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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.
'use strict';
// tslint:disable:no-any
import { assert, expect } from 'chai';
import * as sinon from 'sinon';
import { anything, instance, mock, resetCalls, verify, when } from 'ts-mockito';
import * as TypeMoq from 'typemoq';
import { WorkspaceConfiguration } from 'vscode';
import { ApplicationEnvironment } from '../../client/common/application/applicationEnvironment';
import { IApplicationEnvironment, IWorkspaceService } from '../../client/common/application/types';
import { WorkspaceService } from '../../client/common/application/workspace';
import { PythonSettings } from '../../client/common/configSettings';
import { ConfigurationService } from '../../client/common/configuration/service';
import { CryptoUtils } from '../../client/common/crypto';
import {
configUri,
downloadedExperimentStorageKey,
ExperimentsManager,
experimentStorageKey,
isDownloadedStorageValidKey,
oldExperimentSalts
} from '../../client/common/experiments';
import { HttpClient } from '../../client/common/net/httpClient';
import { PersistentStateFactory } from '../../client/common/persistentState';
import { FileSystem } from '../../client/common/platform/fileSystem';
import { IFileSystem } from '../../client/common/platform/types';
import {
ICryptoUtils,
IExperiments,
IHttpClient,
IOutputChannel,
IPersistentState,
IPersistentStateFactory
} from '../../client/common/types';
import { createDeferred, createDeferredFromPromise } from '../../client/common/utils/async';
import { sleep } from '../common';
import { noop } from '../core';
// tslint:disable: max-func-body-length
suite('A/B experiments', () => {
let workspaceService: IWorkspaceService;
let httpClient: IHttpClient;
let crypto: ICryptoUtils;
let appEnvironment: IApplicationEnvironment;
let persistentStateFactory: IPersistentStateFactory;
let isDownloadedStorageValid: TypeMoq.IMock<IPersistentState<boolean>>;
let experimentStorage: TypeMoq.IMock<IPersistentState<any>>;
let downloadedExperimentsStorage: TypeMoq.IMock<IPersistentState<any>>;
let output: TypeMoq.IMock<IOutputChannel>;
let fs: IFileSystem;
let expManager: ExperimentsManager;
let configurationService: ConfigurationService;
let experiments: TypeMoq.IMock<IExperiments>;
setup(() => {
workspaceService = mock(WorkspaceService);
httpClient = mock(HttpClient);
crypto = mock(CryptoUtils);
appEnvironment = mock(ApplicationEnvironment);
persistentStateFactory = mock(PersistentStateFactory);
isDownloadedStorageValid = TypeMoq.Mock.ofType<IPersistentState<boolean>>();
experimentStorage = TypeMoq.Mock.ofType<IPersistentState<any>>();
downloadedExperimentsStorage = TypeMoq.Mock.ofType<IPersistentState<any>>();
output = TypeMoq.Mock.ofType<IOutputChannel>();
configurationService = mock(ConfigurationService);
experiments = TypeMoq.Mock.ofType<IExperiments>();
const settings = mock(PythonSettings);
when(settings.experiments).thenReturn(experiments.object);
experiments.setup(e => e.optInto).returns(() => []);
experiments.setup(e => e.optOutFrom).returns(() => []);
when(configurationService.getSettings(undefined)).thenReturn(instance(settings));
fs = mock(FileSystem);
when(
persistentStateFactory.createGlobalPersistentState(isDownloadedStorageValidKey, false, anything())
).thenReturn(isDownloadedStorageValid.object);
when(persistentStateFactory.createGlobalPersistentState(experimentStorageKey, undefined as any)).thenReturn(
experimentStorage.object
);
when(
persistentStateFactory.createGlobalPersistentState(downloadedExperimentStorageKey, undefined as any)
).thenReturn(downloadedExperimentsStorage.object);
expManager = new ExperimentsManager(
instance(persistentStateFactory),
instance(workspaceService),
instance(httpClient),
instance(crypto),
instance(appEnvironment),
output.object,
instance(fs),
instance(configurationService)
);
});
teardown(() => {
sinon.restore();
});
async function testInitialization(
downloadError: boolean = false,
experimentsDownloaded: any = [{ name: 'experiment1', salt: 'salt', min: 90, max: 100 }]
) {
if (downloadError) {
when(httpClient.getJSON(configUri, false)).thenReject(new Error('Kaboom'));
} else {
when(httpClient.getJSON(configUri, false)).thenResolve(experimentsDownloaded);
}
try {
await expManager.initializeInBackground();
// tslint:disable-next-line:no-empty
} catch {}
isDownloadedStorageValid.verifyAll();
