mongo/jstests/readonly/write_ops.js

import {runReadOnlyTest} from "jstests/readonly/lib/read_only_test.js";

runReadOnlyTest(
    (function () {
        return {
            name: "write_ops",
            load: function (writableCollection) {
                assert.commandWorked(writableCollection.insert({_id: 0, x: 1}));
            },
            exec: function (readableCollection) {
                // Refresh the cluster's collection sharding state in order to have a predictable error
                // returned from the failed writes, otherwhise MultipleErrorsOcurred might be returned
                // if any shard is stale
                readableCollection.count();
                // Test that insert fails.
                assert.writeErrorWithCode(
                    readableCollection.insert({x: 2}),
                    ErrorCodes.IllegalOperation,
                    "Expected insert to fail because database is in read-only mode",
                );

                // Test that delete fails.
                assert.writeErrorWithCode(
                    readableCollection.remove({x: 1}),
                    ErrorCodes.IllegalOperation,
                    "Expected remove to fail because database is in read-only mode",
                );

                // Test that update fails.
                assert.writeErrorWithCode(
                    readableCollection.update({_id: 0}, {$inc: {x: 1}}),
                    ErrorCodes.IllegalOperation,
                    "Expected update to fail because database is in read-only mode",
                );
            },
        };
    })(),
);