// @tags: [
//   assumes_superuser_permissions,
//   does_not_support_stepdowns,
// ]

// Tests that using setParameter to update the parameter 'automationServiceDescriptor' causes a
// field with that name to be echoed back in hello. See SERVER-18399 for more details.

(function() {

// Run hello, and if it contains an automation service descriptor, save it, so we can restore
// it later. If it wasn't set, original will just be undefined.
var res = assert.commandWorked(db.runCommand({hello: 1}));
var original = res.automationServiceDescriptor;

// Try to set the descriptor to an invalid value: only strings are supported.
assert.commandFailedWithCode(db.adminCommand({setParameter: 1, automationServiceDescriptor: 0}),
                             ErrorCodes.TypeMismatch);

// Try to set the descriptor to an invalid value: Only 64 characters are allowed.
assert.commandFailedWithCode(db.adminCommand({
    setParameter: 1,
    automationServiceDescriptor: "1234567812345678123456781234567812345678123456781234567812345678X"
}),
                             ErrorCodes.Overflow);

// Short strings are okay.
res = assert.commandWorked(
    db.adminCommand({setParameter: 1, automationServiceDescriptor: "some_service"}));

// Verify that the setParameter 'was' field contains what we expected.
if (original)
    assert.eq(original, res.was);

// Verify that the 'some_service' string is now echoed back to us in hello
res = assert.commandWorked(db.runCommand({hello: 1}));
assert.eq(res.automationServiceDescriptor, "some_service");

// Verify that setting the descriptor to the empty string is ok, and prevents it from being
// echoed back
assert.commandWorked(db.adminCommand({setParameter: 1, automationServiceDescriptor: ""}));
res = assert.commandWorked(db.runCommand({hello: 1}));
assert(!res.hasOwnProperty('automationServiceDescriptor'));

// Verify that the shell has the correct prompt.
var originalPrompt = db.getMongo().promptPrefix;
assert.commandWorked(db.adminCommand({setParameter: 1, automationServiceDescriptor: "set"}));
db.getMongo().promptPrefix = undefined;
assert(/\[automated\]/.test(defaultPrompt()));

// Restore whatever was there originally.
if (!original)
    original = "";
assert.commandWorked(db.adminCommand({setParameter: 1, automationServiceDescriptor: original}));
db.getMongo().promptPrefix = originalPrompt;
}());