}
test('Initializing experiments does not download experiments if storage is valid and contains experiments', async () => {
isDownloadedStorageValid
.setup(n => n.value)
.returns(() => true)
.verifiable(TypeMoq.Times.once());
await testInitialization();
verify(httpClient.getJSON(configUri, false)).never();
});
test('If storage has expired, initializing experiments downloads the experiments, but does not store them if they are invalid or incomplete', async () => {
const abExperiments = [{ name: 'experiment1', salt: 'salt', max: 100 }];
isDownloadedStorageValid
.setup(n => n.value)
.returns(() => false)
.verifiable(TypeMoq.Times.once());
isDownloadedStorageValid
.setup(n => n.updateValue(true))
.returns(() => Promise.resolve(undefined))
.verifiable(TypeMoq.Times.never());
downloadedExperimentsStorage
.setup(n => n.updateValue(abExperiments))
.returns(() => Promise.resolve(undefined))
.verifiable(TypeMoq.Times.never());
// downloadError = false, experimentsDownloaded = experiments
await testInitialization(false, abExperiments);
verify(httpClient.getJSON(configUri, false)).once();
});
test('If storage has expired, initializing experiments downloads the experiments, and stores them if they are valid', async () => {
isDownloadedStorageValid
.setup(n => n.value)
.returns(() => false)
.verifiable(TypeMoq.Times.once());
isDownloadedStorageValid
.setup(n => n.updateValue(true))
.returns(() => Promise.resolve(undefined))
.verifiable(TypeMoq.Times.once());
downloadedExperimentsStorage
.setup(n => n.updateValue([{ name: 'experiment1', salt: 'salt', min: 90, max: 100 }]))
.returns(() => Promise.resolve(undefined))
.verifiable(TypeMoq.Times.once());
await testInitialization();
verify(httpClient.getJSON(configUri, false)).once();
});
test('If downloading experiments fails with error, the storage is left as it is', async () => {
isDownloadedStorageValid
.setup(n => n.value)
.returns(() => false)
.verifiable(TypeMoq.Times.once());
isDownloadedStorageValid
.setup(n => n.updateValue(true))
.returns(() => Promise.resolve(undefined))
.verifiable(TypeMoq.Times.never());
downloadedExperimentsStorage
.setup(n => n.updateValue(anything()))
.returns(() => Promise.resolve(undefined))
.verifiable(TypeMoq.Times.never());
// downloadError = true
await testInitialization(true);
verify(httpClient.getJSON(configUri, false)).once();
});
test('If the users have opted out of telemetry, then they are opted out of AB testing ', async () => {
const workspaceConfig = TypeMoq.Mock.ofType<WorkspaceConfiguration>();
const settings = { globalValue: false };
when(workspaceService.getConfiguration('telemetry')).thenReturn(workspaceConfig.object);
workspaceConfig
.setup(c => c.inspect<boolean>('enableTelemetry'))
.returns(() => settings as any)
.verifiable(TypeMoq.Times.once());
downloadedExperimentsStorage
.setup(n => n.value)
.returns(() => undefined)
.verifiable(TypeMoq.Times.never());
await expManager.activate();
verify(workspaceService.getConfiguration('telemetry')).once();
workspaceConfig.verifyAll();
downloadedExperimentsStorage.verifyAll();
});
async function testEnablingExperiments(enabled: boolean) {
const updateExperimentStorage = sinon.stub(ExperimentsManager.prototype, 'updateExperimentStorage');
updateExperimentStorage.callsFake(() => Promise.resolve());
const populateUserExperiments = sinon.stub(ExperimentsManager.prototype, 'populateUserExperiments');
populateUserExperiments.callsFake(() => Promise.resolve());
const initializeInBackground = sinon.stub(ExperimentsManager.prototype, 'initializeInBackground');
initializeInBackground.callsFake(() => Promise.resolve());
const workspaceConfig = TypeMoq.Mock.ofType<WorkspaceConfiguration>();
const settings = {};
experiments
.setup(e => e.enabled)
.returns(() => enabled)
.verifiable(TypeMoq.Times.atLeastOnce());
when(workspaceService.getConfiguration('telemetry')).thenReturn(workspaceConfig.object);
workspaceConfig
.setup(c => c.inspect<boolean>('enableTelemetry'))
.returns(() => settings as any)
.verifiable(TypeMoq.Times.once());
expManager = new ExperimentsManager(
instance(persistentStateFactory),
instance(workspaceService),
instance(httpClient),
instance(crypto),
instance(appEnvironment),
output.object,
instance(fs),
instance(configurationService)
);
await expManager.activate();
// If experiments are disabled, then none of these methods will be invoked & vice versa.
