mongo/jstests/multiVersion/genericBinVersion/query-execution/schema_validation_level.js

/**
 * Test edge cases for the schema validation level 'validated'
 */
import "jstests/multiVersion/libs/multi_rs.js";

import {ReplSetTest} from "jstests/libs/replsettest.js";

const rst = new ReplSetTest({
    nodes: 2,
    nodeOptions: {binVersion: "latest", setParameter: {featureFlagValidatedValidationLevel: true}},
});
rst.startSet();
rst.initiate();

const db = rst.getPrimary().getDB("test");

assert.commandWorked(
    db.createCollection("test", {validator: {a: 1}, validationAction: "error", validationLevel: "validated"}),
);

// Can't downgrade FCV to lastLTS when collection has validated validation level.
assert.commandFailedWithCode(
    rst.getPrimary().adminCommand({setFeatureCompatibilityVersion: lastLTSFCV, confirm: true}),
    ErrorCodes.CannotDowngrade,
);

assert.commandWorked(db.runCommand({collMod: "test", validationLevel: "strict"}));

// After removing validated validation level, we should eventually be able to downgrade
assert.soon(() => {
    assert.commandWorked(rst.getPrimary().adminCommand({setFeatureCompatibilityVersion: lastLTSFCV, confirm: true}));
    return true;
});

rst.stopSet();