(function() {
"use script";

// This test makes assertions about the number of sessions, which are not compatible with
// implicit sessions.
TestData.disableImplicitSessions = true;

var res;
var refresh = {refreshLogicalSessionCacheNow: 1};
var startSession = {startSession: 1};

// Start up a standalone server.
var conn = MongoRunner.runMongod();
var admin = conn.getDB("admin");
var config = conn.getDB("config");

// Trigger an initial refresh, as a sanity check.
res = admin.runCommand(refresh);
assert.commandWorked(res, "failed to refresh");

var sessions = [];
for (var i = 0; i < 20; i++) {
    res = admin.runCommand(startSession);
    assert.commandWorked(res, "unable to start session");
    sessions.push(res);
}

res = admin.runCommand(refresh);
assert.commandWorked(res, "failed to refresh");

assert.eq(config.system.sessions.count(), 20, "refresh should have written 20 session records");

var endSessionsIds = [];
for (var i = 0; i < 10; i++) {
    endSessionsIds.push(sessions[i].id);
}
res = admin.runCommand({endSessions: endSessionsIds});
assert.commandWorked(res, "failed to end sessions");

res = admin.runCommand(refresh);
assert.commandWorked(res, "failed to refresh");

assert.eq(config.system.sessions.count(),
          10,
          "endSessions and refresh should result in 10 remaining sessions");

// double delete the remaining 10
endSessionsIds = [];
for (var i = 10; i < 20; i++) {
    endSessionsIds.push(sessions[i].id);
    endSessionsIds.push(sessions[i].id);
}

res = admin.runCommand({endSessions: endSessionsIds});
assert.commandWorked(res, "failed to end sessions");

res = admin.runCommand(refresh);
assert.commandWorked(res, "failed to refresh");

assert.eq(config.system.sessions.count(),
          0,
          "endSessions and refresh should result in 0 remaining sessions");

// delete some sessions that were never created
res = admin.runCommand({
    endSessions: [
        {"id": UUID("bacb219c-214c-47f9-a94a-6c7f434b3bae")},
        {"id": UUID("bacb219c-214c-47f9-a94a-6c7f434b3baf")}
    ]
});

res = admin.runCommand(refresh);
assert.commandWorked(res, "failed to refresh");

// verify that end on the session handle actually ends sessions
{
    var session = conn.startSession();

    assert.commandWorked(session.getDatabase("admin").runCommand({usersInfo: 1}),
                         "do something to tickle the session");
    assert.commandWorked(session.getDatabase("admin").runCommand(refresh), "failed to refresh");
    assert.eq(config.system.sessions.count(), 1, "usersInfo should have written 1 session record");

    session.endSession();
    assert.commandWorked(admin.runCommand(refresh), "failed to refresh");
    assert.eq(config.system.sessions.count(),
              0,
              "endSessions and refresh should result in 0 remaining sessions");
}

MongoRunner.stopMongod(conn);
}());