assert.equal(updateExperimentStorage.callCount, enabled ? 1 : 0);
assert.equal(populateUserExperiments.callCount, enabled ? 1 : 0);
assert.equal(initializeInBackground.callCount, enabled ? 1 : 0);
workspaceConfig.verifyAll();
experiments.verifyAll();
}
test('Ensure experiments are not initialized when it is disabled', async () => testEnablingExperiments(false));
test('Ensure experiments are initialized when it is enabled', async () => testEnablingExperiments(true));
async function testEnablingExperimentsToCheckIfInExperiment(enabled: boolean) {
const sendTelemetry = sinon.stub(ExperimentsManager.prototype, 'sendTelemetryIfInExperiment');
sendTelemetry.callsFake((_: string) => noop());
experiments
.setup(e => e.enabled)
.returns(() => enabled)
.verifiable(TypeMoq.Times.atLeastOnce());
expManager = new ExperimentsManager(
instance(persistentStateFactory),
instance(workspaceService),
instance(httpClient),
instance(crypto),
instance(appEnvironment),
output.object,
instance(fs),
instance(configurationService)
);
expManager.userExperiments.push({ name: 'this should be in experiment', max: 0, min: 0, salt: '' });
// If experiments are disabled, then `inExperiment` will return false & vice versa.
assert.equal(expManager.inExperiment('this should be in experiment'), enabled);
// This experiment does not exist, hence `inExperiment` will always be `false` for this.
assert.equal(expManager.inExperiment('this should never be in experiment'), false);
experiments.verifyAll();
}
test('Ensure inExperiment is true when experiments are enabled', async () =>
testEnablingExperimentsToCheckIfInExperiment(true));
test('Ensure inExperiment is false when experiments are disabled', async () =>
testEnablingExperimentsToCheckIfInExperiment(false));
test('Ensure experiments can only be activated once', async () => {
const updateExperimentStorage = sinon.stub(ExperimentsManager.prototype, 'updateExperimentStorage');
updateExperimentStorage.callsFake(() => Promise.resolve());
const populateUserExperiments = sinon.stub(ExperimentsManager.prototype, 'populateUserExperiments');
populateUserExperiments.callsFake(() => Promise.resolve());
const initializeInBackground = sinon.stub(ExperimentsManager.prototype, 'initializeInBackground');
initializeInBackground.callsFake(() => Promise.resolve());
expManager = new ExperimentsManager(
instance(persistentStateFactory),
instance(workspaceService),
instance(httpClient),
instance(crypto),
instance(appEnvironment),
output.object,
instance(fs),
instance(configurationService)
);
// Activate it twice and check
const workspaceConfig = TypeMoq.Mock.ofType<WorkspaceConfiguration>();
const settings = {};
when(workspaceService.getConfiguration('telemetry')).thenReturn(workspaceConfig.object);
workspaceConfig
.setup(c => c.inspect<boolean>('enableTelemetry'))
.returns(() => settings as any)
.verifiable(TypeMoq.Times.once());
// First activation
await expManager.activate();
resetCalls(workspaceService);
// Second activation
await expManager.activate();
verify(workspaceService.getConfiguration(anything())).never();
workspaceConfig.verifyAll();
});
test('Ensure experiments are reliably downloaded in the background', async () => {
const experimentsDeferred = createDeferred<void>();
const workspaceConfig = TypeMoq.Mock.ofType<WorkspaceConfiguration>();
const settings = {};
const updateExperimentStorage = sinon.stub(ExperimentsManager.prototype, 'updateExperimentStorage');
updateExperimentStorage.callsFake(() => Promise.resolve());
const populateUserExperiments = sinon.stub(ExperimentsManager.prototype, 'populateUserExperiments');
populateUserExperiments.callsFake(() => Promise.resolve());
const initializeInBackground = sinon.stub(ExperimentsManager.prototype, 'initializeInBackground');
initializeInBackground.callsFake(() => experimentsDeferred.promise);
expManager = new ExperimentsManager(
instance(persistentStateFactory),
instance(workspaceService),
instance(httpClient),
instance(crypto),
instance(appEnvironment),
output.object,
instance(fs),
instance(configurationService)
);
when(workspaceService.getConfiguration('telemetry')).thenReturn(workspaceConfig.object);
workspaceConfig
.setup(c => c.inspect<boolean>('enableTelemetry'))
.returns(() => settings as any)
.verifiable(TypeMoq.Times.once());
const promise = expManager.activate();
const deferred = createDeferredFromPromise(promise);
await sleep(1);
