mongo/jstests/replsets/commands_that_write_accept_wc.js

/**
 * This file tests that commands that do writes accept a write concern. This file does not test
 * mongos commands or user management commands, both of which are tested separately. This test
 * defines various database commands and what they expect to be true before and after the fact.
 * It then runs the commands with an invalid writeConcern and a valid writeConcern and
 * ensures that they succeed and fail appropriately.
 */

(function() {
"use strict";
var replTest = new ReplSetTest({
    name: 'WCSet',
    // Set priority of secondaries to zero to prevent spurious elections.
    nodes: [{}, {rsConfig: {priority: 0}}, {rsConfig: {priority: 0}}],
    settings: {chainingAllowed: false}
});
replTest.startSet();
replTest.initiate();

var primary = replTest.getPrimary();
var dbName = "wc-test";
var db = primary.getDB(dbName);
var collName = 'leaves';
var coll = db[collName];

function dropTestCollection() {
    replTest.awaitReplication();
    coll.drop();
    assert.eq(0, coll.find().itcount(), "test collection not empty");
}

dropTestCollection();

var commands = [];

commands.push({
    req: {insert: collName, documents: [{type: 'maple'}]},
    setupFunc: function() {},
    confirmFunc: function() {
        assert.eq(coll.count({type: 'maple'}), 1);
    }
});

commands.push({
    req: {createIndexes: collName, indexes: [{key: {'type': 1}, name: 'type_index'}]},
    setupFunc: function() {
        coll.insert({type: 'oak'});
        assert.eq(coll.getIndexes().length, 1);
    },
    confirmFunc: function() {
        assert.eq(coll.getIndexes().length, 2);
    }
});

commands.push({
    req: {
        update: collName,
        updates: [{
            q: {type: 'oak'},
            u: [{$set: {type: 'ginkgo'}}],
        }],
        writeConcern: {w: 'majority'}
    },
    setupFunc: function() {
        coll.insert({type: 'oak'});
        assert.eq(coll.count({type: 'ginkgo'}), 0);
        assert.eq(coll.count({type: 'oak'}), 1);
    },
    confirmFunc: function() {
        assert.eq(coll.count({type: 'ginkgo'}), 1);
        assert.eq(coll.count({type: 'oak'}), 0);
    }
});

commands.push({
    req: {
        findAndModify: collName,
        query: {type: 'oak'},
        update: {$set: {type: 'ginkgo'}},
        writeConcern: {w: 'majority'}
    },
    setupFunc: function() {
        coll.insert({type: 'oak'});
        assert.eq(coll.count({type: 'ginkgo'}), 0);
        assert.eq(coll.count({type: 'oak'}), 1);
    },
    confirmFunc: function() {
        assert.eq(coll.count({type: 'ginkgo'}), 1);
        assert.eq(coll.count({type: 'oak'}), 0);
    }
});

commands.push({
    req: {
        findAndModify: collName,
        query: {type: 'oak'},
        update: [{$set: {type: 'ginkgo'}}],
        writeConcern: {w: 'majority'}
    },
    setupFunc: function() {
        coll.insert({type: 'oak'});
        assert.eq(coll.count({type: 'ginkgo'}), 0);
        assert.eq(coll.count({type: 'oak'}), 1);
    },
    confirmFunc: function() {
        assert.eq(coll.count({type: 'ginkgo'}), 1);
        assert.eq(coll.count({type: 'oak'}), 0);
    }
});

commands.push({
    req: {applyOps: [{op: "u", ns: coll.getFullName(), o: {_id: 1, type: "willow"}, o2: {_id: 1}}]},
    setupFunc: function() {
        coll.insert({_id: 1, type: 'oak'});
        assert.eq(coll.count({type: 'willow'}), 0);
    },
    confirmFunc: function() {
        assert.eq(coll.count({type: 'willow'}), 1);
    }
});

commands.push({
    req: {aggregate: collName, pipeline: [{$sort: {type: 1}}, {$out: "foo"}], cursor: {}},
    setupFunc: function() {
        coll.insert({_id: 1, type: 'oak'});
        coll.insert({_id: 2, type: 'maple'});
    },
    confirmFunc: function() {
        assert.eq(db.foo.count({type: 'oak'}), 1);
        assert.eq(db.foo.count({type: 'maple'}), 1);
        db.foo.drop();
    }
});

commands.push({
    req: {
        mapReduce: collName,
        map: function() {
            this.tags.forEach(function(z) {
                emit(z, 1);
            });
        },
        reduce: function(key, values) {
            return {count: values.length};
        },
        out: "foo"
    },
    setupFunc: function() {
        coll.insert({x: 1, tags: ["a", "b"]});
        coll.insert({x: 2, tags: ["b", "c"]});
        coll.insert({x: 3, tags: ["c", "a"]});
        coll.insert({x: 4, tags: ["b", "c"]});
    },
    confirmFunc: function() {
        assert.eq(db.foo.findOne({_id: 'a'}).value.count, 2);
        assert.eq(db.foo.findOne({_id: 'b'}).value.count, 3);
        assert.eq(db.foo.findOne({_id: 'c'}).value.count, 3);
        db.foo.drop();
    }
});

function testValidWriteConcern(cmd) {
    cmd.req.writeConcern = {w: 'majority', wtimeout: ReplSetTest.kDefaultTimeoutMS};
    jsTest.log("Testing " + tojson(cmd.req));

    dropTestCollection();
    cmd.setupFunc();
    var res = db.runCommand(cmd.req);
    assert.commandWorked(res);
    assert(!res.writeConcernError,
           'command on a full replicaset had writeConcernError: ' + tojson(res));
    cmd.confirmFunc();
}

function testInvalidWriteConcern(cmd) {
    cmd.req.writeConcern = {w: 'invalid'};
    jsTest.log("Testing " + tojson(cmd.req));

    dropTestCollection();
    cmd.setupFunc();
    var res = coll.runCommand(cmd.req);
    assert.commandFailedWithCode(res, ErrorCodes.UnknownReplWriteConcern);
    cmd.confirmFunc();
}

commands.forEach(function(cmd) {
    testValidWriteConcern(cmd);
    testInvalidWriteConcern(cmd);
});

replTest.stopSet();
})();