = {
applyValidator: function(db, collName) {
assertAlways.commandWorked(db[collName].update({_id: 5}, {$inc: {counter: 1}}));
assertAlways.commandFailedWithCode(
db[collName].update({_id: 4}, {$set: {a: 4}, $inc: {counter: 1}}),
ErrorCodes.DocumentValidationFailure);
// Update all the documents in the collection.
assertAlways.commandWorked(db[collName].update(
{}, {$set: {a: 5, array: [2, 3]}, $inc: {counter: 1}}, {multi: true}));
// Validation fails when elements of 'array' doesn't add up to 5.
assertAlways.commandFailedWithCode(
db[collName].update({_id: 4}, {$set: {a: 5, array: [2, 2]}}),
ErrorCodes.DocumentValidationFailure);
}
};
let transitions = {applyValidator: {applyValidator: 1}};
return {
threadCount: 50,
iterations: 100,
states: states,
startState: "applyValidator",
transitions: transitions,
setup: setup
};
})();
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