// Ensure activate() function has completed while experiments are still being downloaded
assert.equal(deferred.completed, true);
experimentsDeferred.resolve();
await sleep(1);
verify(workspaceService.getConfiguration('telemetry')).once();
workspaceConfig.verifyAll();
assert.ok(initializeInBackground.calledOnce);
});
test('Ensure experiment storage is updated to contain the latest downloaded experiments', async () => {
downloadedExperimentsStorage
.setup(n => n.value)
.returns(() => [{ name: 'experiment1', salt: 'salt', min: 90, max: 100 }])
.verifiable(TypeMoq.Times.atLeastOnce());
downloadedExperimentsStorage
.setup(n => n.updateValue(undefined))
.returns(() => Promise.resolve(undefined))
.verifiable(TypeMoq.Times.once());
experimentStorage
.setup(n => n.updateValue([{ name: 'experiment1', salt: 'salt', min: 90, max: 100 }]))
.returns(() => Promise.resolve(undefined))
.verifiable(TypeMoq.Times.once());
await expManager.updateExperimentStorage();
experimentStorage.verifyAll();
downloadedExperimentsStorage.verifyAll();
});
test('When latest experiments are not available, but experiment storage contains experiments, then experiment storage is not updated', async () => {
const doBestEffortToPopulateExperiments = sinon.stub(
ExperimentsManager.prototype,
'doBestEffortToPopulateExperiments'
);
doBestEffortToPopulateExperiments.callsFake(() => Promise.resolve(false));
expManager = new ExperimentsManager(
instance(persistentStateFactory),
instance(workspaceService),
instance(httpClient),
instance(crypto),
instance(appEnvironment),
output.object,
instance(fs),
instance(configurationService)
);
downloadedExperimentsStorage
.setup(n => n.value)
.returns(() => undefined)
.verifiable(TypeMoq.Times.once());
downloadedExperimentsStorage
.setup(n => n.updateValue(undefined))
.returns(() => Promise.resolve(undefined))
.verifiable(TypeMoq.Times.never());
experimentStorage
.setup(n => n.value)
.returns(() => [{ name: 'experiment1', salt: 'salt', min: 90, max: 100 }])
.verifiable(TypeMoq.Times.once());
experimentStorage
.setup(n => n.updateValue(TypeMoq.It.isAny()))
.returns(() => Promise.resolve(undefined))
.verifiable(TypeMoq.Times.never());
await expManager.updateExperimentStorage();
assert.ok(doBestEffortToPopulateExperiments.notCalled);
experimentStorage.verifyAll();
downloadedExperimentsStorage.verifyAll();
});
test('When best effort to populate experiments succeeds, function updateStorage() returns', async () => {
const doBestEffortToPopulateExperiments = sinon.stub(
ExperimentsManager.prototype,
'doBestEffortToPopulateExperiments'
);
doBestEffortToPopulateExperiments.callsFake(() => Promise.resolve(true));
expManager = new ExperimentsManager(
instance(persistentStateFactory),
instance(workspaceService),
instance(httpClient),
instance(crypto),
instance(appEnvironment),
output.object,
instance(fs),
instance(configurationService)
);
downloadedExperimentsStorage
.setup(n => n.value)
.returns(() => undefined)
.verifiable(TypeMoq.Times.once());
downloadedExperimentsStorage
.setup(n => n.updateValue(undefined))
.returns(() => Promise.resolve(undefined))
.verifiable(TypeMoq.Times.never());
experimentStorage
.setup(n => n.value)
.returns(() => undefined)
.verifiable(TypeMoq.Times.once());
await expManager.updateExperimentStorage();
assert.ok(doBestEffortToPopulateExperiments.calledOnce);
experimentStorage.verifyAll();
downloadedExperimentsStorage.verifyAll();
});
test('When latest experiments are not available, experiment storage is empty, but if local experiments file is not valid, experiment storage is not updated', async () => {
const doBestEffortToPopulateExperiments = sinon.stub(
ExperimentsManager.prototype,
'doBestEffortToPopulateExperiments'
);
doBestEffortToPopulateExperiments.callsFake(() => Promise.resolve(false));
expManager = new ExperimentsManager(
instance(persistentStateFactory),
instance(workspaceService),
instance(httpClient),
instance(crypto),
instance(appEnvironment),
output.object,
instance(fs),
instance(configurationService)
);
downloadedExperimentsStorage
.setup(n => n.value)
.returns(() => undefined)
.verifiable(TypeMoq.Times.once());
downloadedExperimentsStorage
.setup(n => n.updateValue(undefined))
.returns(() => Promise.resolve(undefined))
.verifiable(TypeMoq.Times.never());
// tslint:disable-next-line:no-multiline-string
const fileContent = `
// Yo! I am a JSON file with comments as well as trailing commas!
[{ "name": "experiment1", "salt": "salt", "min": 90, },]
`;
when(fs.fileExists(anything())).thenResolve(true);
when(fs.readFile(anything())).thenResolve(fileContent);
experimentStorage
.setup(n => n.value)
.returns(() => undefined)
.verifiable(TypeMoq.Times.once());
experimentStorage
.setup(n => n.updateValue(TypeMoq.It.isAny()))
.returns(() => Promise.resolve(undefined))
.verifiable(TypeMoq.Times.never());
await expManager.updateExperimentStorage();
verify(fs.fileExists(anything())).once();
verify(fs.readFile(anything())).once();
experimentStorage.verifyAll();
downloadedExperimentsStorage.verifyAll();
});
test('When latest experiments are not available, and experiment storage is empty, then experiment storage is updated using local experiments file given experiments are valid', async () => {
const doBestEffortToPopulateExperiments = sinon.stub(
ExperimentsManager.prototype,
'doBestEffortToPopulateExperiments'
);
doBestEffortToPopulateExperiments.callsFake(() => Promise.resolve(false));
expManager = new ExperimentsManager(
instance(persistentStateFactory),
instance(workspaceService),
instance(httpClient),
instance(crypto),
instance(appEnvironment),
output.object,
instance(fs),
instance(configurationService)
);
downloadedExperimentsStorage
.setup(n => n.value)
.returns(() => undefined)
.verifiable(TypeMoq.Times.once());
downloadedExperimentsStorage
.setup(n => n.updateValue(undefined))
.returns(() => Promise.resolve(undefined))
.verifiable(TypeMoq.Times.never());
// tslint:disable-next-line:no-multiline-string
const fileContent = `
// Yo! I am a JSON file with comments as well as trailing commas!
[{ "name": "experiment1", "salt": "salt", "min": 90, "max": 100, },]
`;
when(fs.fileExists(anything())).thenResolve(true);
when(fs.readFile(anything())).thenResolve(fileContent);
experimentStorage
.setup(n => n.value)
.returns(() => undefined)
.verifiable(TypeMoq.Times.once());
experimentStorage
.setup(n => n.updateValue([{ name: 'experiment1', salt: 'salt', min: 90, max: 100 }]))
.returns(() => Promise.resolve(undefined))
.verifiable(TypeMoq.Times.once());
await expManager.updateExperimentStorage();
verify(fs.fileExists(anything())).once();
verify(fs.readFile(anything())).once();
experimentStorage.verifyAll();
downloadedExperimentsStorage.verifyAll();
});
suite(
'When latest experiments are not available, and experiment storage is empty, then function updateExperimentStorage() stops execution and returns',
() => {
setup(() => {
const doBestEffortToPopulateExperiments = sinon.stub(
ExperimentsManager.prototype,
'doBestEffortToPopulateExperiments'
);
doBestEffortToPopulateExperiments.callsFake(() => Promise.resolve(false));
expManager = new ExperimentsManager(
instance(persistentStateFactory),
instance(workspaceService),
instance(httpClient),
instance(crypto),
instance(appEnvironment),
output.object,
instance(fs),
instance(configurationService)
);
});
test('If checking the existence of config file fails', async () => {
downloadedExperimentsStorage
.setup(n => n.value)
.returns(() => undefined)
.verifiable(TypeMoq.Times.once());
downloadedExperimentsStorage
.setup(n => n.updateValue(undefined))
.returns(() => Promise.resolve(undefined))
.verifiable(TypeMoq.Times.never());
const error = new Error('Kaboom');
when(fs.fileExists(anything())).thenThrow(error);
when(fs.readFile(anything())).thenResolve('fileContent');
experimentStorage
.setup(n => n.value)
.returns(() => undefined)
.verifiable(TypeMoq.Times.once());
experimentStorage
.setup(n => n.updateValue(TypeMoq.It.isAny()))
.returns(() => Promise.resolve(undefined))
.verifiable(TypeMoq.Times.never());
await expManager.updateExperimentStorage();
verify(fs.fileExists(anything())).once();
verify(fs.readFile(anything())).never();
experimentStorage.verifyAll();
downloadedExperimentsStorage.verifyAll();
});
test('If reading config file fails', async () => {
downloadedExperimentsStorage
.setup(n => n.value)
.returns(() => undefined)
.verifiable(TypeMoq.Times.once());
downloadedExperimentsStorage
.setup(n => n.updateValue(undefined))
.returns(() => Promise.resolve(undefined))
.verifiable(TypeMoq.Times.never());
const error = new Error('Kaboom');
when(fs.fileExists(anything())).thenResolve(true);
when(fs.readFile(anything())).thenThrow(error);
experimentStorage
.setup(n => n.value)
.returns(() => undefined)
.verifiable(TypeMoq.Times.once());
experimentStorage
.setup(n => n.updateValue(TypeMoq.It.isAny()))
.returns(() => Promise.resolve(undefined))
.verifiable(TypeMoq.Times.never());
await expManager.updateExperimentStorage();
verify(fs.fileExists(anything())).once();
verify(fs.readFile(anything())).once();
experimentStorage.verifyAll();
downloadedExperimentsStorage.verifyAll();
});
test('If config file does not exist', async () => {
downloadedExperimentsStorage
.setup(n => n.value)
.returns(() => undefined)
.verifiable(TypeMoq.Times.once());
downloadedExperimentsStorage
.setup(n => n.updateValue(undefined))
.returns(() => Promise.resolve(undefined))
.verifiable(TypeMoq.Times.never());
when(fs.fileExists(anything())).thenResolve(false);
when(fs.readFile(anything())).thenResolve('fileContent');
experimentStorage
.setup(n => n.value)
.returns(() => undefined)
.verifiable(TypeMoq.Times.once());
experimentStorage
.setup(n => n.updateValue(TypeMoq.It.isAny()))
.returns(() => Promise.resolve(undefined))
.verifiable(TypeMoq.Times.never());
await expManager.updateExperimentStorage();
verify(fs.fileExists(anything())).once();
verify(fs.readFile(anything())).never();
experimentStorage.verifyAll();
downloadedExperimentsStorage.verifyAll();
});
test('If parsing file or updating storage fails', async () => {
downloadedExperimentsStorage
.setup(n => n.value)
.returns(() => undefined)
.verifiable(TypeMoq.Times.once());
downloadedExperimentsStorage
.setup(n => n.updateValue(undefined))
.returns(() => Promise.resolve(undefined))
.verifiable(TypeMoq.Times.never());
// tslint:disable-next-line:no-multiline-string
const fileContent = `
// Yo! I am a JSON file with comments as well as trailing commas!
[{ "name": "experiment1", "salt": "salt", "min": 90, "max": 100 },]
`;
const error = new Error('Kaboom');
when(fs.fileExists(anything())).thenResolve(true);
when(fs.readFile(anything())).thenResolve(fileContent);
experimentStorage
.setup(n => n.value)
.returns(() => undefined)
.verifiable(TypeMoq.Times.once());
experimentStorage
.setup(n => n.updateValue(TypeMoq.It.isAny()))
.returns(() => Promise.reject(error))
.verifiable(TypeMoq.Times.once());
await expManager.updateExperimentStorage();
verify(fs.fileExists(anything())).once();
verify(fs.readFile(anything())).once();
experimentStorage.verifyAll();
downloadedExperimentsStorage.verifyAll();
});
}
);
const testsForInExperiment = [
{
testName: "If experiment's name is not in user experiment list, user is not in experiment",
experimentName: 'imaginary experiment',
userExperiments: [
{ name: 'experiment1', salt: 'salt', min: 79, max: 94 },
{ name: 'experiment2', salt: 'salt', min: 19, max: 30 }
],
expectedResult: false
},
{
testName:
"If experiment's name is in user experiment list and hash modulo output is in range, user is in experiment",
experimentName: 'experiment1',
userExperiments: [
{ name: 'experiment1', salt: 'salt', min: 79, max: 94 },
{ name: 'experiment2', salt: 'salt', min: 19, max: 30 }
],
expectedResult: true
}
];
testsForInExperiment.forEach(testParams => {
test(testParams.testName, async () => {
expManager.userExperiments = testParams.userExperiments;
expect(expManager.inExperiment(testParams.experimentName)).to.equal(
testParams.expectedResult,
'Incorrectly identified'
);
});
});
const testsForIsUserInRange = [
// Note min equals 79 and max equals 94
{
testName: 'Returns true if hash modulo output is in range',
hash: 1181,
expectedResult: true
},
{
testName: 'Returns false if hash modulo is less than min',
hash: 967,
expectedResult: false
},
{
testName: 'Returns false if hash modulo is more than max',
hash: 3297,
expectedResult: false
},
{
testName: 'If checking if user is in range fails with error, throw error',
hash: 3297,
error: true,
expectedResult: false
},
{
testName: 'If machine ID is bogus, throw error',
hash: 3297,
machineIdError: true,
expectedResult: false
}
];
suite('Function IsUserInRange()', () => {
testsForIsUserInRange.forEach(testParams => {
test(testParams.testName, async () => {
when(appEnvironment.machineId).thenReturn('101');
if (testParams.machineIdError) {
when(appEnvironment.machineId).thenReturn(undefined as any);
expect(() => expManager.isUserInRange(79, 94, 'salt')).to.throw();
} else if (testParams.error) {
const error = new Error('Kaboom');
when(crypto.createHash(anything(), 'number', anything())).thenThrow(error);
expect(() => expManager.isUserInRange(79, 94, 'salt')).to.throw(error);
} else {
when(crypto.createHash(anything(), 'number', anything())).thenReturn(testParams.hash);
expect(expManager.isUserInRange(79, 94, 'salt')).to.equal(
testParams.expectedResult,
'Incorrectly identified'
);
}
});
});
test('If experiment salt belongs to an old experiment, keep using `SHA512` algorithm', async () => {
when(appEnvironment.machineId).thenReturn('101');
when(crypto.createHash(anything(), 'number', 'SHA512')).thenReturn(644);
when(crypto.createHash(anything(), anything(), 'FNV')).thenReturn(1293);
// 'ShowPlayIcon' is one of the old experiments
expManager.isUserInRange(79, 94, 'ShowPlayIcon');
verify(crypto.createHash(anything(), 'number', 'SHA512')).once();
verify(crypto.createHash(anything(), anything(), 'FNV')).never();
});
test('If experiment salt does not belong to an old experiment, use `FNV` algorithm', async () => {
when(appEnvironment.machineId).thenReturn('101');
when(crypto.createHash(anything(), anything(), 'SHA512')).thenReturn(644);
when(crypto.createHash(anything(), 'number', 'FNV')).thenReturn(1293);
expManager.isUserInRange(79, 94, 'NewExperimentSalt');
verify(crypto.createHash(anything(), anything(), 'SHA512')).never();
verify(crypto.createHash(anything(), 'number', 'FNV')).once();
});
test('Use the expected list of old experiments', async () => {
const expectedOldExperimentSalts = [
'ShowExtensionSurveyPrompt',
'ShowPlayIcon',
'AlwaysDisplayTestExplorer',
'LS'
];
assert.deepEqual(expectedOldExperimentSalts, oldExperimentSalts);
});
});
const testsForPopulateUserExperiments = [
{
testName: 'User experiments list is empty if experiment storage value is not an array',
experimentStorageValue: undefined,
expectedResult: []
},
{
testName: 'User experiments list is empty if experiment storage value is an empty array',
experimentStorageValue: [],
expectedResult: []
},
{
testName:
'User experiments list does not contain any experiments if user has requested to opt out of all experiments',
experimentStorageValue: [
{ name: 'experiment1 - control', salt: 'salt', min: 79, max: 94 },
{ name: 'experiment2 - control', salt: 'salt', min: 80, max: 90 }
],
hash: 8187,
experimentsOptedOutFrom: ['All'],
expectedResult: []
},
{
testName:
'User experiments list contains all experiments if user has requested to opt into all experiments',
experimentStorageValue: [
{ name: 'experiment1 - control', salt: 'salt', min: 79, max: 94 },
{ name: 'experiment2 - control', salt: 'salt', min: 80, max: 90 }
],
hash: 8187,
experimentsOptedInto: ['All'],
expectedResult: [
{ name: 'experiment1 - control', salt: 'salt', min: 79, max: 94 },
{ name: 'experiment2 - control', salt: 'salt', min: 80, max: 90 }
]
},
{
testName:
'User experiments list contains the experiment if user has requested to opt in a control group but is not in experiment range',
experimentStorageValue: [{ name: 'experiment2 - control', salt: 'salt', min: 19, max: 30 }],
hash: 8187,
experimentsOptedInto: ['experiment2 - control'],
expectedResult: []
},
{
testName:
'User experiments list contains the experiment if user has requested to opt out of a control group but user is in experiment range',
experimentStorageValue: [
{ name: 'experiment1 - control', salt: 'salt', min: 79, max: 94 },
{ name: 'experiment2 - control', salt: 'salt', min: 19, max: 30 }
],
hash: 8187,
experimentsOptedOutFrom: ['experiment1 - control'],
expectedResult: [{ name: 'experiment1 - control', salt: 'salt', min: 79, max: 94 }]
},
{
testName:
'User experiments list does not contains the experiment if user has opted out of experiment even though user is in experiment range',
experimentStorageValue: [
{ name: 'experiment1', salt: 'salt', min: 79, max: 94 },
{ name: 'experiment2', salt: 'salt', min: 19, max: 30 }
],
hash: 8187,
experimentsOptedOutFrom: ['experiment1'],
expectedResult: []
},
{
testName:
'User experiments list contains the experiment if user has opted into the experiment even though user is not in experiment range',
experimentStorageValue: [
{ name: 'experiment1', salt: 'salt', min: 79, max: 94 },
{ name: 'experiment2', salt: 'salt', min: 19, max: 30 }
],
hash: 8187,
experimentsOptedInto: ['experiment1'],
expectedResult: [{ name: 'experiment1', salt: 'salt', min: 79, max: 94 }]
},
{
testName:
'User experiments list does not contain the experiment if user has both opted in and out of an experiment',
experimentStorageValue: [
{ name: 'experiment1', salt: 'salt', min: 79, max: 94 },
{ name: 'experiment2', salt: 'salt', min: 19, max: 30 }
],
hash: 8187,
experimentsOptedInto: ['experiment1'],
experimentsOptedOutFrom: ['experiment1'],
expectedResult: []
},
{
testName: 'Otherwise user experiments list contains the experiment if user is in experiment range',
experimentStorageValue: [
{ name: 'experiment1', salt: 'salt', min: 79, max: 94 },
{ name: 'experiment2', salt: 'salt', min: 19, max: 30 }
],
hash: 8187,
expectedResult: [{ name: 'experiment1', salt: 'salt', min: 79, max: 94 }]
}
];
suite('Function populateUserExperiments', async () => {
testsForPopulateUserExperiments.forEach(testParams => {
test(testParams.testName, async () => {
experimentStorage.setup(n => n.value).returns(() => testParams.experimentStorageValue);
when(appEnvironment.machineId).thenReturn('101');
if (testParams.hash) {
when(crypto.createHash(anything(), 'number', anything())).thenReturn(testParams.hash);
}
if (testParams.experimentsOptedInto) {
expManager._experimentsOptedInto = testParams.experimentsOptedInto;
}
if (testParams.experimentsOptedOutFrom) {
expManager._experimentsOptedOutFrom = testParams.experimentsOptedOutFrom;
}
expManager.populateUserExperiments();
assert.deepEqual(expManager.userExperiments, testParams.expectedResult);
});
});
});
const testsForAreExperimentsValid = [
{
testName: 'If experiments are not an array, return false',
experiments: undefined,
expectedResult: false
},
{
testName: 'If any experiment have `min` field missing, return false',
experiments: [
{ name: 'experiment1', salt: 'salt', max: 94 },
{ name: 'experiment2', salt: 'salt', min: 19, max: 30 }
],
expectedResult: false
},
{
testName: 'If any experiment have `max` field missing, return false',
experiments: [
{ name: 'experiment1', salt: 'salt', min: 79 },
{ name: 'experiment2', salt: 'salt', min: 19, max: 30 }
],
expectedResult: false
},
{
testName: 'If any experiment have `salt` field missing, return false',
experiments: [
{ name: 'experiment1', min: 79, max: 94 },
{ name: 'experiment2', salt: 'salt', min: 19, max: 30 }
],
expectedResult: false
},
{
testName: 'If any experiment have `name` field missing, return false',
experiments: [
{ salt: 'salt', min: 79, max: 94 },
{ name: 'experiment2', salt: 'salt', min: 19, max: 30 }
],
expectedResult: false
},
{
testName: 'If all experiments contain all the fields in type `ABExperiment`, return true',
experiments: [
{ name: 'experiment1', salt: 'salt', min: 79, max: 94 },
{ name: 'experiment2', salt: 'salt', min: 19, max: 30 }
],